I have a 2007 Roadstar Champion kit and run 40 front 23 back. You can't even see any ware in the back. Had to replace the front at 9000 miles due to cupping.Now have 19000 and no problems. Ken
I have a 2007 Roadstar Champion kit and run 40 front 23 back. You can't even see any ware in the back. Had to replace the front at 9000 miles due to cupping.Now have 19000 and no problems. Ken