Originally Posted by
Toadster
I realize the 11x32 rear on the old bike will be more beneficial on the hills - but how does the ratio of the 50/34 work in conjunction on the new bike in comparison?
still trying to figure out all these ratios/teeth, etc...
For comparing you don't even need to figure gear inches; it's an extra step. Just use a ratio to figure how many times the back wheel turns each crank revolution.
for example with the granny on the old bike: (front gear/back gear) 28/32= .875
with the new bike: 34/28= 1.2
That's 1/3 revolutions more, so that much harder.