F-150 Tire Calculator: Sizes, Lift Kits & What Actually Fits
OEM sizes for every generation, the largest tire for every lift height, speedometer error, bolt pattern data, and the 33 vs 35 vs 37 decision — all in one place.
Quick Answer: Most Popular F-150 Build
A 2"–2.5" leveling kit + 33×12.50R17 or 33×12.50R20 on stock-offset (+44mm) wheels is the most popular F-150 modification — it fits clean on all 2015–2024 trucks, requires no trimming, and produces under 5% speedometer error. Step up to 35s and you need either minor trimming (leveling kit) or a 3"–4" suspension lift. 37s demand a full 4"+ suspension lift, aftermarket UCAs, and a regear.
In This Guide
F-150 OEM Tire Sizes by Generation
Factory tire sizes for all Ford F-150 generations — from the 7th generation (1980) through the current 14th generation (2021–2024). Use the OEM size as your baseline for calculating speedometer error when upsizing.
14th Gen (2021–2024)
P702Aluminum-intensive body, IFS front. Raptor runs factory 37s.
| Wheel | Available Tire Sizes |
|---|---|
| 17" | 245/70R17, 265/70R17, LT265/70R17, LT315/70R17, 37×12.50R17LT (Raptor) |
| 18" | 265/60R18, 275/65R18, LT265/70R18, 275/70R18 (Tremor) |
| 20" | 275/60R20 |
| 22" | 275/50R22 |
13th Gen (2015–2020)
P552Aluminum body debut. Popular leveling/lift base platform.
| Wheel | Available Tire Sizes |
|---|---|
| 17" | 245/70R17, 265/70R17, LT245/70R17, LT315/70R17 |
| 18" | 265/60R18, 275/65R18, LT275/65R18 |
| 20" | 275/55R20 |
| 21" | 275/50R21 |
| 22" | 275/45R22 |
12th Gen (2009–2014)
P415Steel body. Improved towing capacity. SVT Raptor introduced.
| Wheel | Available Tire Sizes |
|---|---|
| 17" | 235/70R17, 235/75R17, 255/70R17, LT245/70R17, LT245/75R17, 255/65R17, 265/70R17 |
| 18" | 265/60R18, 275/65R18, LT275/65R18 |
| 20" | 275/55R20 |
| 22" | 275/45R22 |
11th Gen (2004–2008)
P221Major redesign. Independent front suspension standard.
| Wheel | Available Tire Sizes |
|---|---|
| 17" | 235/70R17, 235/75R17, LT245/70R17, 255/70R17, 255/65R17 |
| 18" | 265/60R18, 275/65R18, LT275/65R18 |
| 20" | 275/55R20 |
| 22" | 275/45R22 |
10th Gen (1997–2003)
PN96New aero design, IFS introduced. Lightning & Harley-Davidson editions.
| Wheel | Available Tire Sizes |
|---|---|
| 16" | 235/70R16, 255/70R16, LT245/75R16 |
| 17" | 265/70R17, 275/60R17 |
| 18" | 275/45R18 (Lightning) |
| 20" | 275/45R20 (Harley-Davidson edition) |
9th Gen (1992–1996)
Twin I-beam front axle. Lightning performance variant.
| Wheel | Available Tire Sizes |
|---|---|
| 15" | 215/75R15, 235/75R15 |
| 17" | 275/60R17 (Lightning) |
8th Gen (1987–1991)
Aerostar-era facelift. Twin I-beam standard.
| Wheel | Available Tire Sizes |
|---|---|
| 15" | 215/75R15, 235/75R15 |
7th Gen (1980–1986)
Classic boxy styling era.
| Wheel | Available Tire Sizes |
|---|---|
| 15" | 215/75R15, 235/75R15 |
14th Gen (2021–2024) Tire Sizes by Trim
Trim-level OEM specs matter because higher trims run lower-profile tires on larger wheels — which affects how much room you have for upsizing. A Platinum on 22s has far less room for taller tires than an XLT on 17s.
| Trim | Wheel | OEM Tire | OD |
|---|---|---|---|
| XL / XLT (4×2) | 17" | 245/70R17 | ≈30.5" |
| XL / XLT (4×4) | 17" | 265/70R17 | ≈31.6" |
| Lariat / King Ranch | 18"–20" | 265/60R18 or 275/60R20 | ≈30.5"–31.9" |
| Platinum / Limited | 20"–22" | 275/60R20 or 275/50R22 | ≈31.9"–31.1" |
| Tremor | 18" | 275/70R18 | ≈33.2" |
| Raptor R / Raptor | 17" | 37×12.50R17LT | ≈37.0" |
F-150 Tire Fitment by Lift Height
The single most-asked question in the F-150 community: what is the biggest tire I can fit? The answer is always the same — it depends on your lift height, wheel offset, and how much trimming you are willing to do. This table gives you the real-world community-verified maximums.
Stock 4×4 (no lift)
Max Tire Diameter
32"–33" narrow
Max Tire Size
Up to 285/70R17 (≈32.7") or 33×11.50R17 on stock wheels
Wheel Offset
+44mm OEM offset required
Trimming
None
F-150 ships with ~2" rake (front low). Stock offset and factory 265/70R17 (≈31.6") leaves ~1" of clearance headroom for upsizing.
2"–2.5" Leveling Kit
Max Tire Diameter
33"–34"
Max Tire Size
33×12.50R17/18/20 clean fit; 35×12.50 possible with minor trimming
Wheel Offset
+18mm to +44mm (stock offset works)
Trimming
Minor (front crash bar, inner liner for 35s)
Most popular F-150 modification. A level + 33×12.50 on stock offset wheels is the safest no-rub setup on 2015–2024 trucks.
3"–4" Suspension Lift
Max Tire Diameter
35"–36"
Max Tire Size
35×12.50R17/18/20 clean; 37×12.50 with trimming + aftermarket UCAs
Wheel Offset
+0mm to +25mm (mild negative offset OK)
Trimming
Minimal for 35s; trimming + UCAs needed for 37s
Full suspension lift (not spacers) with geometry correction. Requires alignment. 35s feel stock-like in performance with 3.55+ gearing.
4"–6" Suspension Lift
Requires supporting modsMax Tire Diameter
37"–38"
Max Tire Size
37×12.50R17–37×13.50R20 with proper UCAs and trim
Wheel Offset
−12mm to +18mm
Trimming
Required — crash bars, fender liner, potentially bumper
Requires aftermarket upper control arms, extended brake lines, and alignment. Regearing to 4.56 highly recommended.
6"+ Full Build Lift
Requires supporting modsMax Tire Diameter
38"–40"
Max Tire Size
38×14.50R20, 40×13.50R17, 40×14.50R20
Wheel Offset
−25mm to +12mm
Trimming
Extensive — purpose-built off-road platform
Full build: custom driveshafts, high-clearance bumpers, regearing, brake proportioning update. Not daily-driver territory unless purpose-built.
One Rule for Every Lift Height
Wider tires need more clearance than taller tires. A 35×12.50 (12.5" wide) is harder to fit than a 295/70R18 (≈11.6" wide) even though both are roughly 34–35" tall. When on the edge of clearance, going narrower is always the safer move. Always verify fitment on your specific model year and trim — factory tolerances vary.
33 vs 35 vs 37-Inch Tires: Full Comparison
Choosing a tire diameter is the most consequential decision in an F-150 build. Here is what actually changes between each size — and the honest trade-offs that tire shops rarely mention.
33" Tires
Leveled F-150, daily driver with trail capability
Lift Required
2"–2.5" leveling kit
MPG Impact
−1 to −2 mpg
Speedo Error
~3–5% (under 5% threshold — recal optional)
Regear Needed?
No (3.31+ adequate)
Pros
- Clean fit with stock/mild offset
- Minimal performance impact
- Affordable tire selection
- No trimming needed
Cons
- Less aggressive look vs 35s
- Limited ground clearance gain over stock
35" Tires
Lifted F-150 with real off-road use, popular "sweet spot"
Lift Required
2.5"–3" level (with trim) or 3"–4" suspension lift (clean)
MPG Impact
−2 to −4 mpg
Speedo Error
~9–11% (recalibration recommended)
Regear Needed?
Optional (3.55+); recommended on 3.31 or 2.7L EcoBoost
Pros
- Dramatic stance improvement
- Real off-road capability gain
- Wide tire selection
- Raptor-adjacent look
Cons
- Requires trimming or 3"+ lift
- Performance loss without regear
- Speedometer correction needed
37" Tires
Purpose-built off-road F-150, serious trail use
Lift Required
4"+ suspension lift + aftermarket UCAs (mandatory)
MPG Impact
−3 to −5 mpg
Speedo Error
~15–17% (FORScan recalibration required)
Regear Needed?
Yes — 4.56 strongly recommended on all drivetrains
Pros
- Maximum off-road capability
- Matches F-150 Raptor factory spec
- Handles extreme terrain
Cons
- Extensive modifications required
- High cost (lift + UCAs + tires + regear)
- Larger turning radius
- Harsh highway ride
Speedometer Error by Tire Size
When you install larger tires, each wheel rotation covers more ground than the factory calibration expects — so your speedometer reads high. Below are calculated speedometer errors for common F-150 tire upgrades. Use the Tire Size Calculator for your exact combination.
| Stock Tire | New Tire | OD Diff | Speedo Error | At GPS 60 | Recal? |
|---|---|---|---|---|---|
| 265/70R17 (≈31.6") | 285/70R17 (≈32.7") | +1.1" | +3.5% | 62.1 mph indicated | Optional |
| 275/55R20 (≈31.9") | 33×12.50R20 (≈33.0") | +1.1" | +3.4% | 62.0 mph indicated | Optional |
| 265/70R17 (≈31.6") | 33×12.50R17 (≈33.0") | +1.4" | +4.4% | 62.6 mph indicated | Optional |
| 265/70R17 (≈31.6") | 35×12.50R17 (≈35.0") | +3.4" | +10.7% | 66.4 mph indicated | Yes |
| 275/55R20 (≈31.9") | 35×12.50R20 (≈35.0") | +3.1" | +9.7% | 65.8 mph indicated | Yes |
| 265/70R17 (≈31.6") | 37×12.50R17 (≈37.0") | +5.4" | +17.1% | 70.2 mph indicated | Yes |
How to Recalibrate: FORScan Method
- Download FORScan (free) and obtain the extended license (free 2-month trial, renewable)
- Purchase an OBD2 adapter compatible with FORScan (ELM327 WiFi/Bluetooth, ~$15)
- Connect adapter to OBD port, connect FORScan to your truck
- Navigate to Body Control Module (BCM) → Configuration & Programming
- Find "Tire Circumference" and update with the circumference of your new tires in millimeters
- Circumference formula: π × diameter_in_inches × 25.4 = mm circumference
- Save to ECU, cycle ignition, verify speedo with GPS
F-150 Bolt Pattern & Wheel Offset
Before ordering aftermarket wheels, verify you have the right bolt pattern, center bore, and a compatible offset for your build. The 2004+ F-150 uses a 6×135mm pattern — distinct from Chevy/GMC's 6×139.7mm (6×5.5").
| Years / Generation | Bolt Pattern | Center Bore | Thread | Lug Torque |
|---|---|---|---|---|
| 2004–2024 (10th–14th Gen) | 6×135mm | 87.1mm | M14×1.5 | 150 ft-lb |
| 1997–2003 (10th Gen, early) | 5×135mm | 87.1mm | M14×1.5 | 100 ft-lb |
| 1987–1996 (8th–9th Gen) | 5×135mm | 87.1mm | M14×1.5 | 100 ft-lb |
| 1980–1986 (7th Gen) | 5×139.7mm | 87.1mm | 9/16"–18 | 100 ft-lb |
Wheel Offset Guide for 2015–2024 F-150
Stock / Safe (Leveling Kit)
+18mm to +44mm
Stock offset. Tire stays tucked. Works with any leveling kit. No bearing stress increase.
Moderate Stance (Lift)
0mm to +18mm
Mild outward stance. Fine with a 3"+ suspension lift. Slightly increases bearing load.
Aggressive (Full Build Only)
−25mm to 0mm
Significant bearing and hub stress increase. Requires 4"+ lift, potential extended studs, alignment check.
Gear Ratio vs Tire Size: Do You Need a Regear?
Larger tires change your effective gear ratio — a 37" tire effectively "tall-gears" the truck. The engine must spin more mass per mile of travel. Without compensating via regearing, acceleration suffers and the transmission shifts differently. The table below shows the relationship between your tire size and gear ratio.
| Tire Diameter | 3.31 Axle | 3.55 Axle | 4.10 Axle | 4.56 Axle |
|---|---|---|---|---|
| 31"–32" (stock) | ✅ Optimal | ✅ Optimal | ✅ Optimal | ✅ Fine |
| 33" | ⚠️ Slightly lazy | ✅ Good | ✅ Good | ✅ Good |
| 35" | ❌ Noticeably slow | ⚠️ Adequate | ✅ Good | ✅ Excellent |
| 37" | ❌ Unacceptable | ❌ Poor | ⚠️ Marginal | ✅ Recommended |
| 40"+ | ❌ Unacceptable | ❌ Unacceptable | ❌ Poor | ⚠️ Minimum |
Regear formula: Desired axle ratio = (Factory axle ratio × New tire diameter) ÷ Stock tire diameter. Example: 3.55 × 37 ÷ 31.6 = 4.16 — so 4.10 or 4.56 ratios restore factory feel on 37s.
AT vs MT vs HT Tires: Which Type for Your F-150?
Tire type (tread pattern and construction) matters as much as diameter. The right choice depends on how you actually use the truck, not how you wish you used it.
| Type | On-Road | Off-Road | Noise | MPG Impact |
|---|---|---|---|---|
| Highway Terrain (HT) | ★★★★★ | ★★☆☆☆ | Very quiet | Minimal (−0.5 to −1 mpg vs stock) |
| All-Terrain (AT) | ★★★★☆ | ★★★★☆ | Moderate at highway speed | −1 to −2 mpg |
| Mud-Terrain (MT) | ★★★☆☆ | ★★★★★ | Loud on highway (hum/drone) | −2 to −4 mpg |
| Rugged Terrain (RT/X-T) | ★★★★☆ | ★★★★★ | Louder than AT, quieter than MT | −1.5 to −3 mpg |
6 Common F-150 Tire Fitment Mistakes
These are the mistakes that forum veterans see over and over — and that cost truck owners money, tire wear, or worse. Know them before you order.
Running 35s with only a 2" spacer lift
High risk35×12.50 needs real suspension travel clearance. A spacer-only "lift" raises ride height but does not improve wheel well clearance during compression — tires rub on full steering lock and over bumps.
Install a proper 2.5"–3" leveling kit with geometry correction, or do minor front crash bar trimming. Do not rely solely on spacers.
Fitting wide wheels (negative offset) with a leveling kit
High riskA 2" leveling kit creates clearance vertically, not laterally. Negative-offset wheels push the tire outward toward the fender. Combine a wide footprint with a leveling kit and the tire contacts the inner fender liner on turns.
Stay at stock offset (+44mm) or mild aftermarket (+18–+44mm) with a leveling kit. Save negative-offset wheels for 3"+ full suspension lifts.
Ignoring speedometer error on 35s and 37s
Medium riskA 35" tire on a truck calibrated for a 31.6" tire reads ~10% fast on the speedo — you show 55 mph when doing 50. Beyond the safety issue, this skews ADAS features (lane keep, radar cruise) and warranty-relevant odometer records.
Use FORScan (free + extended license) to update the BCM tire circumference value. Takes 15 minutes. Essential on any truck running 35s or larger.
Running 37s without regearing
High risk37" tires are ~17% larger in diameter than factory 31.6" tires. Without regearing, the engine RPM at highway speed drops into a torque-poor zone. 0–60 mph times increase dramatically and fuel economy worsens more than it would with properly matched gears.
Regear to 4.56 ratios for 37s. On the 3.5L EcoBoost or 5.0L V8, 4.10 is a viable compromise if daily driving dominates.
Overlooking load rating when choosing LT vs P-metric
Medium riskF-150s used for towing or payload need LT (Light Truck) rated tires. LT tires carry higher load ratings that match the truck's GVWR. Fitting P-metric tires on a regularly loaded or towing F-150 creates an unsafe under-rating situation.
If your F-150 tows a trailer or regularly carries max payload, choose LT-rated tires. Street-only, lightly loaded builds can run P-metric for better on-road comfort.
Not getting alignment after a lift
High riskAny lift changes front-end geometry: caster, camber, and toe all shift. Running misaligned geometry accelerates tire wear (you will eat the shoulder off a new set of 35s in 10k miles) and degrades handling.
Alignment is mandatory after any lift install. Use a shop with experience on lifted trucks. Aftermarket UCAs on 4"+ lifts may require specialty alignment specs.
Calculate Your Exact F-150 Tire Size
Enter your current tire size and new size to get the exact percentage difference in diameter, speedometer error, speedometer-corrected speeds, and whether your combination falls within safe limits for your lift height.
Frequently Asked Questions
Frequently Asked Questions
Tire fitment data in this guide is based on published OEM specifications, community-verified fitment reports (f150forum.com, f150gen14.com), and manufacturer literature. Real-world clearance varies by specific model year, trim, suspension condition, and wheel combination. Speedometer error calculations assume nominal tire dimensions. Always verify fitment on your specific truck, and consult a professional installer before running tires near clearance limits. TireCalculatorHub is not liable for any damages arising from use of information on this website.