A new member of my bike club posted that she wants to buy a new road
bike. She doesn't have much experience on the road. So I suggested
some issues she ought to think about.
Now she returns saying that she is trying to decide between two Trek
carbon bikes, one of them a 47 cm and the other a 50
I recently bought my girlfriend a Soma San Marcos. She's about 5'4, and
the 51cm fits her pretty well. It has a 51cm top tube. It's available in
a 47 as well, which would probably fit your friend perfectly. The San
Marcos is the lightest current Riv, except for the Roadeo.
Plus, the color is
I'm confused. The Riv chart says the Soma San Marcos has a 55 cm top tube
for a 51 cm frame. Is that the actual top tube length c-c and effective top
tube is shorter? I'm trying to compare this bike:
Hi Anne,
The 51cm Soma San Marcos has a 55-cm effective top tube. With seat tube
angle of 71.5 degrees. (The 47cm San Marcos has 53.5-cm effective top tube
with seat tube angle of 71.5 degrees.)
The 47cm Trek Domane has a 50.9-cm effective top tube. However, the seat
tube angle is 74.6
Hang on a sec. The seat tube angle is the angle from seat tube to ground,
right? So a bigger angle should move the saddle forward and make reach
shorter, right? Seems like it would unweight the rear wheel, though.
On Thu, Jan 30, 2014 at 12:09 PM, Shoji Takahashi shoji.takaha...@gmail.com
Doesn't the handlebar height change effective reach? This makes it all more
important to talk to the folks at Rivendell. They can guide her based on PBH.
With abandon,
Patrick
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Correct-- angle between seat tube and the ground (i.e., 90 degrees is
vertical, and the Trek has a closer to vertical seat post than the San
Marcos).
The bigger angle BY ITSELF would bring the rider closer to the handlebars,
BUT the rider would [generally] move the saddle backward to get a
People of normal height seem not to have to worry about seat-tube angles!
For those of us who are height-challenged, it makes a lot of difference.
As Rivendell has noted since the beginning, it's very hard to make a small
bike with 700c wheels and a comfortable seat-tube angle. Most road
Thanks, Elizabeth. Excellent explanation.
This woman needs to go over to Rivendell and test ride some bikes. But I'm
pretty sure she won't. She'll follow the herd and buy a carbon bike that
only fits 25 cm tires, and has a steep seat tube that throws her forward.
Because weight.
Seems to me
What’s the standover on your Saluki, Liesl?
From: rbw-owners-bunch@googlegroups.com
[mailto:rbw-owners-bunch@googlegroups.com] On Behalf Of Liesl
Sent: Thursday, January 30, 2014 4:08 PM
To: rbw-owners-bunch@googlegroups.com
Subject: Re: [RBW] Suggest a small bike for a 5'2 woman
Liz, you're
Anne my friend
Stack and Reach are the numbers that allow you to make those comparisons.
Trek lists them directly. For Riv we have to calculate them
Trek: Stack = 52.7cm Reach = 36.4cm
San Marcos 51: Stack = 53.9cm Reach = 38.8cm
San Marcos 47: Stack = 50.0cm Reach = 38.6cm
The reach
Possibly, Anne, but thanks to you she will at least know there is an option
less, though more happily, traveled.
With abandon,
Patrick
On Thursday, January 30, 2014 2:07:24 PM UTC-7, Anne Paulson wrote:
Thanks, Elizabeth. Excellent explanation.
This woman needs to go over to Rivendell and
I haven't fit checked 38mm tires on the San Marcos yet, but I intend to
with my Lierre-clad wheels.
On Thu, Jan 30, 2014 at 3:53 PM, Deacon Patrick lamontg...@mac.com wrote:
Possibly, Anne, but thanks to you she will at least know there is an
option less, though more happily, traveled.
With
Here's Jimmy's graphic to explain the principle of how a shorter top tube
can feel longer in GIF form.
http://www.biketinker.com/2011/bike-resources/bike-fit-geometry-relationships/
Philip
www.biketinker.com
On Thursday, January 30, 2014 12:40:49 PM UTC-8, Shoji Takahashi wrote:
Correct--
Hi Anne,
I'm 5'2 (and 1/2 or so). Somewhat shorter legs; longer torso than is
standard for women, I suspect. I've found that road bikes with effective
top tubes between 50.5cm and 52cm can all work. Anything longer than that,
and no...
I had a 48cm Sam. Unquestionably too big. It had a 54cm
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