Having trouble finding 20x11x9 Holeshots or Razors and was told that 20x11x10 are just as good. I ride a lot of dirt trails with some big roots but not many rocks. I have the x9 Holeshots on my Warrior and really like them but need tires on the Z400. Anybody have an opinion on these sizes, they would be put on .190 Douglas's wheels.

 

If your stock tire size is 20x11.00-9 then you can't possibly use a 20x11.00-10. The reason being the final number in that series is your rim size, you can't use a tire meant for a 10 inch rim on a 9 inch rim that is one factor that must remain constant when replacing tires.

However if you are planning on ordering new rims when you order your tires then you can have them matched up when you buy them. In fact the 10s will be slightly more stable than the 9s since the height and width are the same you'll simply have .5 inch less sidewall, in essence making it a lower profile.

HTH