Interesting! I have SLX w/ RT-66 rotors on my personal bike and they've been totally fine for 3 years. Riding back to back with a test bike that had XT w/ ice tech rotors I didn't notice any difference.
I received a new test bike last week with SLX w/ RT-66 rotors and felt the braking power was a bit lacking.
After reading your comment I went to look and the older ones (that work fine) are made in Japan while the new ones are made in China. The edges do look a little more rounded on the new ones.
However this still doesn't explain Dave's issue with the rotors since in the photo it shows JAPAN on his rotor.
May 23, 2023, 11:59 a.m. - Niels van Kampenhout
Interesting! I have SLX w/ RT-66 rotors on my personal bike and they've been totally fine for 3 years. Riding back to back with a test bike that had XT w/ ice tech rotors I didn't notice any difference. I received a new test bike last week with SLX w/ RT-66 rotors and felt the braking power was a bit lacking. After reading your comment I went to look and the older ones (that work fine) are made in Japan while the new ones are made in China. The edges do look a little more rounded on the new ones. However this still doesn't explain Dave's issue with the rotors since in the photo it shows JAPAN on his rotor.