Is there a difference between the frt. and rear tires. I was looking at the Dunlop site earlier. The E3, MT90B16 frt. tire has 6/32" tread depth, max load 770lbs. @40psi. The MT90B16 rear has10/32" tread deph with a max load of 830lbs. @40psi. The MU90B16 has 11/32 td, with max load of 930lbs. @40 psi. I'm running the MU on the rear of my 06 RK, because when I bought them, I don't think they made an MT for the rear. As per manual I run 36psi frt and rear when solo. Any and all opinions and or advice will be greatly appreciated. Thanks in advance.