15x6 on 5 1/2" bolt circle, 0" offset, (some folks say they can only find 1/2" offset but that's what the 0" measures) make sure they're rated 2600# and nows the time to upgrade to a load range "D" tire. Nuts are all RH thread 1/2" 85-90#' torque, while you've got the wheels off, how's your shocks? Greg Paulsen