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if someone can help me math this shit out i'd love you.
I currently have rims with a inner of 17.5 and have some trigger pro 38's on them. They barely fit and the little tire hair things rub on the fork but it works good enough. If I get some new wheels with 21 mm inner is it going to go wider or stay the same since the trigger pros were probably designed for a wider rim on the first place. ALSO I was thinking of getting some reneherse 38s, are those going to measure 38 on a 21 inner rim or should I play it safe and just get 35s. Basically I'm trying to squeeze as big as I can fit in my endurance bike that has 38 clearence since I moved recently and all I can ride on is retarded chunky gravel, not packed dirt, literally just rocks.pic related