In a break from the 24/7 George Floyd coverage (I live in Minneapolis), I looked at my CC’s brakes in more detail. So far (a hundred miles or so), they work just fine with good power and modulation feel; they’re just annoyingly noisy especially in rolling to a stop, although recently the rear howls a bit when pressed lightly alerting all the dogs along the path.
I also have the modified Tektro caliper adapters with the front as described by Tom above with only its lower stanchion ground down. I think this was done so that the caliper tilt is fine tuned so that both pairs of pistons are equidistant from the edge of the rotors --- from the factory the all 4 front pads overhang the rotor by a mm or so and the front brake functions just fine this way except for the noise. To maybe mitigate this, I’ve installed a MDR-P (203mm) rotor paired with new green “Sport” compound pads so that the front matches Magura’s current ebike specification.
For the rear, I’ve replaced the black pads with “comfort” blues, kept the Storm HC rotor, but shimmed (with shaped M6 fender washers) the caliper to match the front’s pad overhang.
After another 50 miles or so, I’ll report on whether any of these mods helped or not.
Also my second TurnLife battery has performed very similarly to my first, i.e., pretty well.
Stay well and avoid the night time streets for now.
Update
During and after a 10 mile break-in ride, both the front and rear brakes with the changes described above have quieted down quite a bit with no more low frequency 20-100Hz judder. All that’s heard is the expected grinding/scraping brake noise with no odd harmonics. Feel remains good although as expected the power is down slightly but improved as the ride progressed with bedding in. On loose gravel the front and rear wheels can be locked up at will.
Note however I never noticed any front brake judder in the original configuration until about the 70 mile point so only time will tell.
Speaking of time and the Brooks B17 saddle, when I first got it I was surprised how hard it was for something made out of leather. 100 plus miles later it’s still hard as a rock and a bit slippery after treatment with their proprietary tallow stuff. But I do seem to be getting used to it the more I ride.
Stay Well