can I use a different tread pattern on the front then the back like XL's on rear and
XZL's on the front and for the spare?
and I found this Quote Even though the XZL's are much easier to balance than other equivalent-sized tires, we still recommend balancing the XZL's with Equal Tire Balancer for best results. When combined with Equal, the XZL's give a very smooth ride. We use Equal on our own Michelin tires, and the result is far superior to any other balancing/tire combination we have tried. Furthermore, the XZL's will remain balanced for their entire useful life with Equal. The 9.00's take 8 oz. of Equal.