Originally Posted by
clink83
BS. All ratios for gears mean (First input): (second imput) .Its the standard for any ratio of gearing. You buy a 4.11:1 rear end gear anywhere in the world, and you are getting a gear that will turn the wheels one time for every 4.11 revolutions of the driveshaft.
3:1= three turns of the crank, one turn of rear sprocket
1:3(what he described) is one turn of the crank, 3 turns of the rear sprocket. That kind of gearing would be impossible to ride. Even a road bike triple with a 30t front and 23t rear is only a 1.4:1 gear ratio, and thats impossible to spin unless your going up a steep road.
Maybe you are correct that there is a defacto standard in the engineering community for input gears and output gears. But you are still arguing semantics. It is a ratio between two numbers.
1 turn of the wheels : 4.11 turn of the driveshaft
and
4.11 turn of the driveshaft : 1 turn of the wheels
are mathematically identical.
Originally Posted by
clink83
also, any math student or professor could tell you that 1:3 and 3:1 are NOT the same.
Do you have a math degree? Because I do.