I'm using magura mt5s on both the front and back wheels. both wheels use 203mm rotors. I can definitely slow down and stop but not at a fast enough rate. The regen is also partially just a science project I want to try out.
I currently have a mongoose envoy equipped with a bbshd and 52v battery. This bike is my daily driver and is often loaded up to 300 lbs (rider + cargo). The areas I ride in have many long hills so I want a rear hub motor for regen so I stop shredding my brakes. I'm looking for a decently...