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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 10-06-07, 02:47 PM   #1
Burrito Eater
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Help me find a frame geometry experts!

I am looking for a new frame and am thinking about the IRO mark V. I have been riding a 61cm Pista Concept whose geometry can be found here:

http://www.bianchiusa.com/06_pista_concept.html

I also had a 59cm Steamroller whose geometry can be found here:

http://www.surlybikes.com/steamroller.html

The bike I am looking at is the 62cm IRO Mark V here:

http://www.irofixedgear.com/index.as...on=Custom&ID=4


Out of the two bikes I found the Concept to be much more comfortable then the Surly over long distances. As I see it, from looking at these charts the 62cm would be the way to go in the IRO. But the top tube on the Concept was shorter then the steamroller so now I am totally confused. I am 6'4 with a shorter torso and a 32'' true inseam. Staring at these numbers is making my brain hurt and I would like another opinion. Thanks for any help.
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Old 10-06-07, 03:03 PM   #2
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The IRO is 2 cm's shorter on the ST and .5 cm's longer on the TT than your Concept. You'll probably be fine.
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Old 10-06-07, 03:17 PM   #3
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Quote:
Originally Posted by Burrito Eater View Post
I am looking for a new frame and am thinking about the IRO mark V. I have been riding a 61cm Pista Concept whose geometry can be found here:

http://www.bianchiusa.com/06_pista_concept.html

I also had a 59cm Steamroller whose geometry can be found here:

http://www.surlybikes.com/steamroller.html

The bike I am looking at is the 62cm IRO Mark V here:

http://www.irofixedgear.com/index.as...on=Custom&ID=4


Out of the two bikes I found the Concept to be much more comfortable then the Surly over long distances. As I see it, from looking at these charts the 62cm would be the way to go in the IRO. But the top tube on the Concept was shorter then the steamroller so now I am totally confused. I am 6'4 with a shorter torso and a 32'' true inseam. Staring at these numbers is making my brain hurt and I would like another opinion. Thanks for any help.
How i understand true inseam is that it is actually larger/bigger than your pants inseam. If this is correct, you appear to have some very short legs for a 6'4" guy. Add that into your "short torso" and I'm stuck trying to figure out where all your height comes from. I'm 6'4" as well and am currently riding a 64cm old trek frame with a long ass top tube. i feel you pain in getting the fit right.
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Old 10-06-07, 03:27 PM   #4
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How i understand true inseam is that it is actually larger/bigger than your pants inseam. If this is correct, you appear to have some very short legs for a 6'4" guy. Add that into your "short torso" and I'm stuck trying to figure out where all your height comes from. I'm 6'4" as well and am currently riding a 64cm old trek frame with a long ass top tube. i feel you pain in getting the fit right.
Crap, I meant a 34 true inseam. shorter legs, longer torso I think. I completely f'ed up the OP.
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Old 10-08-07, 09:40 AM   #5
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Any other opinions? I am going to pull the trigger today maybe. Thanks!
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