By the Rims & Tires Team
Compiled & reviewed by our West Georgia tire & wheel research team · Updated 2026-07-17
The Ford Bronco Raptor is a factory-built wide-body off-road machine — wider than the standard Bronco by about 9.8 inches, running 37-inch BF Goodrich KO2 tires straight from the factory. It has Fox Live Valve suspension, 418 horsepower from its 3.0L EcoBoost V6, and Trail Turn Assist for rock crawling. The tires on a Raptor are not an afterthought — BFG KO2s are widely considered the benchmark all-terrain tire and the Raptor was designed around them.
Factory Tire Setup on the Bronco Raptor
The Bronco Raptor ships with 37x12.50R17 BF Goodrich All-Terrain T/A KO2 tires as standard — the same tire considered by most off-road enthusiasts to be the benchmark all-terrain option. Ford chose the KO2 not for cost reasons but because the Raptor program engineers specifically validated the suspension tune and handling characteristics on this tire.
The 37x12.50R17 size requires the Raptor's wide-body flare kit to clear without rubbing. Running this size on a standard-width Bronco without flares would cause significant rubbing. The Raptor's fenders are specifically designed for this size.
Load range is critical: the Bronco Raptor is a heavy performance truck. The KO2 in 37x12.50R17 is available in Load Range C and Load Range E. The Raptor runs Load Range E (10-ply rating) for the additional load and sidewall protection the aggressive off-road use demands.
Replacement Tire Options for the Bronco Raptor
Staying with BFG KO2 for replacements is the most straightforward choice — no need to re-validate fit, no change to the handling characteristics the suspension was tuned for. Many Bronco Raptor owners simply replace with the same tire indefinitely.
The Toyo Open Country AT III in 37x12.50R17 is a strong alternative to the KO2 with excellent on-road manners and strong all-terrain performance. It is slightly quieter on the highway than the KO2 and competitive for off-road performance in most conditions.
For owners who push the Raptor into more aggressive off-road use than the KO2 is designed for — deep mud, rock crawling, sustained technical trails — a mud-terrain tire like the Toyo Open Country M/T or Nitto Trail Grappler in 37x12.50R17 is the upgrade path. Expect significantly more highway noise with the switch from A/T to M/T.
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Sizing Considerations and Lift
The Bronco Raptor runs 37s without a lift kit — this is a factory fitment made possible by the wider body and Raptor-specific suspension geometry. Standard Bronco owners who want 37s typically need a 2 to 3 inch lift for proper clearance.
Going larger than 37 inches on a stock Raptor is possible with careful size selection but may require body trimming in extreme turn positions. Most Raptor owners find the 37 to be the right size for the platform without modification.
Wheel width matters on the Raptor: the KO2 37x12.50R17 is a 12.5-inch-wide tire. Running a narrower tire (like a 37x10.50) on the same wheel reduces off-road flotation and traction. For maximum trail performance, maintain the 12.5-inch width the Raptor was designed around.
Frequently asked
What tires come on the Ford Bronco Raptor?
The Bronco Raptor ships with 37x12.50R17 BF Goodrich All-Terrain T/A KO2 tires in Load Range E, as factory-standard equipment. This is not a cost-saving choice — the KO2 was specifically chosen by the Raptor engineering team as the correct tire for the platform.
Can I run 37-inch tires on a standard Bronco without a lift?
With the right modifications, some standard Broncos can run 37s with minor trimming but most need a 2 to 3 inch lift for proper clearance. The Raptor's wide-body flares and specific suspension geometry allow 37s stock. On a standard-width Bronco, expect to trim the inner fender liner at minimum for the 37-inch width.
What is a good replacement for BFG KO2 on the Bronco Raptor?
The Toyo Open Country AT III is the closest alternative for owners who want similar performance with slightly better highway manners. The Falken Wildpeak AT3W is a strong budget alternative in 37x12.50R17. For more serious off-road use, the Toyo Open Country M/T or Nitto Trail Grappler M/T in the same size are the mud-terrain upgrades.
How often should I replace Bronco Raptor tires?
37-inch A/T tires on aggressive off-road use typically last 25,000 to 45,000 miles depending on the road/trail mix and driving style. Frequent rock crawling and heavy mud use shortens life significantly. Rotate all five tires (including the spare if it is the matching size) every 5,000 to 7,500 miles.
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Last updated 2026-07-17. General guidance only — confirm specifics with a local shop for your exact vehicle.