I am assuming that you installed rims and tires. If so than you may have put rims on with an offset for IRS. In that case wheel spacers are the way to go.
Don't worry about that, it's easy to confuse me. The spacers give my 420 AT a 46" wide track that is a real plus on off camber situations. The spring rubbers help because the 09 Rancher's shocks are not adjustable. So any extra load on the quad will compress the springs.I am sorry cutter I was refering to twin rivers problem. sorry for the confusion. Do the spacers help much, just curious?
The trail clearance is the same. The tires are still just inside the fenders and I don't notice them throwing a lot more mud but I'm sure there is some increase. The factory width is approx. 43" which In my opinion is a bit narrow for riding trails with off camber sections. I added 1 1/2 inch spacers to all four wheels for a new track width of 46". My wife's Kodiak has ITP wheels and Dirt Tammer tires and her track width is 48". I had to add fender extensions to her quad but it is extremely stable. One other thing I did that I feel is helpful. I increased the air pressure in the tires to 8psi. The ride may suffer slightly but if you look at your tires in a off camber section, they tend to roll under on the downhill side. This creates a unstable condition as well. Increased air pressure will help counter that condition.Cutter how is it in tight trails? I widened my 400 ex 6" and its very stable but it hits alot of trees and roots in tight spots but works great in the rock gardens.