Motobecane gear ratio
Shamelessly ripped from here and translated using Babel Fish.
Thus I make some calculated all the ratio of reduction gearing of transmission which goes from 9 to 13 teeth for the pinion and 42 to 60 teeth for the crown and I classified these transmissions of shortest (acceleration) with longest (point).
And thanks to testimonies on the forum I could supplemented while indicating which transmissions can be drawn by a mob origin with a pot.
I really could not make for a kit because there were not enough testimonies thus for a coupleux engine one can thus put a rather long transmission and for an engine which takes many turns one needs a rather short transmission.
- 9/60= 0.15
- 9/58= 0.155172414
- 9/56= 0.160714286
- 9/54= 0.166666667
- 10/60= 0.166666667
- 10/58= 0.172413793
- 9/52= 0.173076923
- 10/56= 0.178571429
- 9/50= 0.18
- 10/54= 0.185185185
- 9/48= 0.1875
- 10/52= 0.192307692
- 9/46= 0.195652174
- 11/60= 0.183333333
- 11/58= 0.189655172
- 11/56= 0.196428571 good potato on origin + pot
- 10/50= 0.2
- 12/60= 0.2
- 11/54= 0.203703704 super potato and good point with standard kit G2 (100km/h)
- 9/44=0.204545455
- 12/58= 0.206896552
- 10/48= 0.208333333
- 11/52= 0.211538462 potato like origin on origin + pot
- 9/42= 0.214285714
- 12/56= 0.214285714
- 13/60= 0.216666667
- 10/46= 0.217391304
- 11/50= 0.22
- 12/54= 0.222222222
- 13/58= 0.224137931
- 10/44= 0.227272727
- 11/48= 0.229166667 good point with origin + pot and good potato with small kit50+pot
- 12/52= 0.230769231
- 13/56= 0.232142857
- 10/42= 0.238095238
- 11/46= 0.239130435
- 12/50= 0.24
- 13/54= 0.240740741
- 11/44= 0.25 good point origin + pot but long to launch
- 12/48= 0.25
- 13/52= 0.25
- 13/50= 0.26
- 12/46= 0.260869565
- 11/42= 0.261904762 too long for origin + pot
- 13/48= 0.270833333
- 12/44= 0.272727273
- 13/46= 0.282608696
- 12/42= 0.285714286
- 13/44= 0.295454545
- 13/42= 0.30952381
Calculation speed for a new transmission compared to old.
Reason of the new transmission * current speed with the old one/reason of the old transmission
Example: 0.24*100/0.25= 96km/h in broken up that made 12/50*100/(12/48) = 96km/h
The result is not exactly reality because the engine will not take forcing the same number of revolutions (for a shorter transmission speed will be higher in reality and conversely).