IRO group buy: howto make it more aggresive
06-28-07, 08:09 PM
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Originally Posted by zacked
This is the important part of this thread. If you want the bike to handle more quickly, you want a fork with more offset, not less.
06-28-07, 11:45 PM
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I thought the iro frame was true track geometry? What makes it not and what is there that is in this price range?
06-29-07, 07:01 AM
#28
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Originally Posted by Hopetoditchcar
I thought the iro frame was true track geometry? What makes it not and what is there that is in this price range?
06-29-07, 07:51 AM
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Originally Posted by Hopetoditchcar
some bikes are listed as compact geometry, is this lessa gresive then track geometry?
06-29-07, 08:45 PM
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I'm not convinced that a steep ht or short chainstays significantly help in traffic. I was just looking at this post on velonews. (see https://www.velonews.com/phorum3/read...=93284&t=93269 )
Is the typical street fixer's interest in "aggressive geometry" (e.g. forks with less rake (?)) just aesthetic at best, or is there something more to it? What do you really gain from less trail, shorter chainstays etc? Dave Moulton says track bikes have steep hts mainly to handle best under g's in the banks. what else do you get?
Originally Posted by Mark McM
Date: 06-01-05 10:25
"For example, if you had a touring bike geometry and took it to a criterium,
you probably literally wouldn't make the turns. "
This is not only a gross exageration, it is entirely inaccurate. Frame geometry can affect the feel and feedback of a bike, but it in no way affects how sharp a bike can turn at anything above a walking pace.
A bicycle is much lighter than its rider, so it doesn't take much force to maneuver a bike (especially at the relatively low speeds that they travel), so a touring bike can easily be leaned over into a sharp turn. Bicycles also have a relatively short wheelbase, so even a touring bike has a short wheelbase compared to its turning radius. And how do account for mountain bikes, which often need to make sharper radius turns than a road bike, and yet has a more "relaxed" geometry than most road touring bikes (longer wheelbase, slacker head angle, shorter fork offset)? No, it is not the geometry of the bike that limits its turning radius. How sharp a bike can turn (assuming reasonably smooth pavement) is limited by the skill of the rider and the traction of the tires, not on the geometry of the frame.
There are a variety of reasons that criterium bikes have the geometries they do, but being able to make sharp turns is not one of them.
"For example, if you had a touring bike geometry and took it to a criterium,
you probably literally wouldn't make the turns. "
This is not only a gross exageration, it is entirely inaccurate. Frame geometry can affect the feel and feedback of a bike, but it in no way affects how sharp a bike can turn at anything above a walking pace.
A bicycle is much lighter than its rider, so it doesn't take much force to maneuver a bike (especially at the relatively low speeds that they travel), so a touring bike can easily be leaned over into a sharp turn. Bicycles also have a relatively short wheelbase, so even a touring bike has a short wheelbase compared to its turning radius. And how do account for mountain bikes, which often need to make sharper radius turns than a road bike, and yet has a more "relaxed" geometry than most road touring bikes (longer wheelbase, slacker head angle, shorter fork offset)? No, it is not the geometry of the bike that limits its turning radius. How sharp a bike can turn (assuming reasonably smooth pavement) is limited by the skill of the rider and the traction of the tires, not on the geometry of the frame.
There are a variety of reasons that criterium bikes have the geometries they do, but being able to make sharp turns is not one of them.
Last edited by mander; 06-29-07 at 09:29 PM.
