We like our e-Bikes, but our neighborhoodโs long, steep roads turned out to be quite a challenge for our bikesโ OEM brakes.
Both bikesโ original hydraulic disc brakes were 180mm rotors front and rear โ apparently not heat-treated โ and resin (organic) brake pads. All components were likely OEM entry-level grade.
I burned out my bikeโs original pads within 76 miles, and the semi-metallic replacement pads subsequently ate the non-heat-treated rear rotor. As described above, I replaced my bikeโs rotors, caliper adapters, and pads with heavy duty components, and the results are impressive, although probably still not ideal.
My wife separately concluded she was uncomfortable with her bikeโs brakes. I replaced her bikeโs 180mm non-heat-treated rotors with Hayes V8 203mm heat-treated models, installed new Shimano caliper adapters, upgraded her brake pads to Shimanoโs latest generation resin (organic) products, and I carefully aligned her calipers and pads properly with respect to the new rotors. ๐ฐ
It was a real challenge to find 203mm rotors with a โwideโ braking surface for โwideโ pads, as most large rotors are apparently feature โnarrowโ braking surfaces and use narrow pads in an effort to save weight. ๐
What a difference in braking performance! Happy wife, happy life!
Safe travels!
Jim / crewzer
New 203mm front disc brake rotor and pads on DWโs ~60 lbs. e-Bike:

New 203mm rear rotor and pads:

The rotor width issue:
