Hi folks I run 22x10x11 Maxxis Razor's on the back and Kenda XCF 22x7x10 on the front. This gives the quad a better ballanced feel and also looks in proportion the XCF runs better in the ruts and rough stuff than a 21. I am told Wayne Matlock uses 23 up front. I have ridden a 700xx with the ITP converson to 10inch rims and did not like it, it was harder to turn and did not slide as well, as the Maxxis runs a lot shorter side wall. With the 10inch the quad kind goes back to not wanting to turn and generates to much grip plus the ITP are a massive tyre in 22x11x10 and makes the quad to wide.
Regards Overlord