Originally Posted by EURO

After the length of your legs, this is the most important factor in bicycle fit.

It really is amazing that so few people know this. I think it's also probably the reason so many road cyclists complain of upper-body discomfort (hands, wrists, neck, shoulders, back etc).

Here's someone with average flexibility for a pro cyclist.



If you can do that, then you can have a seat tip to bar drop around 3 inches. If not, you're asking for some serious discomfort.