Apparently nobody knows except John (dd4h). Private message John and ask. It's probably how he cuts the inner edge of the wheel on an angle. That would be my guess.
I figured with the "TM" near the name of the wheels that the answers would come flooding in. It must be quite a secret so I won't pry. Your version sounds good and logical.
Apparently nobody knows except John (dd4h). Private message John and ask. It's probably how he cuts the inner edge of the wheel on an angle. That would be my guess.