I’ve got a set of Alpkit Rumpus which at £199 for the set is a steal. They are obviously made to a price but they run OK (nothing really to compare them with though) 45mm internal rim width. Bridger 3.0″ on the front, Trailblazer 2.8″ on the back. The set I have is standard (whatever that means these days) 100mm front, 135mm rear. They come with axle converters for both 15mm and QR.

I’ve no idea of how long the bearings in the Alpkit hubs will last, I’ve only done around 400Km on them so far so it’s early days.

I reckon wheels, tyres, and all the bits cost about £340 all in.

If you can only fit in a “small” B+ tyre then be prepared for a drop in BB height. Of course, this might not bother you.

Check for tyre clearance in your forks too. Some models narrow exactly where you don’t want them to.

Rear tyre width will also be limited by your chainset.

The nobby nics on my Scott have underwhelmed me. I don’t see the advantage when fitted to a full suss and both have punctured badly with tread blocks almost pulling out of the carcass

is this on your really heavy, modified e-bike?