Ford F-150 Tyre Size: How to Find It & What Fits

Finding the right tyre size for a Ford F-150 takes about two minutes once you know where to look, and guessing is the one thing you should not do. The size is printed on a placard on the driver's door jamb, in the owner's manual, and on the sidewall of the tyre already fitted. Below you will find a step-by-step check for each of those places, the sizes this model is commonly fitted with, and the ±3% rule that governs whether a different size keeps your speedometer honest.

This is a calculation, not a safety approval. Always check your vehicle's door-jamb placard, load index and speed rating, and confirm fitment with a tyre professional before fitting a different tyre size.

Where to find the tyre size on your Ford F-150

There are three reliable places, and you only need one of them to agree with the other two. Start with the door-jamb placard: open the driver's door and look at the sticker on the door frame (the B-pillar on most cars). It lists the tyre size the manufacturer specified for your car, together with the recommended cold inflation pressures for the front and rear axles and, on many cars, a separate size for the spare. Because the placard is matched to your car's VIN and build, it outranks any website list — including this one. If the placard is worn or missing, the owner's manual carries the same information in the specifications section, usually under wheels and tyres. The placard is matched to your Ford F-150's build, so it outranks any list that covers the model in general.

The third place is the sidewall of the tyre already on the car. A code such as 265/70R17 108T is moulded into the rubber, and it tells you exactly what is fitted right now. Read all four tyres, not just one: a previous owner may have fitted a different size to one axle, and a mismatch between axles is something you want to know about before you order. If the placard, the manual and the sidewall all agree, you have your size. If they disagree, the placard wins — and if the fitted tyre is a different size from the placard, ask a tyre professional to check whether it is an acceptable alternative before you replace it. On the Ford F-150, that two-minute check is the difference between ordering the right tyre and ordering the wrong one.

What the numbers on the sidewall mean for ford f-150 tyre size

A size code is a compact specification, and each part of it matters. Using 265/70R17 as the example from the Ford F-150:

Part of the code What it means Value for 265/70R17
265 (width) Tread width in millimetres 265 mm
70 (aspect ratio) Sidewall height as a percentage of the width 70%
R17 (rim) Wheel rim diameter in inches 17 in
108 (load index) Maximum load per tyre 1000 kg
T (speed rating) Maximum sustained speed 190 km/h (118 mph)

The width is the first number and the easiest to misread: it is the width of the tread in millimetres, measured on the specified rim width. The aspect ratio is a percentage, not a millimetre figure, so a 60-profile tyre has a sidewall 60% as tall as the tread is wide. The letter R means radial construction, which is what almost every modern road tyre uses. The load index and speed rating come after the size: a load index of 108 means each tyre is rated to carry up to 1000 kg, and a speed rating of T means the tyre is rated for sustained speeds up to 190 km/h (118 mph). Never fit a tyre with a lower load index or speed rating than the placard specifies — a higher rating is acceptable, a lower one is not. Once you can read the code, you can check any tyre on a Ford F-150 against the placard in under a minute.

Sizes commonly fitted to the Ford F-150

The sizes below are the ones most commonly seen on the Ford F-150 across its trim range (the usual trim range from XL and XLT up to Lariat, King Ranch and Platinum). They are labelled commonly fitted — confirm on your placard, because the size on your car depends on the wheels it left the factory with, and this list is not a stock-size claim for any single trim. Dimensions are nominal new-tyre figures from the tyre-size chart; real tyres vary slightly by brand, model, wear and inflation pressure.

Size Overall diameter Sidewall height Circumference Revs per mile
265/70R17 802.8 mm (31.6 in) 185.5 mm 2522.1 mm 638.1
275/55R20 810.5 mm (31.9 in) 151.2 mm 2546.3 mm 632.0

The diameter figures are worth comparing: 265/70R17 measures 802.8 mm across, while 275/55R20 measures 810.5 mm, a difference of +0.96%. That is well inside the ±3% guideline explained below, which is one reason both sizes appear on the same model range with different wheel options. A taller sidewall — 185.5 mm on the 265/70R17 against 151.2 mm on the 275/55R20 — generally gives a softer ride over bumps, while a shorter sidewall tends to sharpen steering response at the cost of comfort. Neither is better in every situation; the right choice is the one your placard specifies for your wheels. On the Ford F-150, both sizes appear because different trims left the factory on different wheels.

For the full dimensions of each size on the Ford F-150, see 265/70R17 tyre size, 275/55R20 tyre size.

ford f-150 tyre size: The ±3% rule for changing tyre size

If you are thinking about a different size — for winter tyres, a different wheel, or a replacement that is easier to find — the widely used guideline is that the replacement tyre's overall diameter should stay within ±3% of the original. Staying inside that band keeps the speedometer error small and avoids most clearance problems, but it is a guideline, not a safety approval: always confirm fitment with a tyre professional before fitting a different tyre size. On the Ford F-150, the same ±3% guideline is the one to work with.

Here is the maths for this model. Take 265/70R17 at 802.8 mm as the original size. Three percent of 802.8 mm is 24.1 mm, so the acceptable diameter band runs from 778.7 mm to 826.9 mm. The 275/55R20 at 810.5 mm sits +0.96% from the original, inside the band. A size outside the band would move the speedometer by more than 3%: at an indicated 60 mph the car would actually be travelling about 62.1 mph with a tyre 3.5% larger, which is enough to matter for speed limits and for the accuracy of the odometer. Diameter is only part of the story — width matters too, because a wider tyre needs clearance at full steering lock and under suspension compression, and a different rim width or offset can change where the tyre sits in the arch. The ±3% guideline is about the tyre's diameter, not the model — and it applies to the Ford F-150 exactly as it does to any other car.

Load index and speed rating for the Ford F-150

The placard lists a load index and a speed rating alongside the size, and both are minimums. The load index is a code for the maximum weight each tyre can carry: on this model the commonly specified index is 108, which corresponds to 1000 kg per tyre, or 4,000 kg across four tyres. That sounds like far more than the car weighs, and it is — the margin covers uneven loading, dynamic forces under braking and cornering, and the fact that a tyre's rated load falls as speed rises. If you regularly carry heavy loads or tow, the load index matters more, not less, and you should never fit a tyre rated below the placard figure. On the Ford F-150, the placard figure is the minimum whatever the load.

The speed rating works the same way on the Ford F-150. A T-rated tyre is rated for sustained speeds up to 190 km/h (118 mph), which is comfortably above any legal speed limit, but the rating also reflects how the tyre handles heat at sustained high speed. Fitting a lower speed rating than specified can affect your insurance as well as safety, because the car would no longer meet the specification the manufacturer certified. When you buy, check the full code on the sidewall of the new tyre — size, load index and speed rating together — against the placard, not just the size on its own. The placard's load index and speed rating are minimums on the Ford F-150 as on every car.

ford f-150 tyre size: Winter tyres, TPMS and the spare

Winter tyres are worth considering if your Ford F-150 regularly sees temperatures below about 7°C, because the rubber compound in a summer tyre hardens in the cold and loses grip. Winter tyres are usually fitted in the same size as the summer tyres, or sometimes one size narrower on the same rim diameter for better grip in snow — and the ±3% rule applies to winter sizes exactly as it does to summer ones. Whatever size you choose, fit winter tyres as a set of four; mixing winter tyres on one axle with summer tyres on the other changes the car's balance in exactly the conditions where you need it most. In the UK there is no legal requirement to fit winter tyres, but in parts of Europe they are mandatory in winter months, so check local rules before driving abroad. Winter tyres make a real difference on a Ford F-150 once temperatures stay below about 7°C.

Your Ford F-150 is fitted with a tyre pressure monitoring system (TPMS), which warns you when a tyre loses pressure. In the US, TPMS has been mandatory on new cars since 2007, and in the EU and UK it has been required on new type approvals since 2014, so a car of this age will have either direct sensors in the wheels or an indirect system that uses the ABS sensors. If you change wheels — for example fitting a second set for winter — the sensors may need to be transferred or relearned, and a tyre fitter can do this as part of the swap. Never ignore a TPMS warning: driving on a significantly under-inflated tyre damages the tyre, increases fuel consumption and, in the worst case, can cause a blowout.

Check the spare too. Some Ford F-150 cars carry a full-size spare, others a space-saver with a strict speed and distance limit printed on its sidewall, and some carry a repair kit instead of a spare at all. A space-saver is usually a different size from the road tyres and is only meant to get you to a tyre shop — typically no more than 50 mph and 50 miles, though the exact limit is printed on the tyre itself. Knowing which one you have before you need it is a five-minute job that saves a bad surprise at the roadside.

What to do if the placard and the fitted tyre disagree for ford f-150 tyre size

It happens more often than you might think: the placard says one size and the tyres on the car say another. The first step is to check whether the fitted size is within ±3% of the placard size in diameter — if it is, it may be a legitimate alternative the previous owner chose, but you should still have a tyre professional confirm that the width, load index and speed rating are appropriate and that the tyre clears the suspension and arches at full lock. If the difference is larger than 3%, or the load index or speed rating is below the placard figure, treat it as a problem to fix rather than a choice to keep: the speedometer will be reading wrong, the odometer will be recording the wrong mileage, and in some jurisdictions the car may not pass its roadworthiness inspection. A mismatch between placard and fitted tyre on a Ford F-150 is worth having a tyre professional check.

When you order replacements, give the fitter the size from the placard, not just the size on the old tyre — and if you are changing to a size that is different from the placard, say so explicitly so the fitter can check the alternative against the ±3% rule and the load and speed ratings. Keep the receipt and note the size fitted; it is useful the next time the tyres need replacing, and it is a record for the next owner too. On the Ford F-150, that note is the record the next owner will want as well.

Related pages for ford f-150 tyre size

Frequently asked questions

What tyre size does a Ford F-150 take?

It depends on the trim and the wheels fitted when the car was built — there is no single size for every Ford F-150. Check the placard on the driver's door jamb first; it lists the size specified for your car. The sizes most commonly seen on this model are 265/70R17, 275/55R20, each labelled commonly fitted and to be confirmed on your placard. Never rely on a website list alone when the placard disagrees with it.

Can I fit a different tyre size on my Ford F-150?

On a Ford F-150, you can consider a different size, but only within the ±3% diameter guideline and only after confirming the width, load index and speed rating with a tyre professional. For example, 275/55R20 is +0.96% different in diameter from 265/70R17, which is inside the guideline. Anything outside ±3% will throw the speedometer out by more than 3% and may cause clearance problems at full steering lock.

Where is the tyre size placard on a Ford F-150?

Open the driver's door of your Ford F-150 and look at the sticker on the door frame or B-pillar. It lists the tyre size and the recommended cold inflation pressures for the front and rear axles. If the sticker is worn or missing, the same information is in the owner's manual under wheels and tyres, and the size is also moulded into the sidewall of the tyre already fitted.

What load index and speed rating does a Ford F-150 need?

The placard on your Ford F-150 specifies both, and the commonly specified figures for this model are load index 108 (1000 kg per tyre) and speed rating T (up to 190 km/h (118 mph)). Never fit a tyre with a lower load index or speed rating than the placard specifies; a higher rating is acceptable. Check the full code on the new tyre's sidewall — size, load index and speed rating together — before it is fitted.

Do I need winter tyres for my Ford F-150?

Winter tyres are worth considering if your Ford F-150 regularly sees temperatures below about 7°C, because summer-tyre rubber hardens in the cold and loses grip. Fit them as a set of four, in the same size as the summer tyres or one size narrower within the ±3% rule, and remember that winter-tyre rules vary by country — some European countries require them in winter, while the UK does not.