Don't know all the technical differences but I know front and rear are different. It think the front one is more rounded in the center and the rear is more flat in the center.
Front vs. Rear
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.
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I wonder why the difference in tread depth? Once I put mine on the lift I'll get a measurement on the tread depth. If I replace it. I'll go back with the MU90B16. I'm still trying to find the paper work when I had this set put on, so I can check the mileage.
Only thing I can think of is that the rear tire caries more load when a passenger is on and they generally wear fast than fronts do. But I'm just taking a guess at it.
There's probably more thread because they wear a lot faster. The load isn't distributed 50/50. There's more on the rear. Plus, it's the drive tire. I'd guess you wouldn't get a whole lot of wear out of a front tire on the back.
Dunlop also said dyno runs were really bad for bike tires.
What did they say about burn outs?? 
I suspect they love them due to increased sales.What did they say about burn outs??
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