I bought 15x8 Crager rims. What width tire should be used with a 8" wide rim?

 

Well that is kinda hard to say, how big radius wise are you looking at for tires?

 

33-34-35 I havn't decided yet.

 

and just what are these 33's going to be riding under?

as for width...........stick with an 11"

 

yeah, tall skinny tires will ride like complete crap. So I would also say 11" would be a good size.

 

thought most 33" tires and up were 12.5" wide

 

Most tires are but you can get skinny ones like 33x10.50 and 32x11.50. Good for cutting thru mud, less rolling resistance. I thought about getting a set like that on some spare wheels for offroading alone. On 16 inch rims alot of people run 265/75 tires which are about 10.4 wide. You should be able to do the same with 15's.

But on 8 inch wide rims, some people do run a 12.50 width tire. But they tend to wear uneven and have some problems. A general rule of thumb I always heard was not to run tires more than 3 inches wider than the rims on a DD. Unless it's just a offroad machine only or a special situation like a drag car.