Upgrading brakes on a 1000W hub motor bike

#1
Hey!

I´m finally upgrading to hydraulic breaks. I´ve been searching around and i´m considering the shimano M315 mostly because of their low cost.

The set comes with 160 and 180mm rotors:

https://www.ebay.com/itm/SHIMANO-M3...hash=item2cd5290054:m:mkCT8DI4DU54UJT0WK1Hs2g

I worry that the rear caliper wont fit due to the size of the 1000W hub motor. Don´t know if placing the 180mm in the rear might do the trick or not. So I really needed some advice about this particular model.

Thank you.
 

JRA

Well-Known Member
#2
It is unclear if you are replacing cable activated disc brakes or rim brakes? If the bike already has disc brakes there is a good chance you could do with either size. Traditionally a larger rotor is placed on the front fork though than the rear but no reason they both can't be the same size.
 
#3
It is unclear if you are replacing cable activated disc brakes or rim brakes? If the bike already has disc brakes there is a good chance you could do with either size. Traditionally a larger rotor is placed on the front fork though than the rear but no reason they both can't be the same size.
Hi, I´m replacing the mechanical breaks and rotors.
I read around that not all calipers fit with a hub motor so I wanned to make sure before buying. Some have to install a bigger rotor or they manage to file the edge off the caliper.