I noticed this tire wear pattern on my front tire. The tire is a Michelin Macadam 50, rear bias, mounted in reverse direction, on a 99 I/S trike. Tire has 26,453 miles on it with 4/32" tread left. The wear is even side to side, (same depth at both edges of the contact patch) with no cupping. Any thoughts as to why the wear pattern is offset to the right of center? TIA. Stan