We like our e-Bikes, but our neighborhoodβs long, steep roads turned out to be quite a challenge for our bikesβ OEM brakes.
Both bikesβ original hydraulic disc brakes were 180mm rotors front and rear β apparently not heat-treated β and resin (organic) brake pads. All components were likely OEM entry-level grade.
I burned out my bikeβs 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 bikeβs 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 bikeβs brakes. I replaced her bikeβs 180mm non-heat-treated rotors with Hayes V8 203mm heat-treated models, installed new Shimano caliper adapters, upgraded her brake pads to Shimanoβs latest generation resin (organic) products, and I carefully aligned her calipers and pads properly with respect to the new rotors. π°
It was a real challenge to find 203mm rotors with a βwideβ braking surface for βwideβ pads, as most large rotors are apparently feature βnarrowβ braking surfaces and use narrow pads in an effort to save weight. π
What a difference in braking performance! Happy wife, happy life!
Safe travels!
Jim / crewzer
New 203mm front disc brake rotor and pads on DWβs ~60 lbs. e-Bike:

New 203mm rear rotor and pads:

The rotor width issue:
