I have a set of 8 paddle extremes, 20x10x10, 4x156 bolt pattern Douglas aluminum rims. Very good condition, used two weekends. 250+shipping, pm me for pics or more info. Located in Michigan
I ride the same type of trails. You will love the low end and mid, the power is instant. I just lost too much to end with them, we let them rip when we hit a dirt road on the trails. Went from beating my friend 6+ lengths to him by a bike. They are great in the tight stuff though.
If your not in a hurry I will have some available, putting in cub in a couple weeks. Have stock cylinders pro ported by grr, 64.5 bore,pistons, milled stock head, hot rod stock length crank. All have couple hours on them.