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354 Posts
I got a bike fit today, and my fit has changed quite a bit from my last. First off, the fitter recommended that I move the saddle forward, to within 1cm behind the pedal spindle. It was at least 1.5 cm from the KOPS position (rearward). Second, he noted that I am *VERY* inflexible: I only have a 65 degree extension ability when comparing the angle of my lower leg to the upper, when extended while on my back. Also, I can't bring my leg more than 70 degrees from flat (again while on my back) whereas 90 degrees would mean the leg was perpindicular to the ground. Therefore, he told me to start at a femur-tib/fib angle (with foot at approximately 5:30 in the pedal stroke, relaxed) of 35 degrees (he said the typical numbers are more like 25-32 degrees, but I can't get there until I increase flexibility).
Anyways, what all of this means is this: I currently have my seat slammed all the way forward on a Zero-setback Thomson post, and am about 5mm behind KOPS. He recommends raising my seat 2mm per week, and 8mm of increase will put me about 27 degrees on my femur-tib/fib angle, therefore increasing my power as I become more flexible.
The problem is this: As I raise the seat 2mm, I need to move it forward 1mm if I want to keep the same position relative to the spindle, correct? So, I will need to get some sort of triathalon post with a set-foward position (because currently I am as far forward with the seat as allowed)? Is this weird-it doesn't sound right. I have never seen a standard road bike with a set-forward position-most of the bikes I see of racers have alot of setback (I am guessing at least 3cm behind the KOPS position). Maybe I just have a super-long tib/fib and short femur. Or maybe something else is going on?
Anyways, what all of this means is this: I currently have my seat slammed all the way forward on a Zero-setback Thomson post, and am about 5mm behind KOPS. He recommends raising my seat 2mm per week, and 8mm of increase will put me about 27 degrees on my femur-tib/fib angle, therefore increasing my power as I become more flexible.
The problem is this: As I raise the seat 2mm, I need to move it forward 1mm if I want to keep the same position relative to the spindle, correct? So, I will need to get some sort of triathalon post with a set-foward position (because currently I am as far forward with the seat as allowed)? Is this weird-it doesn't sound right. I have never seen a standard road bike with a set-forward position-most of the bikes I see of racers have alot of setback (I am guessing at least 3cm behind the KOPS position). Maybe I just have a super-long tib/fib and short femur. Or maybe something else is going on?