Fabtech 17-21 Ford F250/F350 4WD Gas 4in Basic Sys w/Perf ShksTIRE SIZE 35 12. 50R17 WHEEL 17X9 W 4 3 4" BS W MINOR TRIMMING; TIRE SIZE 35 12. 50R18 WHEEL 18X9. 5 W 4 3 4" BS W MINOR TRIMMING; TIRE SIZE 35 12. 50R20 WHEEL 20X9 W 5" BS W MINOR TRIMMING; 3. NON DUALLY MODELS ONLY.; 165. SOME 2017 MODELS MAY REQUIRE A DUAL STEERING STABILIZER FOR OVERSIZED TIRES. ORDER DIRT LOGIC FTS220512, DIRT LOGIC W RESI FTS221162 OR STEALTH FTS8046.; 171. WILL NOT FIT DIESEL MODELS This Part Fits: Year Make Model Submodel