I know a 1.5 will fit as thats what I had on my 03 rev but you will not be able to stud it I am not sure about the 1.75 it would be tight and may require a driver change. Is your sled an MXZ 121"?
One note if you ride alot of hard packed trail your going to need scratchers to help with cooling on the larger tracks especially if yours has had the beavertail delete kit installed