have the new mt drag radial and used on stock wheels at 15 psi and had 1.55 60. desided to put on my tens with same pressure and all i can get is 1.65 or worse and cant leave high on stall. tried all the way down to 12 psi did not change any ideas on these tires, im about ready to put back on the stock rims. i did install a hybrid boost controller so the boost does senn quicker, but it should still hook.