Gen 3 Raptor 37 Package — Is the $7,500 Option Worth It?
Difficulty 1/50.25–0.5 hrs$0–75002021-present
The Gen 3 Raptor 37 Package includes 37x12.5R17 BFG KO2s, 4.10 axle gears, and Brembo brakes — not bigger tires. If you want 37s on a Gen 3 and don't have the package, you're missing the gear ratio that makes them functional. The package costs more than adding the tires alone post-purchase.
The $7,500 (approximate MSRP) for the 37 Package is straightforward to frame as paying $7,500 for 37-inch tires. That framing is wrong. The tires are part of the package. The more important parts are the 4.10 axle gears and the Brembo brake upgrade that come with them.
**37x12.5R17 BFGoodrich KO2 tires** — four of them plus a matching spare (five total)
**17x8.5 forged aluminum beadlock-capable wheels** — upgraded from the base Gen 3 forged wheels
**4.10 axle gears front and rear** — the base Gen 3 runs 3.73 gears
**Upgraded Brembo front brake calipers and larger rotors** — the 37s add unsprung weight, the Brembos restore braking performance
**Fox Live Valve shock tune** — recalibrated for the 37s' additional weight
The base Gen 3 Raptor runs 3.73 axle gears. The 3.5L EcoBoost at 450 hp can push the truck through any situation with 3.73s, but the experience with 37s on 3.73s is noticeably worse than 35s on 3.73s. Acceleration from a stop is sluggish relative to what the engine should be capable of, highway RPM rises, and the transmission hunts more between gears.
The 4.10 gears in the 37 Package fix this. They're the correct calibration for 37-inch tires — the truck drives like a Raptor again. Everything Ford adjusted in the 37 Package (shock tune, gears, brakes) reflects the fact that 37s are not aesthetics — they change the truck's dynamic character in ways that require engineering responses.
If you buy a base Gen 3 and later want 37s with the right gear ratio, the cost calculation changes:
Four 37x12.5R17 BFG KO2s (replacing the stock 315/70R17s): ~$1,600 for tires
4.10 ring and pinion front and rear plus installation: $2,500–$4,000
Brembo brake upgrade (if desired): $1,800–$3,000
Fox shock retune for 37s: $400–$800
**Total post-purchase cost to reach 37 Package spec:** $6,300–$9,800
At that range, the $7,500 factory option is not expensive — it's integrated, warrantied, and calibrated by engineers who knew what they were doing. The factory option also means the truck is covered under Ford's warranty in the 37 Package configuration. Dealer-installed gear sets may void powertrain coverage, depending on the dealership and the tech.
Anyone planning to run the truck primarily on-road — the 37s add rolling resistance, reduce fuel economy (about 1–2 MPG vs. stock 315/70), and increase highway noise
Anyone planning to upgrade to aftermarket suspension and custom gear ratios regardless — if you're building the truck heavily, the factory package becomes a baseline you'll modify anyway
Budget-constrained buyers — the $7,500 adds significantly to purchase price. A Gen 3 base with 315/70R17 is still a capable truck
Anyone planning serious desert or trail use with 37s — the gear ratio integration alone justifies it
Anyone who won't be doing significant aftermarket suspension modification — the factory package is properly engineered
Anyone who values factory warranty coverage on the drivetrain
Why it works
Factory integration means all components are calibrated together
Covered under Ford's factory warranty
Five matching tires including spare
Significantly cheaper than adding the equivalent aftermarket
Trade-offs
$7,500 is real money on top of an already expensive truck
Fuel economy drops 1–2 MPG versus stock 315/70
Highway noise increases with 37s
Resale value benefit is partial — used 37 Package trucks command a premium, but not the full $7,500 option cost
Parts
Part
Vendor
Est. price
BFGoodrich KO2 37x12.5R17 (individual — factory pricing as option)
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.