I ordered 20x6x10 and I meant to order 20x7x10... oops! Can I still mount the 6s on a 7'' rim?

Yea but your rims are going to get bashed. Epending on what you ride, I guess.

Why do you say they will get based?

Because your tire is an inch thinner than your rim. I have 8" wide tires and 7" wide rims and mine still get trashed.

So basically they are easier to bash up then?

i thought the third number was rim size?? 20 height of tire 7 width of tire and 10 rim size

I guess that would make more sense.

Yea your right

my fronts are 20-6-10..dont worry..thats what everyone runs for mx tires

BTW: Stock rims are around 6''

I got 6 inch wide fronts, the rimss stick out a little more but aint to bad... really wanted new aftermarket rims tho eventually

Like I said, depends on what you ride. Just like stock rears, 20x10x9, then aftermarket 20x11x9. That extra inch helps with rocks and roots when your in the trails. Bend the lip just right and there goes your air.