The 2021 Ford F-150 Raptor will be available with 35-inch or 37-inch tires when it hits dealerships this summer, and the choice really depends on how you plan to use the Raptor, according to Muscle Cars & Trucks.

Based on interviews with Ford engineers, the website advises that the 35-inch tires are better for high-speed off-roading, while the 37-inch tires are better for driving over large obstacles at slower speeds.

Both 2021 Raptor tires are from the BF Goodrich K02 series. The truck comes standard with 35-inch tires; the 37-inch tires are a $7,500 option. They're also the largest tires available from the factory for a half-ton pickup truck.

2021 Ford F-150 Raptor

2021 Ford F-150 Raptor

The bigger tires come with various hardware and software changes, which should avoid the ride and steering issues that often come with simply bolting bigger tires onto a truck, Adam Busack, Ford Performance feature engineering supervisor for the 2021 Raptor, said in an interview with Muscle Cars & Trucks. Those changes include repackaged suspension, and calibration changes for the steering, powertrain, and anti-lock brakes.

Other notable features of the 2021 Ford F-150 Raptor include first-ever coil-spring rear suspension, increased suspension travel (now 14 inches in the front and 15 inches in the rear), and Fox internal-bypass shocks. The Raptor also moves to the current-generation F-150 platform, which brings increased structural rigidity and a new infotainment system, among other features.

Under the hood, the Raptor gets a twin-turbo 3.5-liter V-6, teamed with a 10-speed automatic transmission. Output hasn't been announced, but we expect it to surpass the previous generation's 450 horsepower and 510 pound-feet of torque. Ford has confirmed that an upcoming 2022 Raptor R will get a V-8, but hasn't released any other details.