3 weeks ago I slapped on a set of ITP XTRs in 26-9 front and 26-11 rear. Since, I have rode it on groomed snomobile trails, crusty snow that was 3-4 foot deep, pushed snow 1.5 feet deep on a frozen lake and did hill climbing on a layer of snow, on a layer of mud, with frozen ground undernieth.
I think all the hype about taller tires is B.S.
The reason the Grizz seems like it doesn't rev as quick is do to the fact that with these tires it hooks up and goes like the proverbial bat out of ****. On saturday I was hill climbing with a buddy that has stock tires on his Kodiak, I was in 2wd and he was in 4 LOCK!! His comment was I'ME SOLD!!
As Irv says they will trash your sod even taking it easy.
I'me not waisting my money on a clutch kit any time soon. I hunt off of this machine and I don't want it putting around at 4000 RPM.