Think this is my biggest change of getting a solution on my problem. First of all, I have a CB350 twin from 1969. I about to swap the fork on the 350 to a fork from a CB500 to get the front disc brake setup. On this 18" rim I know I can fit a 4.00 Firestone Vintage tire (have that setup on my...

Ok... first time on a forum ever. First time building ripping apart a bike and building it ever... I want to put some firestone deluxe champions on this bad boy, but they only make 3.50-18... the front rim fits a 3.00-18. Firestone doesnt make that wheel in a 3.00. Can i use a 3.50 for the...