Originally Posted by eMwolB
Is there a chart or formula to figure out gear ratios, etc...I feel like I'm in trig...or was it calc??? - where's my abacus?
Do a search for 'Sheldon Brown's Bicycle Gear Calculator'. He's got a page you can enter wheel diameter, tire size, crank length, chain ring and sprocket size and it computes gear inches.
DanO