I've had multiple sets of these Pirelli MT 21 tires on my dual sport bikes over many years. They're aggressive, bite hard, are good in sand in the desert, and have very strong sidewalls. I ride mostly dirt, but need DOT approved tires to be highway legal. IMO these tires are as good as full-on dirt tires off-road. They're a bit more money but I'll definitely keep buying them!
Put these on my WR250R for more street use. Road grip is great the is the second time of put these on a bike and I think the road feel and grip is amazing for a dual sport tire. I have not been off road with them but on flat dirt roads they are fine.
Although what drew me first to this tire was the price point, then the reviews, I purchased front and rear. Big mistake, don't believe the fluff, the offset edge lugs are something to be desired causing an unstable lean angle. (Also keep in mind the casing is a lot narrower then other manufactures) Third turn and down I went with a slow layover. Air adjustment, riding adjustment and 4hrs later I decided to burn them off on the street and chalk it up to another bad purchase. Ok bang-for the buck but spend $40.00 more and choose something else.
Not impressed, combined with the front off set side lug pattern they are extremely unstable. Narrow casing allows for OK single track traction in a wet enviroment but no thumbs up for hard pack cornering. If given the chance I'd for sure pass and go with something different. (Chalk it up to a lesson learned). Don't be blinded by the price there cheap for a reason spend the extra $40.00 and don't make a brain fart!