XC is usually somewhere between 22mm and 26mm (outside) which is about right if you're running 1.3"-2" tyres.
I've got a Halo SAS which is 36mm, it's pretty comedy but I've not bent it and the spokes are still nicely tensioned.
I don't know how a different width rim affects a tyre. It would be nice to find out. I'm guessing a different tyre with a stiffer carcass would react differently to something like a Kojac
XC is usually somewhere between 22mm and 26mm (outside) which is about right if you're running 1.3"-2" tyres.
I've got a Halo SAS which is 36mm, it's pretty comedy but I've not bent it and the spokes are still nicely tensioned.
I don't know how a different width rim affects a tyre. It would be nice to find out. I'm guessing a different tyre with a stiffer carcass would react differently to something like a Kojac