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Ever had a bike fit formula say your seat was too high?(7 posts)

Ever had a bike fit formula say your seat was too high?Alex-in-Evanston
Jul 18, 2002 6:31 AM
I've been messing arouns with the Wrench Science bike fit guide and found it pretty well put together.

Strange thing, it tells me to lower my saddle by an inch and a half. I tried it last night and felt like I was squatting on the crapper.

Just curious if conventional wisdom has ever told you that your comfy riding position was incorrect.

I've fooled around with some of those formulas. They of coursebill
Jul 18, 2002 6:52 AM
depend on the accuracy of the measurements going in, they also may give numbers for a particular saddle design that you don't happen to have. Add to this not only that the formulas that I"ve seen tend to give a range but they also depend on where you measure from on your saddle, and you realize that you can't read too much into them even before you get into whether your physiology is just different, anyway (although I believe that we all are a lot more adaptive than these formulas, any formula, allows).
The formula still encouraged me to try lowering my saddle from where it had been fit professionally. I'm happier a little lower; not only do I feel that I use more of my leg, but crotch numbness on extended rides has disappeared.
Conventional wisdom, Wrench Sciencegs6769
Jul 18, 2002 7:01 AM
Not saddle height. Though the rule of thumb that your bars should block your view of your front hub when in the drops doesn't work for me. I feel quite comfy with a clear view of the hub, and cramped when it's obscured. I'm all arms and legs and like to stretch out pretty full on.

Speaking of Wrench Science, ain't it a great place to goof around? Many a drooly lunch hour can be frittered away.
re: Ever had a bike fit formula say your seat was too high?jrm
Jul 18, 2002 7:05 AM
My knees tend to tell me if my saddle is too high or low. I can also tell from muscle soreness.
Jul 18, 2002 7:54 AM
I would say that either your inseam measurement is wrong, or the formula was wrong.

Although standard formulas can't take into account the distance from the pedal spindle centerline to the sole of the shoe, it only varies about 1cm. It would be rare to find more than 1-2cm of error.

Using the formula .883 times inseam yields a 73.3cm saddle height for my 83cm inseam. This is quite close to what I use.
Not's a GUIDE, not a lawcory
Jul 18, 2002 8:33 AM
There are subtle differences in all of us, and some not-so-subtle ones. Seems to me it's a good idea to use those formulas as a starting point, and expect to make adjustments to suit your body. I know I'm more comfortable and faster, for instance, when I raise the bars a little from the position the formula says I need.
Understood, but an inch and a half is a huge difference.Alex-in-Evanston
Jul 18, 2002 8:54 AM
I also understand the GIGO factor. My measurements were done as accurately as could be asked.

Interesting, nothing more.