Frame From the side a fatbike looks pretty conventional but stand to the front or rear and you’ll see the stays and fork legs are much further apart than usual to make room for 65 to 100mm wide rims and 3.8 to 5in tyres.
Fatbikes have been a growth area but the next big trend may be towards semi-fat tyres—more specifically the 27.5+ size. Based on the middle wheel size, they will run 3.0 to 3.5 inch tyres along with appropriately wide rims.