Before you dismiss this, keep in mind that Ford’s kit includes more than simply two-inch larger tyres. The package comprises 17-inch forged aluminium bead-lock-capable wheels, front Fox dampers with a 1.0-inch rod diameter (an eighth-inch increase) to account for the added mass, and limited-slip front diff, in addition to the 37×12.5R-17 BFGoodrich All-Terrain T/A KO2s for which it is called. The back of the frame is also modified to accommodate a full-size spare tyre. With “37” decals on the bedside and tailgate, owners can flaunt the larger tyre size.
The 37-inch tyres improve approach, departure, and break-over angles by 2.1, 1.0, and 1.7 degrees, respectively, as compared to the F-150 Raptor’s normal 35-inch KO2s. The Raptor’s ground clearance has increased by 1.1 inches, and it is now 0.9 inches taller. The 37s, on the other hand, necessitates a 1.0-inch front suspension travel reduction and a 0.9-inch rear suspension travel reduction. We found the improved clearances to be more impressive on paper in a tough off-road facility in northern Michigan. The taller sidewalls, on the other hand, are excellent at absorbing rocks, ruts, and roots.
The F-150 Raptor sports a twin-turbocharged 3.5-litre V-6 engine that produces 450 horsepower and 510 pound-feet of torque, regardless of tyre size. The boosted six braps, braps, braps are louder than the Ram 1500 TRX’s supercharged V-8 with the new equal-length exhaust system set to Baja mode.
The larger rubber has little effect on performance. In 5.2 seconds, both Raptors reach 60 mph. At 14.0 seconds and 96 mph, the vehicle on 37s was only 0.1 seconds slower through the quarter-mile. The 37s have 0.01 g more grip than the 35s at their 0.70-g limit (like that matters). From 70 mph, braking took 14 fewer feet. On the highway, the larger tyres aren’t as loud—at 70 mph, the loudness inside the cabin was only one decibel louder. We averaged 16 mpg on the interstate at 75 mph, which is 2 mpg less than the basic F-150 Raptor; both numbers match the EPA highway projections.
Raptor owners can now brag about the 37 Performance package. The extremely numbers-obsessed, on the other hand, might want to hold out until the Raptor R, which is expected to have a 700-plus-hp V-8. That’s a number that deserves to be on a bumper sticker.