This set went on a 2019 KTM 350. I needed something more aggressive than the stock Continental 80's that it came with. My first ride was out in dense wooded 2 track trails in Northern Wisconsin. Quite a bit of mud and moss covered rocks, these tires stuck way better than I thought they would, I didn't have any issues getting stuck, when yo do lose traction its predictable and easy to stay upright, the tires will grab again. The tires are much more aggressive looking than the pictures show and they seem like they will last a season running on the road as well. I have about 200 road miles and 100 trail miles so far and the hair is still on them. I will prolly get a set of these for my Husqvarna 350 as well when my current tires wear out. I didn't have any issues installing the front tire but the rear tire has a very stiff carcass and it was a pain to install by hand. Not something you will have to do often so I'm not worried about it.
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Predictable on the street and good in the woods. Is it as good as a full moto tire in the mud or sand, not quite, but it’s far better on the street. Best tire for my usage. Doesn’t do anything perfectly, but does everything well
My Ktm 500 loves this tire on road and dirt
I put these on my DRZ400 ,on the rear, then went on a 210 mile trip with a very aggressive group of riders. In the rain half the day to boot. We did roads , dirt roads, single track, and some trails. I couldn't be happier the tire stuck when I need it to, it was very predictable and fairly quiet. I'm not sure I will get 1000 miles on them but we will see , I would rather replace then try to stretch it.
This design has withstood the test of time. The MT21 has been around for a while and I can see why. It offers good traction in a variety of terrains and it isn't terribly priced. Kudos to Pirelli.
I replaced a rear D606 with this tire. I found the off-road performance as good as the D606 in dry sand, hard pack and rocks. Not as good in mud.
On the street, the MT21 is far superior to the D606, which I found to be a dangerous tire, especially for cornering. The D606 will slide out suddenly with no warning with very little lean angle, but the MT21 lets you lean further, and loses grip only gradually, so you have a warning and a chance to correct.
The D606 wears slightly better than the MT21, but I'm up to 5,000 miles on the MT21.