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Anone tried wobble-naught bike fitting?(3 posts)

Anone tried wobble-naught bike fitting?ParticleMan
Dec 28, 2002 8:16 AM
As above..anyone tried it? , as featured on
wonder if its really worth it...anyone tried it, any comparisons?

Thanks for the thoughts. A good New Year all
seems silly to me...C-40
Dec 29, 2002 6:22 AM
I've never been impressed with any fit system that relies on body measurements that are difficult to make with any accuracy.

A fit system that relies on body measurements can't take into account your optimum KOP position, which can only be determined by riding a bike for many miles of trial and error adjustment. Your optimum KOP may also change as you become a more experienced and conditioned rider. For example, I ride with my knee 2-3cm behind the pedal spindle. A first fitting would usually place the knee directly over the pedal. If you can't get a fitting that's accurate to better than 2cm, it's not of much value.

Measuring inseam accurately is the first and most important step. It's very easy to do if you have a bike with a horizontal top tube that has a standover height that's less than your inseam. Just block up the wheels of the bike until you get saddle-like crotch pressure when standing over the bike in bare feet. Measure from the floor to the top of the top tube to get an accurate inseam measurement.

The c-t frame size is usually 28 or 29cm less than your inseam measurement.

Determining your optimum seat tube angle, top tube length and stem length can also be done much more accurately on a bike that is close to the correct size or a special fitting bike.

Unless you have unusual proportioing that requires a custom frame, you will find that there are not large differences in the geometry of stock frames. It's rare to find a brand that requires much more than a 1cm change in saddle position or stem length to produce the same fit as another brand of the same size.
I like the Serrotta size Cycle nm.Ambishawn
Dec 30, 2002 9:08 PM