Wr250r full offroad tyres sizes.

Hi, i want a set of full knobiea to my wrr.
Noticed that none of the tyres makers make them in the stock size..
Ac10 or mc5 what sizes will fit the stock rim?

Any 21" tires fit the rims.

If you match the rear width (120mm) you will be fine. It will fit the rim. In fact any tire that will fit into the swingarm will fit the rim.

(By the way, those aren't full knobbies, they are dualsport tires.)

While any 120 rear tire will fit I like the way the bike handles with a 100 or 110 rear tire.
It also has a bit more power with a smaller rear tire.

Tire sizes are weird, the 120/80 stock tire is equal to a 100/100 off road non DOT tire. I know the AC10 is sized like non DOT tires, the 120 is a lot bigger than stock, I have run one, I liked the smaller 100/100 track master better, its not a fair comparison because they were different sizes, I'd like the 100/100 AC10 better than the 120 too.

With front tires 90/90 or 80/100 are about the same size and 90/100 tires are a bit bigger, all of those sizes work well.