We learned about these pads through our sponsorship of AMA National MX Pro Weston Peick. Weston was having problems with fade and rapid pad wear using the stock HONDA pads and rotors. He upgraded to our oversize rotor and it got better, but on tracks like Glen Helen with the long downhills, he was still experiencing some minor fade. He got a tip from one of the team managers to try the AP Racing "ORR" compound pads as that is what most top riders were using. The AP Racing "ORR" compound is formulated specifically for use with oversize stainless steel rotors like ours. We have been using them on our own bikes and are extremely happy with the feel and performance. We have also been getting excellent feedback form customers on these pads and highly recommend them for all types of riding & racing. Fits all 2002-2010 CRF 250 & 450 models