I just purchased a new front tire and went oversize again (not huge) 2.10 against a 1.95 rear.
Both are round profile IRC Mythos xc, It seems 2.10 is the biggest xc tread they have.
I did it last winter, spring and really liked the feel. I lower the front air a fair bit and run a firm tire rear.
Bikes more responsive rear, and the bigger front seems to help pull into corners.
I was going to try a 2.25? But wasn't sure it would fit\ feel good. Anybody run major difference tire size?
I used to see lots of bikes with larger rear tires, not so much anymore....
I find the bigger front improves handling\ bigger rear doesn't, especially a flat profile rear to a round front.