All my tires are wearing about the same, the rear one's maybe a little more. I do notice that the rear axle seems to scrub when making tight corners, due to the distance between the axles being greater than trailers I have had in the past, but don't think it has anything to do with the Hensley...
Hope this helps, might also weigh the each axle to see if they are near carrying the same weight, then you can make adjustments with cargo placement and Hensley adjustments to balance out, takes a little time.
2006 Silverado 2500HD Duramax
2010 Prime Time Lacrosse 303RKS
2007 Hensley Arrow Hitch
PT Crew Member 125
Good Sam Club, Cedar Creek Sams Chapter
Passport America Member