All aluminum. 7x31 vs 8.5x29. Go west couple times a year otherwise pull mainly around home. Pull with either a deleted 6.7 cummins or deleted 6.6 duramax. Have a 7x27 now. Wanting to go bigger to fit 5 sleds easliy with extra room. Kinda wanting the 8.5 wide for the ease of loading sleds but am I going to kick myself when I go out west? What's your guys experiences?