F-150 Tire Calculator: Sizes by Trim, Speedometer Error & What Ford Lists
Tire sizes from Ford's specifications and owner's manuals, calculated diameters, speedometer error and lug nut torque.
Quick Answer
- Ford lists 245/70R17 up to 275/50R22 on the 2021 to 2026 F-150 depending on trim, with LT315/70R17 on the Raptor. On 4x4 STX, XLT and Lariat trucks Ford lists 275/65R18 (32.07 in tall, calculated).
- A 275/70R18 is 33.16 in, 3.4% taller, so an indicated 60 mph is 62.0 mph.
- Ford does not publish a maximum tire size or lift requirement. Check any other size with a Ford dealer.
F-150 OEM Tire Sizes by Generation
Sizes below are the ones named in Ford documents for each period. Where the documents give only snow chain sizes, the row says so.
| Period | Sizes | Source |
|---|---|---|
| 2015–2020 (13th gen) | Owner's manuals name only the snow chain sizes: 245/70R17, LT245/70R17, 265/70R17 and 265/60R18. | 2015, 2018 and 2020 owner's manuals |
| 2021 (14th gen) | 245/70R17, LT265/70R17C, 265/60R18, 275/65R18, LT265/70R18C, 275/60R20, 275/50R22, and 275/70R18 on the Tremor. | 2021 F-150 technical specifications |
| 2024 | 245/70R17, 265/70R17C, 265/60R18, 275/65R18, 265/70R18C, 275/60R20, 275/50R22, and 275/70R18 on the Tremor. | 2024 F-150 tech specs |
| 2026 | 245/70R17, 265/70R17, 265/70R17C, 265/60R18, 275/65R18, 265/70R18C, 275/70R18 (Tremor), 275/60R20, 275/50R22, LT315/70R17 (Raptor) and 37x12.5R17 (Raptor 37 Package). | 2026 F-150 specifications |
14th Gen (2021–2024) Tire Sizes by Trim
Trim breakdown is from Ford's 2026 specifications. Height and revolutions per mile are calculated.
| Trim | Tire (Ford) | Height in (calc.) | Revs/mile (calc.) |
|---|---|---|---|
| XL, XLT 4x2 | 245/70R17 all-season | 30.50 | 661 |
| XL 4x4 | 265/70R17 all-terrain | 31.61 | 638 |
| STX, Lariat 4x2 | 265/60R18 all-season | 30.52 | 661 |
| STX, XLT, Lariat 4x4 | 275/65R18 all-terrain | 32.07 | 629 |
| Tremor | 275/70R18 all-terrain | 33.16 | 608 |
| King Ranch, Platinum | 275/60R20 all-season (4x2), all-terrain (4x4) | 32.99 | 611 |
| STX Lobo, King Ranch, Platinum (optional) | 275/50R22 all-season | 32.83 | 614 |
| Raptor | LT315/70R17 all-terrain | 34.36 | 587 |
| Raptor 37 Package (optional) | 37x12.5R17 all-terrain | 37.00 (nominal) | 545 |
33 vs 35 vs 37-Inch Tires: Full Comparison
Only sizes Ford lists are shown. Inch sizes such as 37x12.5R17 quote a nominal height; metric sizes are calculated. To see an inch size written in metric, use the flotation to metric size table, and to draw two of them to scale the side-by-side tire comparison.
| Class | Ford-listed sizes | Height in | Note |
|---|---|---|---|
| 33-inch class (Ford-listed) | 275/70R18, 275/60R20, 275/50R22 | 32.83 to 33.16 | All three appear in Ford's 2026 specifications. |
| 34-inch class (Ford-listed) | LT315/70R17 | 34.36 | Raptor standard size. |
| 37-inch class (Ford-listed) | 37x12.5R17 | 37.00 (nominal) | Raptor 37 Package. Inch sizes quote a nominal height. |
Custom Tire Sizes Compared With the 275/65R18
Sizes owners ask about, calculated against the 275/65R18 Ford lists for 4x4 STX, XLT and Lariat trucks. These are calculated heights, not Ford approvals; Ford publishes no maximum size, lift or leveling-kit requirement.
| Size | Height in (calc.) | Versus 275/65R18 | True speed at 60 mph indicated |
|---|---|---|---|
| 255/75R17 | 32.06 | -0.0% | 60.0 mph |
| 265/70R17 | 31.61 | -1.5% | 59.1 mph |
| 285/75R17 | 33.83 | +5.5% | 63.3 mph |
| 285/65R18 | 32.59 | +1.6% | 61.0 mph |
| 295/70R18 | 34.26 | +6.8% | 64.1 mph |
| 295/75R18 | 35.42 | +10.4% | 66.3 mph |
| 35x12.5R18 | 35.00 | +9.1% | 65.5 mph |
| 35x12.5R20 | 35.00 | +9.1% | 65.5 mph |
| 37x12.5R17 | 37.00 | +15.4% | 69.2 mph |
Inch sizes such as 35x12.5R20 quote a nominal height. For any other size use the F-150 tire size calculator.
Speedometer Error by Tire Size
True speed = indicated speed × (new diameter ÷ stock diameter). Each row compares two sizes Ford lists; all figures are calculated.
| From | To | Change | True speed at 60 mph indicated |
|---|---|---|---|
| 245/70R17 | 265/70R17 | +1.10″ (+3.6%) | 62.2 mph |
| 265/70R17 | 275/65R18 | +0.47″ (+1.5%) | 60.9 mph |
| 265/60R18 | 275/65R18 | +1.56″ (+5.1%) | 63.1 mph |
| 275/65R18 | 275/70R18 | +1.08″ (+3.4%) | 62.0 mph |
| 275/60R20 | 275/50R22 | -0.17″ (-0.5%) | 59.7 mph |
| LT315/70R17 | 37x12.5R17 | +2.64″ (+7.7%) | 64.6 mph |
F-150 Bolt Pattern & Wheel Offset
Ford's owner's manuals and specification sheets do not list the bolt pattern, centre bore or offset for the road wheels, so we do not show them. Confirm them with a Ford dealer or the wheel maker.
Lug nut thread and torque: M14 x 1.5, 150 lb-ft (204 Nm), in the 2015 to 2026 F-150 and Lightning manuals. Retighten within 100 miles after any wheel disturbance.
Spare wheels: 17x8.5 with 34 ET for LT315/70R17 and 17x8.5 with 32 ET for 37x12.5R17LT.
Gear Ratio vs Tire Size: Do You Need a Regear?
Ford's documents do not list axle ratios or give regear advice. The arithmetic is below, and the effective gear ratio calculator and the engine RPM at highway speed calculator do it for you:
- Effective ratio with a new tire = axle ratio × (stock diameter ÷ new diameter).
- Ratio that restores the original effective ratio = axle ratio × (new diameter ÷ stock diameter).
For example, a 3.55 axle with 265/70R17 (31.61″) changed to 275/70R18 (33.16″) has a calculated effective ratio of 3.38, and 3.72 would restore the original. Ask a Ford dealer which ratios exist for your truck.
Checking a different size
- Ford's manual warns to replace wheels and tires with the exact original brand, size and construction. It says other combinations, even with identical size ratings, may result in insufficient running clearances, tire rubbing and eventual puncture.
- Ford's documents do not publish maximum tire size, lift or leveling-kit requirements, fender clearance or differential advice.
- Use the calculator to see the diameter change and speedometer error. Continental guidance is to keep the rolling circumference within 3%; this is not a Ford specification.
Calculate Your Exact F-150 Tire Size
Enter your current tire size and another size to get the diameter difference, speedometer error and true speeds.