do i have enough clearence to run this tall of a lug wtihout riuning the track? I know my 800 has the sack to spin it!

1.75 will fit no problem.

A 2'' will even fit, but you will hit the top of tunnel when landing on hard pack. A buddy of mine had a 2" on his 2002. Half the flipping lugs where torn off because he rides ditch and rides hard.... But great in the fluff.

2" is a pain to get in with the front cooler in there. You can't really go any bigger than that without a D&R to the chaincase.

i've got a 175 in my 03 prox, it fits fine, i'd be shocked if you couldn't get a 2" in there easily... maybe the 04's have 10t drivers (i dont know), but the 9t on the 03 with my 175 leaves PLENTY of clearance, i'd bet i could get a 2.25 in there with little problem (though there wouldn't be a lot of room at that size)