For what it winds up being (for high level) riders.thisisatest wrote:HammerTime2 wrote:Whether or not KOPS is adhered to, upper vs. lower leg length is of paramount impact to setback.
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HammerTime2 wrote:For what it winds up being (for high level) riders.thisisatest wrote:HammerTime2 wrote:Whether or not KOPS is adhered to, upper vs. lower leg length is of paramount impact to setback.
I meant, the upper/lower leg ratio is of paramount impact to setback, why?
Ignoring KOPS, what does the leg ratio mean for fore-aft now? To adhere to any knee fore-aft for riders with different ratios is merely altering their weight distribution on the bike. Granted, the rider with the shorter thigh will have his hip go through a wider range of motion, but that in itself does not mandate a more forward position. Foot length and ankling would matter equally, but nobody ever considers that.
Awesome chart, btw. thanks. Now I know that if I ever have the opportunity to buy a used pro bike, it ought to be Jeremy Powers' bike!
Cavendish, on the other hand, is all over the place. I remember reading or hearing that he may even change his saddle height a centimeter or two between stages of a Grand Tour depending on the terrain.
Regardless kind of neat to see a range of some of the heights. Turns out I fall somewhat within the range being 5' 8'' or so and having a saddle height of 72.8cm. Now bear in mind I'm riding Speedplay and Bont so super low stack height
Cycling inseam: 81.82cm
Upper leg: 58.42cm
Lower leg: 53.34cm
Saddle height from BB c-t: 73cm
Setback (SMP Evo): 9.7cm
What can I say? I guess I can't average myself to a pro without the rest of their stats. According to my chart, I'd have to move my saddle forward 2.4cm. I'd be doing pushups on my handlebars with that kind of weight distribution.
AGW wrote:Here's an updated list with saddle height and some additional riders. Some riders are duplicated with different measurements from different seasons. I think that the % provides an excellent starting point for saddle adjustment for the racing/performance-oriented rider. I'm going to measure my setback and saddle height and see how it compares. As a person with unremarkable proportions, I'm guessing it will fall close to the average % regardless of upper/lower leg lengths.
Took this saddle height and setback data and did some trig to get the average angle of virtual seat tube. I use the assumption that the middle of the seat is 15cm back from the tip (which on most seats is about where riders sit, and about where the 'center' alignment of the rails are).
The angle came out at 72.98 degrees.
Which is kinda interesting, as this is the angle used by many road bikes as a standard.
djconnel wrote:AGW wrote:Here's an updated list with saddle height and some additional riders.
Can you post the data? (for example, CSV, SSV, TSV, etc)
It would be interesting to plot.
I've managed to export the xls as a CSV, then I can select one or all of those upon opening. Not sure which to post.
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