yeah mate they will fit fine, the 2.5" or 2.1" or whatever relates to how wide the tire is, nothing todo with the rim size and the 26" is the size of the wheel
@undercoverfreak i think instead of subscribing to see if it's funny you should rather tell the guy that the fact he has 2,35" tyres doesn't mean that rims are 2,35" only.
why didn't anyone bother to mention that if the rim is too wide, 2,1 can become to flat?