just out of interest, the TS185B/C from 1977/78 had alloy rims as standard in the 1.85 width, These rims run the small lip and are not the same as the earlier rims on the TM's but still lace up ok. The '76/'77 TS250 and TS400 also sported alloy rims and the RL250's uses TM125 wheels front and rear.