Lately I’ve come to prefer my 24" muni to my 27.5 quax rgb, so I’m thinking I’ll do some experimenting with fatter tires to see how I like them. With a 27.5x3 High Roller 2 on the wheel right now I have about 1/2 inch of clearance between the tire and the sides of the frame. So I think I can safely go as wide as 3.6". 3.8" or 4" might be possible, but would be pushing my luck. Quax rates the rgb frame for a maximum width of 3.25", but that obviously leaves some extra clearance.
If you’ve ever run a fatter tire on a quax rgb, how did it go? Also if you’ve had any experience, good or bad, with 27.5" tires between 3.25 and 3.8 inches what were they?