nomdeplume
Active Member
Hi, I have recently bought a 6-speed Brompton with which I am delighted except the gearing is too high for me (at 70 yrs!). I would like to lower the gear to the same as my mountain bike on which the lowest gear is I believe 18''. Wheel diameter 26'' X chainwheel teeth, 22, divided by rear sprocket teeth 32
= 18''.
If I change the chainwheel to a smaller one, to lower the gearing,what number of teeth will I need?
= 18''.
If I change the chainwheel to a smaller one, to lower the gearing,what number of teeth will I need?