frame material and pedal groove
01-14-05, 01:47 PM
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frame material and pedal groove
so I've read that frame material can affect your stroke, rhythm, what have ya.
how do the various materials interact in this regard? I assume this has something to do with how stiff the frame is around the BB?
how do the various materials interact in this regard? I assume this has something to do with how stiff the frame is around the BB?
01-14-05, 02:54 PM
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UM...who said this? I have an old steel frame and a new (ish) carbon frame and I pedal them both the same....
01-14-05, 03:04 PM
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good thread. it's not the material so much as it is the built-in flex. it depends on how much deflection there is and how fast it's happening. if you happen to pedal in such a way that the rebound works to your advantage, then it would obviously help, but if not, then it probably wouldn't help at all and even be detrimental. depends on the rider/frame combo.
that might make one wonder if there is a test you could do to help create a "personalized flex" frame that would allow someone to take advantage of it(yes, i've thought about this before). as tuneable as it is for vertical compliance, carbon would be the perfect material for that. maybe we'll see that offered by a custom company one day, but as it is, that's why they try to make the BB area as stiff as possible. that way there's no real give or take.
that might make one wonder if there is a test you could do to help create a "personalized flex" frame that would allow someone to take advantage of it(yes, i've thought about this before). as tuneable as it is for vertical compliance, carbon would be the perfect material for that. maybe we'll see that offered by a custom company one day, but as it is, that's why they try to make the BB area as stiff as possible. that way there's no real give or take.
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01-14-05, 03:16 PM
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Originally Posted by dog hair
...but as it is, that's why they try to make the BB area as stiff as possible. that way there's no real give or take.
So there's no retail frame material or design that is better for newbies to help them get their pedal stroke groovin'?
And this deflection isn't typically considered on higher end bikes either since it's so personal and there's no easy way to measure it?
01-14-05, 03:28 PM
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no...
roughly translated, my post means that your guess is as good as mine(since i don't know what goes into all frame designs), but wouldn't it be neat if there was a way to calculate certain horizontal flex and tune it to work to your advantage?
honda has done this with motorcycle frame design. they call it "tuned flex"
roughly translated, my post means that your guess is as good as mine(since i don't know what goes into all frame designs), but wouldn't it be neat if there was a way to calculate certain horizontal flex and tune it to work to your advantage?
honda has done this with motorcycle frame design. they call it "tuned flex"
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01-14-05, 03:45 PM
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Originally Posted by LordOpie
so you're saying the average retail bike is designed with as stiff a BB as possible?
So there's no retail frame material or design that is better for newbies to help them get their pedal stroke groovin'?
And this deflection isn't typically considered on higher end bikes either since it's so personal and there's no easy way to measure it?
So there's no retail frame material or design that is better for newbies to help them get their pedal stroke groovin'?
And this deflection isn't typically considered on higher end bikes either since it's so personal and there's no easy way to measure it?
If what your saying is" Is this something to consider for a newbie buying a bike", the answer is no.
