I had read somewhere that the max brake size on the QR20s is 180mm, I had fitted a 200mm, so it's probably a good job that I've not riden it much. I decided to replace the no. 8 caliper with a no. 3 caliper. I thought I had a fully bled set ready to go but when I put it on there was no bite and the hose was way too long, and that's a job for another day.