I just bought a wheel & tire kit for my 03 660 raptor. I has the OE frt & rear sprockets. 13 Frt & 38 rear, I think. What kind of change can I expect by moving from 20X10X9 rear to 22X11X10?

 

More of a dog off the line......but more top end......it will feel like a little less power to the ground at slower speeds.........Throw in some sprockets and you could make up for it

 

You will also get a little smoother ride with the bigger tires, also more ground clearance.

 

I run 22's in the rear on my Raptor. The taller tires make a HUGE difference in riding in the woods. I don't get hung up nearly as much. I'll never go back.

The taller tire did make the bike run a bit too fast in the lower gears, so you may want to drop 1 tooth on the front sprocket to help compensate.