Re: [RBW] Re: Broken Crank (Quickbeam)

[Ron Mc]

thanks Bob, I was curious.  While that is a high stress area, seems like 
there has to be something in the surface or microstructure producing a 
stress riser to get such a well-defined and straight crack origin.  

On Wednesday, May 6, 2015 at 11:26:16 AM UTC-5, Statrixbob wrote:
>
>
> On Thu, Apr 30, 2015 at 6:41 AM, Ron Mc > 
> wrote:
>
>> Was the crack coincident with a stamped marking in the crank arm?  
>
>
> I checked and no, there's no stamped marking on that part of the crank. 
> Just one of those things. :-)
>
>
> Aloha,
>
> Bob
>
>
> -- 
> Robert Harrison
> Honolulu, HI
>
>  

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Robert F. Harrison]

On Thu, Apr 30, 2015 at 6:41 AM, Ron Mc  wrote:

> Was the crack coincident with a stamped marking in the crank arm?


I checked and no, there's no stamped marking on that part of the crank.
Just one of those things. :-)


Aloha,

Bob


-- 
Robert Harrison
Honolulu, HI
rfharri...@gmail.com
statrix.com
Wu Name: Tha Eurythmic King of Nowhere

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Robert F. Harrison]

On Thu, Apr 30, 2015 at 7:48 AM, Minh  wrote:

> if you want to treat yourself i recently put on a White Industries crank
> that looks awesome.


Which of their cranks did you use? What size BB? And, since you say it
looks awesome, got an image? :-)

Aloha, Bob


-- 
Robert Harrison
Honolulu, HI
rfharri...@gmail.com
statrix.com
Wu Name: Tha Eurythmic King of Nowhere

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Michael Rivers]

I ran a Campy square taper crank with one 39t ring on the outer side of the 
crank with single ring bolts for a long time.  The Campy 110 BB set up a 
perfect chainline.  Recently switched to the VO with 44t ring and 115 BB which 
is a little inward.

Michael

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[RBW] Re: Broken Crank (Quickbeam)

[Lungimsam]

Bob,

I am glad you didn't get hurt! Let the folks at RBW know, as I think at 
least Grant Petersen would want to see the crank. Seems like he has a great 
love for Sugino cranks and I think he would be interested.

I need to remember to check my cranks from time to time.

Congrats on the metric century, by the way! Looked like a day of fun riding 
in beautiful surroundings!

I can't recommend cranks because I don't know from single speeds. But in 
general, I know Sugino cranks are great, and the new Rene Herse cranks look 
interesting with their same bcd size for all rings, even on their triples, 
and ring replaceability without needing to remove the crank arm. Cool 
feature.

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[RBW] Re: Broken Crank (Quickbeam)

[Ron Mc]

fwiw, the highest load you ever (always) put on a crank is when you stand 
on one side to take off.  I know a lot of people lead with their right 
foot, but I do the left thing, too.  In the taper area, right-side crank 
arms are usually stronger because there's more medal there.  But that 
doesn't apply to where Bob's broke.  

On Thursday, April 30, 2015 at 2:44:38 PM UTC-5, Ryan Fleming wrote:
>
> Yikes! That's disconcerting! I'm certainly glad you weren't hurt!
> On Thursday, April 30, 2015 at 9:56:15 AM UTC-5, Statrixbob wrote:
>>
>> Oops, I just made the photos public. 
>>
>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>
>> Mea culpa and aloha!
>>
>> Bob
>> On Apr 29, 2015 5:51 PM, "Robert F. Harrison"  wrote:
>>
>>> First let me say...no injuries, no accident, didn't even fall over. 
>>> Having said that, it was a bit unexpected and I'm terribly grateful it 
>>> didn't happen this weekend when I rode the 2015 JBK Haleiwa Metric Century 
>>> on my Quickbeam (and had a great time as documented in another email and 
>>> at: http://www.statrix.com/2015/04/2015_jbk_ride_report/)
>>>
>>> Anyway, I left work today, hopped on my bike and was going to run a few 
>>> errands and maybe put in an extra mile or two (and I do mean just a mile or 
>>> two - but still fun, eh?)
>>>
>>> I was at a light and when stood and pushed off when the light turned 
>>> green my foot sort of kept going to the ground. Luckily I didn't fall and 
>>> stopped, though it probably looked clumsy. I couldn't figure out how I'd 
>>> missed the pedal. 
>>>
>>> I hadn't. My Sugino XD2-QB double 40/32 175mm and come undone. 
>>>
>>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>>
>>> I didn't take an image in place. I got the hell off the road. :-)
>>>
>>> I bought the bike in December 2009 and have ridden the heck out of it. 
>>> I've also mostly been a lot heavier than I am today (also documented in 
>>> other emails around here). I've gone from 275 to 197, mostly since November 
>>> 2014. If you do the math, the crank mostly got me at my heaviest.
>>>
>>> If you look at the break it seems pretty clear it'd been a while coming. 
>>> There are definite differences from one side of the break to the other. As 
>>> I said, I'm really just grateful that it didn't happen on the century this 
>>> weekend, or in heaving traffic (could have too). It was pretty much a 
>>> non-event.
>>>
>>> For those who wonder, I have a Hunq that'll be ridden a bit more now. If 
>>> I'm annoyed with anything it's that I just, and I mean just, ordered some 
>>> new cork grips from Riv and now will have to order a new crank - twice the 
>>> shipping charge. If I'd have waited a day or two on the cork grips it could 
>>> all be one box. Sigh. Luxury problem.
>>>
>>> Anyway I ride the bike almost exclusively in 42x16 mode and figure I'll 
>>> get new chainrings and a new single speed cassette - all contingent on 
>>> taking the chain off and actually seeing what things look like - I might be 
>>> okay.
>>>
>>> As for the Hunq I just had a new dynohub wheel made for it and when I 
>>> got home instead of playing around the with disassembly the QB I put on the 
>>> new Eyc light, Top Line rear light, and wired it all up. Tomorrow I have a 
>>> late ride 'date' and until now only the QB had that much light going for 
>>> it. :-)
>>>
>>> Aloha, 
>>>
>>> Bob
>>>
>>> -- 
>>> Robert Harrison
>>> Honolulu, HI
>>> rfhar...@gmail.com
>>> statrix.com
>>> Wu Name: Tha Eurythmic King of Nowhere
>>>  
>>

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[RBW] Re: Broken Crank (Quickbeam)

[Ryan Fleming]

Yikes! That's disconcerting! I'm certainly glad you weren't hurt!
On Thursday, April 30, 2015 at 9:56:15 AM UTC-5, Statrixbob wrote:
>
> Oops, I just made the photos public. 
>
> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>
> Mea culpa and aloha!
>
> Bob
> On Apr 29, 2015 5:51 PM, "Robert F. Harrison"  > wrote:
>
>> First let me say...no injuries, no accident, didn't even fall over. 
>> Having said that, it was a bit unexpected and I'm terribly grateful it 
>> didn't happen this weekend when I rode the 2015 JBK Haleiwa Metric Century 
>> on my Quickbeam (and had a great time as documented in another email and 
>> at: http://www.statrix.com/2015/04/2015_jbk_ride_report/)
>>
>> Anyway, I left work today, hopped on my bike and was going to run a few 
>> errands and maybe put in an extra mile or two (and I do mean just a mile or 
>> two - but still fun, eh?)
>>
>> I was at a light and when stood and pushed off when the light turned 
>> green my foot sort of kept going to the ground. Luckily I didn't fall and 
>> stopped, though it probably looked clumsy. I couldn't figure out how I'd 
>> missed the pedal. 
>>
>> I hadn't. My Sugino XD2-QB double 40/32 175mm and come undone. 
>>
>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>
>> I didn't take an image in place. I got the hell off the road. :-)
>>
>> I bought the bike in December 2009 and have ridden the heck out of it. 
>> I've also mostly been a lot heavier than I am today (also documented in 
>> other emails around here). I've gone from 275 to 197, mostly since November 
>> 2014. If you do the math, the crank mostly got me at my heaviest.
>>
>> If you look at the break it seems pretty clear it'd been a while coming. 
>> There are definite differences from one side of the break to the other. As 
>> I said, I'm really just grateful that it didn't happen on the century this 
>> weekend, or in heaving traffic (could have too). It was pretty much a 
>> non-event.
>>
>> For those who wonder, I have a Hunq that'll be ridden a bit more now. If 
>> I'm annoyed with anything it's that I just, and I mean just, ordered some 
>> new cork grips from Riv and now will have to order a new crank - twice the 
>> shipping charge. If I'd have waited a day or two on the cork grips it could 
>> all be one box. Sigh. Luxury problem.
>>
>> Anyway I ride the bike almost exclusively in 42x16 mode and figure I'll 
>> get new chainrings and a new single speed cassette - all contingent on 
>> taking the chain off and actually seeing what things look like - I might be 
>> okay.
>>
>> As for the Hunq I just had a new dynohub wheel made for it and when I got 
>> home instead of playing around the with disassembly the QB I put on the new 
>> Eyc light, Top Line rear light, and wired it all up. Tomorrow I have a late 
>> ride 'date' and until now only the QB had that much light going for it. :-)
>>
>> Aloha, 
>>
>> Bob
>>
>> -- 
>> Robert Harrison
>> Honolulu, HI
>> rfhar...@gmail.com 
>> statrix.com
>> Wu Name: Tha Eurythmic King of Nowhere
>>  
>

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Philip Williamson]

I have older Shimano 600s with 39/42 rings on my Quickbeam.

Philip
www.biketinker.com 


On Thursday, April 30, 2015 at 9:10:10 AM UTC-7, Statrixbob wrote:
>
>
> On Thu, Apr 30, 2015 at 5:23 AM, Minh > 
> wrote:
>
>> well count yourself lucky that it happened at a pretty innocuous time, 
>> imagine if this had happened while bombing down a hill!!  and now consider 
>> replacement options
>>
>
> As far as replacement options go I haven't had time to really take a look 
> at everything yet. I really only ride in 40x16 so the only wear is likely 
> to be there so I may be able to just replace the crankset and have it as 
> is...or I can start getting creative.
>
> What are other folks running on their Quickbeam/Simpleones?
>
> Aloha
>
>
> -- 
> Robert Harrison
> Honolulu, HI
> rfhar...@gmail.com 
> statrix.com
> Wu Name: Tha Eurythmic King of Nowhere
>  

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Robert F. Harrison]

I don't have access to the bike (rode my Hunq to work) so I can't take a
look till tonight. I do not remember it being near a stamping, but I also
don't remember what I had for lunch yesterday. :-)

I'll check tonight.

Bob

On Thu, Apr 30, 2015 at 6:41 AM, Ron Mc  wrote:

> BUT
>
>
> 
>
> Was the crack coincident with a stamped marking in the crank arm?
>
>
> On Thursday, April 30, 2015 at 11:10:10 AM UTC-5, Statrixbob wrote:
>>
>>
>> On Thu, Apr 30, 2015 at 5:23 AM, Minh  wrote:
>>
>>> well count yourself lucky that it happened at a pretty innocuous time,
>>> imagine if this had happened while bombing down a hill!!  and now consider
>>> replacement options
>>>
>>
>> As far as replacement options go I haven't had time to really take a look
>> at everything yet. I really only ride in 40x16 so the only wear is likely
>> to be there so I may be able to just replace the crankset and have it as
>> is...or I can start getting creative.
>>
>> What are other folks running on their Quickbeam/Simpleones?
>>
>> Aloha
>>
>>
>> --
>> Robert Harrison
>> Honolulu, HI
>> rfhar...@gmail.com
>> statrix.com
>> Wu Name: Tha Eurythmic King of Nowhere
>>
>  --
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-- 
Robert Harrison
Honolulu, HI
rfharri...@gmail.com
statrix.com
Wu Name: Tha Eurythmic King of Nowhere

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Minh]

I'm constantly struggling between treating myself or using something good 
enough.  so i'm using the same model crank that you just broke!  

if you want to treat yourself i recently put on a White Industries crank 
that looks awesome.  
second hand i'm a big fan of the older suntour superbe pro cranks, but 
after your luck maybe a second hand crank is a bad idea



On Thursday, April 30, 2015 at 12:10:10 PM UTC-4, Statrixbob wrote:
>
>
> On Thu, Apr 30, 2015 at 5:23 AM, Minh > 
> wrote:
>
>> well count yourself lucky that it happened at a pretty innocuous time, 
>> imagine if this had happened while bombing down a hill!!  and now consider 
>> replacement options
>>
>
> As far as replacement options go I haven't had time to really take a look 
> at everything yet. I really only ride in 40x16 so the only wear is likely 
> to be there so I may be able to just replace the crankset and have it as 
> is...or I can start getting creative.
>
> What are other folks running on their Quickbeam/Simpleones?
>
> Aloha
>
>
> -- 
> Robert Harrison
> Honolulu, HI
> rfhar...@gmail.com 
> statrix.com
> Wu Name: Tha Eurythmic King of Nowhere
>  

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Ron Mc]

BUT



Was the crack coincident with a stamped marking in the crank arm?  


On Thursday, April 30, 2015 at 11:10:10 AM UTC-5, Statrixbob wrote:
>
>
> On Thu, Apr 30, 2015 at 5:23 AM, Minh > 
> wrote:
>
>> well count yourself lucky that it happened at a pretty innocuous time, 
>> imagine if this had happened while bombing down a hill!!  and now consider 
>> replacement options
>>
>
> As far as replacement options go I haven't had time to really take a look 
> at everything yet. I really only ride in 40x16 so the only wear is likely 
> to be there so I may be able to just replace the crankset and have it as 
> is...or I can start getting creative.
>
> What are other folks running on their Quickbeam/Simpleones?
>
> Aloha
>
>
> -- 
> Robert Harrison
> Honolulu, HI
> rfhar...@gmail.com 
> statrix.com
> Wu Name: Tha Eurythmic King of Nowhere
>  

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Robert F. Harrison]

On Thu, Apr 30, 2015 at 5:23 AM, Minh  wrote:

> well count yourself lucky that it happened at a pretty innocuous time,
> imagine if this had happened while bombing down a hill!!  and now consider
> replacement options
>

As far as replacement options go I haven't had time to really take a look
at everything yet. I really only ride in 40x16 so the only wear is likely
to be there so I may be able to just replace the crankset and have it as
is...or I can start getting creative.

What are other folks running on their Quickbeam/Simpleones?

Aloha


-- 
Robert Harrison
Honolulu, HI
rfharri...@gmail.com
statrix.com
Wu Name: Tha Eurythmic King of Nowhere

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Re: [RBW] Re: Broken Crank (Quickbeam)

[Robert F. Harrison]

As far as I know it's never been dropped onto the pedals. And as far as I
recall, the only time I've ever fallen over on that bike it was on the left
side, not the right, and it was (embarrassingly) while I was stopped and
tried to turn to talk with someone and got tangled and, well, never mind.
:-)

Aloha,

Bob

On Thu, Apr 30, 2015 at 5:19 AM, BSWP  wrote:

> I wonder if the crank had been subjected to a side force, like being
> dropped onto the pedal?
>
> On Thursday, April 30, 2015 at 8:04:23 AM UTC-7, Ron Mc wrote:
>>
>> that's a really strange place to break.  It cracked gradually from the
>> inside.  Was there any kind of stamped marking at the crack origin on the
>> inside edge?
>>
>> On Thursday, April 30, 2015 at 9:56:15 AM UTC-5, Statrixbob wrote:
>>>
>>> Oops, I just made the photos public.
>>>
>>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>>
>>> Mea culpa and aloha!
>>>
>>> Bob
>>>
>>>   --
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-- 
Robert Harrison
Honolulu, HI
rfharri...@gmail.com
statrix.com
Wu Name: Tha Eurythmic King of Nowhere

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[RBW] Re: Broken Crank (Quickbeam)

[Minh]

hmm agree with Ron, not the place i would've guessed for a break before 
seeing the pictures.   for a break like that, maybe it was it from the side 
and started to crack, crack, crack.  it's a pretty straight/clean break!

well count yourself lucky that it happened at a pretty innocuous time, 
imagine if this had happened while bombing down a hill!!  and now consider 
replacement options


On Thursday, April 30, 2015 at 11:04:23 AM UTC-4, Ron Mc wrote:
>
> that's a really strange place to break.  It cracked gradually from the 
> inside.  Was there any kind of stamped marking at the crack origin on the 
> inside edge?  
>
> On Thursday, April 30, 2015 at 9:56:15 AM UTC-5, Statrixbob wrote:
>>
>> Oops, I just made the photos public. 
>>
>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>
>> Mea culpa and aloha!
>>
>> Bob
>>
>>>  

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[RBW] Re: Broken Crank (Quickbeam)

[BSWP]

I wonder if the crank had been subjected to a side force, like being 
dropped onto the pedal? 

On Thursday, April 30, 2015 at 8:04:23 AM UTC-7, Ron Mc wrote:
>
> that's a really strange place to break.  It cracked gradually from the 
> inside.  Was there any kind of stamped marking at the crack origin on the 
> inside edge?  
>
> On Thursday, April 30, 2015 at 9:56:15 AM UTC-5, Statrixbob wrote:
>>
>> Oops, I just made the photos public. 
>>
>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>
>> Mea culpa and aloha!
>>
>> Bob
>>
>>  

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[RBW] Re: Broken Crank (Quickbeam)

[Ron Mc]

that's a really strange place to break.  It cracked gradually from the 
inside.  Was there any kind of stamped marking at the crack origin on the 
inside edge?  

On Thursday, April 30, 2015 at 9:56:15 AM UTC-5, Statrixbob wrote:
>
> Oops, I just made the photos public. 
>
> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>
> Mea culpa and aloha!
>
> Bob
> On Apr 29, 2015 5:51 PM, "Robert F. Harrison"  > wrote:
>
>> First let me say...no injuries, no accident, didn't even fall over. 
>> Having said that, it was a bit unexpected and I'm terribly grateful it 
>> didn't happen this weekend when I rode the 2015 JBK Haleiwa Metric Century 
>> on my Quickbeam (and had a great time as documented in another email and 
>> at: http://www.statrix.com/2015/04/2015_jbk_ride_report/)
>>
>> Anyway, I left work today, hopped on my bike and was going to run a few 
>> errands and maybe put in an extra mile or two (and I do mean just a mile or 
>> two - but still fun, eh?)
>>
>> I was at a light and when stood and pushed off when the light turned 
>> green my foot sort of kept going to the ground. Luckily I didn't fall and 
>> stopped, though it probably looked clumsy. I couldn't figure out how I'd 
>> missed the pedal. 
>>
>> I hadn't. My Sugino XD2-QB double 40/32 175mm and come undone. 
>>
>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>
>> I didn't take an image in place. I got the hell off the road. :-)
>>
>> I bought the bike in December 2009 and have ridden the heck out of it. 
>> I've also mostly been a lot heavier than I am today (also documented in 
>> other emails around here). I've gone from 275 to 197, mostly since November 
>> 2014. If you do the math, the crank mostly got me at my heaviest.
>>
>> If you look at the break it seems pretty clear it'd been a while coming. 
>> There are definite differences from one side of the break to the other. As 
>> I said, I'm really just grateful that it didn't happen on the century this 
>> weekend, or in heaving traffic (could have too). It was pretty much a 
>> non-event.
>>
>> For those who wonder, I have a Hunq that'll be ridden a bit more now. If 
>> I'm annoyed with anything it's that I just, and I mean just, ordered some 
>> new cork grips from Riv and now will have to order a new crank - twice the 
>> shipping charge. If I'd have waited a day or two on the cork grips it could 
>> all be one box. Sigh. Luxury problem.
>>
>> Anyway I ride the bike almost exclusively in 42x16 mode and figure I'll 
>> get new chainrings and a new single speed cassette - all contingent on 
>> taking the chain off and actually seeing what things look like - I might be 
>> okay.
>>
>> As for the Hunq I just had a new dynohub wheel made for it and when I got 
>> home instead of playing around the with disassembly the QB I put on the new 
>> Eyc light, Top Line rear light, and wired it all up. Tomorrow I have a late 
>> ride 'date' and until now only the QB had that much light going for it. :-)
>>
>> Aloha, 
>>
>> Bob
>>
>> -- 
>> Robert Harrison
>> Honolulu, HI
>> rfhar...@gmail.com 
>> statrix.com
>> Wu Name: Tha Eurythmic King of Nowhere
>>  
>

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[RBW] Re: Broken Crank (Quickbeam)

[Robert F. Harrison]

Oops, I just made the photos public.

https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/

Mea culpa and aloha!

Bob
On Apr 29, 2015 5:51 PM, "Robert F. Harrison"  wrote:

> First let me say...no injuries, no accident, didn't even fall over. Having
> said that, it was a bit unexpected and I'm terribly grateful it didn't
> happen this weekend when I rode the 2015 JBK Haleiwa Metric Century on my
> Quickbeam (and had a great time as documented in another email and at:
> http://www.statrix.com/2015/04/2015_jbk_ride_report/)
>
> Anyway, I left work today, hopped on my bike and was going to run a few
> errands and maybe put in an extra mile or two (and I do mean just a mile or
> two - but still fun, eh?)
>
> I was at a light and when stood and pushed off when the light turned green
> my foot sort of kept going to the ground. Luckily I didn't fall and
> stopped, though it probably looked clumsy. I couldn't figure out how I'd
> missed the pedal.
>
> I hadn't. My Sugino XD2-QB double 40/32 175mm and come undone.
>
> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>
> I didn't take an image in place. I got the hell off the road. :-)
>
> I bought the bike in December 2009 and have ridden the heck out of it.
> I've also mostly been a lot heavier than I am today (also documented in
> other emails around here). I've gone from 275 to 197, mostly since November
> 2014. If you do the math, the crank mostly got me at my heaviest.
>
> If you look at the break it seems pretty clear it'd been a while coming.
> There are definite differences from one side of the break to the other. As
> I said, I'm really just grateful that it didn't happen on the century this
> weekend, or in heaving traffic (could have too). It was pretty much a
> non-event.
>
> For those who wonder, I have a Hunq that'll be ridden a bit more now. If
> I'm annoyed with anything it's that I just, and I mean just, ordered some
> new cork grips from Riv and now will have to order a new crank - twice the
> shipping charge. If I'd have waited a day or two on the cork grips it could
> all be one box. Sigh. Luxury problem.
>
> Anyway I ride the bike almost exclusively in 42x16 mode and figure I'll
> get new chainrings and a new single speed cassette - all contingent on
> taking the chain off and actually seeing what things look like - I might be
> okay.
>
> As for the Hunq I just had a new dynohub wheel made for it and when I got
> home instead of playing around the with disassembly the QB I put on the new
> Eyc light, Top Line rear light, and wired it all up. Tomorrow I have a late
> ride 'date' and until now only the QB had that much light going for it. :-)
>
> Aloha,
>
> Bob
>
> --
> Robert Harrison
> Honolulu, HI
> rfharri...@gmail.com
> statrix.com
> Wu Name: Tha Eurythmic King of Nowhere
>

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[RBW] Re: Broken Crank (Quickbeam)

[Ron Mc]

the worst part is there is really no sensible way to ride after that - 
luckily when mine happened, we were on our way downtown to the Frankenbike 
meet.  Walked the bike 20 blocks and bought a $5 crank arm to get home.  

On Thursday, April 30, 2015 at 8:24:03 AM UTC-5, WETH wrote:
>
> Bob,
> I am glad it was not a more catastrophic experience for you.
> All the best,
> Erl
>
> On Wednesday, April 29, 2015 at 11:52:15 PM UTC-4, Statrixbob wrote:
>>
>> First let me say...no injuries, no accident, didn't even fall over. 
>> Having said that, it was a bit unexpected and I'm terribly grateful it 
>> didn't happen this weekend when I rode the 2015 JBK Haleiwa Metric Century 
>> on my Quickbeam (and had a great time as documented in another email and 
>> at: http://www.statrix.com/2015/04/2015_jbk_ride_report/)
>>
>> Anyway, I left work today, hopped on my bike and was going to run a few 
>> errands and maybe put in an extra mile or two (and I do mean just a mile or 
>> two - but still fun, eh?)
>>
>> I was at a light and when stood and pushed off when the light turned 
>> green my foot sort of kept going to the ground. Luckily I didn't fall and 
>> stopped, though it probably looked clumsy. I couldn't figure out how I'd 
>> missed the pedal. 
>>
>> I hadn't. My Sugino XD2-QB double 40/32 175mm and come undone. 
>>
>> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>>
>> I didn't take an image in place. I got the hell off the road. :-)
>>
>> I bought the bike in December 2009 and have ridden the heck out of it. 
>> I've also mostly been a lot heavier than I am today (also documented in 
>> other emails around here). I've gone from 275 to 197, mostly since November 
>> 2014. If you do the math, the crank mostly got me at my heaviest.
>>
>> If you look at the break it seems pretty clear it'd been a while coming. 
>> There are definite differences from one side of the break to the other. As 
>> I said, I'm really just grateful that it didn't happen on the century this 
>> weekend, or in heaving traffic (could have too). It was pretty much a 
>> non-event.
>>
>> For those who wonder, I have a Hunq that'll be ridden a bit more now. If 
>> I'm annoyed with anything it's that I just, and I mean just, ordered some 
>> new cork grips from Riv and now will have to order a new crank - twice the 
>> shipping charge. If I'd have waited a day or two on the cork grips it could 
>> all be one box. Sigh. Luxury problem.
>>
>> Anyway I ride the bike almost exclusively in 42x16 mode and figure I'll 
>> get new chainrings and a new single speed cassette - all contingent on 
>> taking the chain off and actually seeing what things look like - I might be 
>> okay.
>>
>> As for the Hunq I just had a new dynohub wheel made for it and when I got 
>> home instead of playing around the with disassembly the QB I put on the new 
>> Eyc light, Top Line rear light, and wired it all up. Tomorrow I have a late 
>> ride 'date' and until now only the QB had that much light going for it. :-)
>>
>> Aloha, 
>>
>> Bob
>>
>> -- 
>> Robert Harrison
>> Honolulu, HI
>> rfhar...@gmail.com
>> statrix.com
>> Wu Name: Tha Eurythmic King of Nowhere
>>  
>

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[RBW] Re: Broken Crank (Quickbeam)

[WETH]

Bob,
I am glad it was not a more catastrophic experience for you.
All the best,
Erl

On Wednesday, April 29, 2015 at 11:52:15 PM UTC-4, Statrixbob wrote:
>
> First let me say...no injuries, no accident, didn't even fall over. Having 
> said that, it was a bit unexpected and I'm terribly grateful it didn't 
> happen this weekend when I rode the 2015 JBK Haleiwa Metric Century on my 
> Quickbeam (and had a great time as documented in another email and at: 
> http://www.statrix.com/2015/04/2015_jbk_ride_report/)
>
> Anyway, I left work today, hopped on my bike and was going to run a few 
> errands and maybe put in an extra mile or two (and I do mean just a mile or 
> two - but still fun, eh?)
>
> I was at a light and when stood and pushed off when the light turned green 
> my foot sort of kept going to the ground. Luckily I didn't fall and 
> stopped, though it probably looked clumsy. I couldn't figure out how I'd 
> missed the pedal. 
>
> I hadn't. My Sugino XD2-QB double 40/32 175mm and come undone. 
>
> https://www.flickr.com/photos/mgps-bob/sets/72157652254822642/
>
> I didn't take an image in place. I got the hell off the road. :-)
>
> I bought the bike in December 2009 and have ridden the heck out of it. 
> I've also mostly been a lot heavier than I am today (also documented in 
> other emails around here). I've gone from 275 to 197, mostly since November 
> 2014. If you do the math, the crank mostly got me at my heaviest.
>
> If you look at the break it seems pretty clear it'd been a while coming. 
> There are definite differences from one side of the break to the other. As 
> I said, I'm really just grateful that it didn't happen on the century this 
> weekend, or in heaving traffic (could have too). It was pretty much a 
> non-event.
>
> For those who wonder, I have a Hunq that'll be ridden a bit more now. If 
> I'm annoyed with anything it's that I just, and I mean just, ordered some 
> new cork grips from Riv and now will have to order a new crank - twice the 
> shipping charge. If I'd have waited a day or two on the cork grips it could 
> all be one box. Sigh. Luxury problem.
>
> Anyway I ride the bike almost exclusively in 42x16 mode and figure I'll 
> get new chainrings and a new single speed cassette - all contingent on 
> taking the chain off and actually seeing what things look like - I might be 
> okay.
>
> As for the Hunq I just had a new dynohub wheel made for it and when I got 
> home instead of playing around the with disassembly the QB I put on the new 
> Eyc light, Top Line rear light, and wired it all up. Tomorrow I have a late 
> ride 'date' and until now only the QB had that much light going for it. :-)
>
> Aloha, 
>
> Bob
>
> -- 
> Robert Harrison
> Honolulu, HI
> rfhar...@gmail.com 
> statrix.com
> Wu Name: Tha Eurythmic King of Nowhere
>  

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[RBW] Re: Broken Crank (Quickbeam)

[Deacon Patrick]

I'm glad you're OK, Bob! That was very good timing of it to break given 
some of the alternatives. I can't see your photos on Flickr as they are 
private.

With abandon,
Patrick

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[RBW] Re: Broken Crank (Quickbeam)

[Ron Mc]

can't see your photos without a yahoo account.  I think we're dealing with 
the biggest limitation of a square taper crank.  The torque is going to 
gradually relax, and stresses become really high on the inside corner - the 
one that's loaded when you step on the crank.  I had the same thing happen 
on a used TA5 - broke when I was taking off from a stoplight.  

 
 
  




 

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