i bought 35x12.50x17 saturday and went to CJs to get them put on. They told me it wouldnt fit on my rims (7.5" wide). i went to my buddy's shop and got him to try putting one on. they fit like a charm. id say youll be fine
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05 2500 cummins Reg LB- straight pipe, Edge Juice w/ Attitude, AFE Stage 1, rolling on 35's.