25" on a 420....
Personal experience, didn't 26"... But I like to pull and tow..
Went to a 25" reptile, its near stock size and its got an inch of tread..
I like them..
But, the sti outback xt's i had prior did chew through the mud a bit more confidently.. Very aggressive..
I think my next tire will be a mud bug... but i got a ways to go yet on these reptiles.. and I give them a 4/5 BTW..