TOPIC:

I curently have a 4.50-18 on the rear of my 77 kz 750 twin! I was wondering if anyone could help me transfer it over to a newer metric size?

The metric size of a 4.50-18 would be 120/90-18 I believe. I'm not 100% sure but I believe that's right.

Yeah, that's a skinny rim on the back of the 750 twins, I don't think I would go any larger than a 120/18.

For some reason, every 750 twin (running) that I have had so far had 130/90/16 on the rear.

My 79 had Morris Mags with a 16" rear, and 80-83 have 16" rears stock.

This thread belongs in the "chassis" forum where you posted the same question. PLEASE don't multiple post the same question. This thread is locked and will be deleted in a day or two.