I have the AA clutch kit and will not be going with Polaris clutch weights. I did put 32" Rock A Billy tires on. Each helped a little and both helped a lot with the noise issue. But what fixed the problem of noise was a Rugged Radio with intercom and a good set of headsets. I will not buy Rock A Billy tires again. I just returned from a week in Kanab UT, and driving to and from the trail heads was quite a bit of highway miles. They a very squirrely on pavement, (the center two rows of tread are taller the the rest of the tire face). That is the only part of the tire that is 32". I did not have any problem with the tires or the Xpedition on all the sand trails.