Some of you guys are killing me !!! I mean ,I'm more than sure I can spin my bike way over 100 rpm's but at a higher gear and my bike wont go 27 mph ... what I'm looking is to bring my cadence higher but I want to go faster too,I more than sure I will accomplish it no doubt.. but some of you can spin over 170 rpm's ?? I bet that bike will not be going really fast or if is going fast will be for 20 seconds..there are a lot of super man out there. Jezzzzzzzzzz !!