Keep in mind everyone is different and no numbers can peg you down as a fact (which is why economists are not paid more) - I am short of the heel extension thing and have my saddle a good 3 cm below my recommended height... it might be due to the fact that I like to spin a lot.... anyone want to do math and tell me what my cadence (cyclometer is broken) is when I go 21mph on 42x18 - thats 63 gear inches.