Anyone who tells you never to brake on a discbrake rim is a victim. Bike rims never used to have machined brake tracks. There's some aluminium there (to hold the air in and keep the rim vaguely round and that). You can wear it down a bit. Use soft pads if you're worried.
Anyone who tells you never to brake on a discbrake rim is a victim. Bike rims never used to have machined brake tracks. There's some aluminium there (to hold the air in and keep the rim vaguely round and that). You can wear it down a bit. Use soft pads if you're worried.