Originally Posted by jimmy2020
will a 120/90 - 17 pirelli MT 21 work on the back wheel? I know a 130 works but I can only find a 120 width here in Costa Rica.
Also, will a 110 width work on the front?
Crap...In the title, I meant to tell you this is for a WR250X
Yes, up to 110/70-17 front
140/70-17 rear so 120 can be used with resultant lower traction, but it looks like you want to go off road if your getting a MT-21.