Ok how should I start... I have a 7.2 fix I just replaced the tires to 700 X28 gator skins.. I mainly ride on streets sometimes on bike paths. The gearing to me ain't that great.. on long straights seemed so slow.. I'm paddlingso hard and here comes these road bike fly past me.. I think I need a smother gearing and need to upgrade. It seems to be fine Iin the Lower gears then Iit gets weird going up in gears... any advice 9th what gears to purchase.. and no I don't have to be as fast as a road ikeike