We've tested a lot of so-called "mud-tread" tires over the years, and with a few exceptions, they've usually tended to disappoint us when we've subjected them to some serious Bog Time. But not today. Take a good look---ten years after it first debuted, here's the brand-new version of the Goodyear Wrangler radial MT/R, a directional and asymmetrical tread pattern now also sporting Kevlar-reinforced sidewalls for increased puncture resistance. We just returned from a day testing these new treads out at Johnson Valley, where we pre-ran the King of the Hammers rock-racing course (not really---we're not that stupid. Well, actually, we are that stupid, but the Goodyear guys wisely kept us---and our stock Wrangler JK---away from Jack and Sledge. At least this once). We'll publish a full review of the new Goodyear in our August '09 dead-tree issue, but long story short: these are some versatile treads that---surprise!---work superbly in mud. Check out our "action" photo---you don't get the sides of a Jeep so dirty unless the tire can self-clean and fling goo expertly, and the new MT/R surpassed our expectations in both regards. It's also surefooted on rocks, and has acceptable highway manners to boot. The new tire goes on sale next month in 30 sizes ranging from LT235/85R16 to a whoppin' 42x14.50-17, so log onto Goodyear's Website for more info, or hit up your local Goodyear dealer for a look at the new treads.