Fat tyre kits are built on wide MTX rims for 4" tyres, for fat bikes used on sand, snow and soft trails. Both kits are high power (1500W to 4000W) and for private land only in the UK.
Will it fit? Fat bikes use wider rear spacing than standard bikes: check whether your frame is 175 mm or 190 mm and match it to the dropout width on the kit listing, and confirm the tyre width you run. Disc brakes are required. Our fat tyre conversion guide explains spacing, tyre pressure and battery placement on a fat frame.