Pads: Heatsink red pads in cnc backings Time used: over 10 months Rim used: try all Grind: smooth, no grind Brake used: Magura HS-33 Previous used pads: magura orange, heatsink blue Review: The best braking pads on smooth rims in the dry. Now I must admit I use tar once in a while, and in the wet, no braking at all. They hardly wear out on a smooth rim. Very sharp bite in the dry. After nearly a year of abuse, the rubber popped out, now maybe just any pad will die after a year of abuse. That may be me giving them a hard time, but hey, there was still at least 4mm of rubber to use .