Most likely you could, the fenders sit pretty high off the tire. The thing to look at would be the cross brace for the chain guard.
I cut mine off to install a TAV, but I remember it was not too far away from the stock tires.
Look up larger tires to get the diameter and then check that against the cross brace.
Like the Kenda 20 x 7 x 8, would put your 1/2" closer to the cross bar.