Thanks for the update, Edwin! 

FYI, I didn't install the metal sleeves I bought. I did spin a valve nut 
all the way down before installing the tube. It hasn't been that long, but 
no problem so far!

On Monday, December 14, 2015 at 9:00:59 AM UTC-8, Edwin W wrote:
>
> Update:
> Had another one of these valve base flats. Different rim (CR18), 38mm 
> Vittoria Randonneur tires.
> Tube: Kenda. 
> Replaced it with one of the Riv-sold Rubenas that looks like it has 
> reinforcement at the base. And I slipped an extra piece of tube over the 
> stem.
>
> Edwin
>
> On Friday, September 18, 2015 at 1:54:10 PM UTC-5, cyclot...@gmail.com 
> wrote:
>>
>> Third flat in two years from valve stem ripping out of the tube on my 
>> front Velocity Synergy rim. First two were catastrophic during rides, 
>> almost dumping me. The third time was this morning when I went out to the 
>> garage.
>>
>> Rim tape seems fine. No burrs on valve stem hole. I put an extra layer of 
>> Velox tape over to reinforce the area. Cut out a small 1X1cm of tube and 
>> slipped over the valve stem to reinforce that. I don't over-tighten the 
>> valve lock-nut and am leaving it off after this morning repair. 
>>
>> Running out of options here! Any suggestion? If not, is this possibly a 
>> warranty issue for defective rim? I'd hate to send it back and have 
>> Velocity write about me on their blog.
>>
>> -- 
>> Cheers,
>> David
>>
>> Member, Supreme Council of Cyberspace
>>
>> "it isn't a contest. Just enjoy the ride." - Seth Vidal
>>
>>
>>
>>

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