Combining front and rear gears in cycling. Results?
elkynben
Question:
Asked by elkynben - 2 answers - 3 years 22 weeks ago
Combining front and rear gears in cycling. Results?
In a road bike with the same crank length, which differences would I expect by cycling in a plain circuit with the following front and rear gears?
50/11
34/7
I ask this due to triathlon purposes, lack of leg power/strength and high cadence preferences -for glycogen saving- (I run at 180-210 steps per minute). I read on this web about, but need for your opinion:
http://www.sheldonbrown.com/gain.html
Well, It seems there are not 7T cassettes, which is the minimum T-number I find? 11T?
I will go for an outer front 44t chainring, which means that when riding with 14t (rear):
0.7m x 3.1416 x 44t/14t = 6.9 m
At 110 rpm during 1 hour: 45 km/h
Differently, with outer front 50t chainring and 14t(rear):
0.7 x 3.1416 x 50t/14t = 7.8 m
but a higher load per pedal stroke on the knee calls for lower cadence, say 90-100 rpm, and during 1 hour: 42-47 km/h, with heavy legs for runnning!.
well, I think the bike must fulfill for each person and sport.