If you are riding the 580 in the powder, BRING A SHOVEL, you will need it. Trust me

If the snow sets up hard, they will go fine, even on the hills, although the ZR's are not meant for sidehilling; the engine sits lower and they are very hard to pull over. The lower center of gravity helps in the corners on the trail but makes them harder to sidehill...
When I have ridden my 580 in the deeper snow, as long as I kept going, it was ok; but if you stop, you can't get going again. The 121 with 1" paddles really trenches nice, though

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Rebuilding the fleet!
2008 RMK 600 155", 2006 RMK 600 144", 98 Indy 440, 95 Prowler 550 2-up, 1990 Indy 650
RIP, destroyed by fire 1-22-2008

04 RMK 800, 05 RMK 600, 02 RMK 800, 97 RMK 700