265/35R22 Tyre Size: Dimensions, Alternatives & Speedometer Effect

A 265/35R22 tyre is 265 mm wide, has an aspect ratio of 35% and fits a 22-inch rim. Worked through, that gives an overall diameter of 744.3 mm (29.3 inches), a sidewall height of 92.8 mm, a circumference of 2338.3 mm and 688.3 revolutions per mile. Those four numbers are the whole story of this size: they decide how tall the tyre stands, how far the car travels on each revolution, and how far the speedometer reading can drift if you change size. This page lays out the exact figures, explains what each one means in plain language, and shows the closest alternative sizes so you can judge a swap with numbers instead of guesswork.

This is a measurement page, not a recommendation. Whether a 265/35R22 belongs on your car depends on the placard figure, the load index and the speed rating your vehicle requires — none of which a diameter table can settle on its own. What the table can do is give you the exact size of this tyre (744.3 mm diameter, 92.8 mm sidewall, 2338.3 mm circumference) so that any comparison you make is grounded in real numbers. Work through the alternative-size table and the speedometer section before deciding anything, and treat the plus-or-minus 3% guideline as what it is: a rule of thumb, not an approval.

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.

What does 265/35R22 mean?

There are only three numbers to decode. Width: 265 mm. Aspect ratio: 35%, which fixes the sidewall at 265 x 35/100 = 92.8 mm. Rim: 22 inches, or 558.8 mm. The diameter is the rim diameter plus the sidewall top and bottom, giving 744.3 mm in total. Because the aspect ratio is a percentage of the width, a wider tyre with the same aspect ratio is also a taller tyre — a point that catches people out when they go wider without dropping the aspect ratio to compensate.

265/35R22 dimensions

Measurement Value
Overall diameter 744.3 mm (29.3 in)
Sidewall height 92.8 mm
Circumference 2338.3 mm
Revolutions per mile 688.3
Rim diameter 22 in

Start with the circumference: 2338.3 mm per revolution. That is the distance your car covers every time this tyre turns once, and it is what makes the revs-per-mile figure (688.3) what it is — a mile divided by the circumference. Fit a tyre with a larger circumference and each revolution carries you further, so at the same wheel speed the car is moving faster than the instruments report. The sidewall (92.8 mm) is the flexible part: it absorbs the first shock from bumps and potholes, and a low-profile sidewall like this one means a short, stiff sidewall that sharpens steering response but leaves less cushioning over potholes and kerbs. These are nominal new-tyre dimensions, and real tyres vary slightly by brand, model, wear and inflation pressure.

Closest alternative sizes to 265/35R22

If you are looking for a substitute, start here. These are the three nearest sizes by overall diameter, limited to rims within one inch of 22 inches so the wheel itself stays realistic. 305/35R21 is the nearest at +0.3% (+2.6 mm difference). Anything within plus or minus 3% is generally treated as acceptable from a speedometer point of view, but diameter is only one of the checks: the replacement also needs the right load index and speed rating, and enough clearance around the suspension and arches at full steering lock.

Alternative size Diameter Sidewall Diameter difference Within ±3% guideline?
305/35R21 746.9 mm (29.4 in) 106.8 mm +0.3% Within the guideline
295/35R21 739.9 mm (29.1 in) 103.2 mm -0.6% Within the guideline
255/40R21 737.4 mm (29.0 in) 102.0 mm -0.9% Within the guideline

Speedometer effect of changing from 265/35R22

Here is what the diameter difference does on the road. The speedometer assumes the original circumference, so a +0.3% diameter change from fitting 305/35R21 shifts every reading by the same percentage. Indicated 30 mph becomes 30.1 mph in reality, indicated 50 mph becomes 50.2 mph, and indicated 70 mph becomes 70.2 mph. The odometer drifts by the same percentage too, which also affects recorded mileage over time. If the difference were larger than 3%, recalibration would be worth discussing with a specialist rather than ignored.

Replacement size Diameter change Actual speed at 30 mph indicated Actual speed at 50 mph indicated Actual speed at 70 mph indicated
305/35R21 +0.3% 30.1 mph 50.2 mph 70.2 mph
295/35R21 -0.6% 29.8 mph 49.7 mph 69.6 mph
255/40R21 -0.9% 29.7 mph 49.5 mph 69.4 mph

Wider, narrower or taller than 265/35R22: what actually changes

On this page, 265/35r22 tyre size is the case in point: Three things move when the size moves. Diameter drives the speedometer and the gearing: taller means the engine revs slightly lower at cruising speed, shorter means it revs slightly higher. Width drives grip and rolling resistance: this tyre is wide, a broad contact patch, which generally means more grip in the dry and more resistance to aquaplaning when the tread is in good condition. Sidewall height drives comfort and response: at 92.8 mm this is a low-profile tyre, a short, stiff sidewall that sharpens steering response but leaves less cushioning over potholes and kerbs. Small changes in any one of these are usually barely noticeable; combined changes — much wider and much taller at once — are where the car's behaviour and the speedometer both start to shift in ways that need checking rather than assuming.

How to check 265/35R22 fits your vehicle

The checks are the same whatever size you are considering. First, the door-jamb placard: size, load index and speed rating. Second, the rim: a 22-inch rim of the right width for a 265 mm tyre. Third, clearance — arches, suspension components and steering lock, with the car loaded as it will actually be used. Fourth, the pressure-monitoring system, which may need a reset or new sensors after a change. Fifth, the spare: if the spare is a different size, know its speed and distance limits before you need it. None of these is a formality, and together they are what turns a calculation into a safe fitment. For the 265/35R22, the 265 mm width and 92.8 mm sidewall are part of that same check.

Mistakes to avoid with 265/35R22

People go wrong in a handful of predictable ways. They trust the fitted tyre instead of the placard. They pick a wider tyre and forget the aspect ratio, so the diameter creeps up. They match the size code but buy a lower load index or speed rating. They mix sizes across an axle. They forget to check clearance at full steering lock, where a tyre that clears going straight can still rub. Each of these is easy to avoid once you know to look for it, and the tables on this page give you the numbers to check against. On a 265/35R22 the figures to check are a 744.3 mm diameter, a 92.8 mm sidewall and 688.3 revs per mile.

Related 265/35R22 sizes and tools

Frequently asked questions

What is the overall diameter of a 265/35R22 tyre?

The overall diameter of a new 265/35R22 tyre is 744.3 mm, which is 29.3 inches. That is the rim diameter (558.8 mm) plus twice the sidewall height (92.8 mm). It is a nominal figure, so an individual tyre can vary slightly by brand, model, wear and inflation pressure.

How tall is the sidewall on a 265/35R22 tyre?

For 265/35r22 tyre size, the point is this: The sidewall is 92.8 mm tall, because the aspect ratio is 35% of the 265 mm width (265 x 35/100 = 92.8 mm). A low-profile sidewall like this one means a short, stiff sidewall that sharpens steering response but leaves less cushioning over potholes and kerbs. The sidewall height is the main thing that decides how much cushioning the tyre gives over bumps.

How many revolutions per mile does a 265/35R22 tyre do?

A 265/35R22 tyre completes 688.3 revolutions per mile, based on its 2338.3 mm circumference. That figure matters because the speedometer and odometer count revolutions: fit a tyre with a different circumference and the readings drift by the same percentage as the diameter change.

What is the closest alternative size to 265/35R22?

The closest size in the chart is 305/35R21, which differs in diameter by +0.3% (+2.6 mm). The commonly used guideline is to stay within plus or minus 3% of the original diameter, and the alternative table on this page shows which sizes meet that. Diameter is only one check, though — load index, speed rating and physical clearance still need confirming.

Will changing from 265/35R22 affect my speedometer?

Yes. The speedometer assumes the original circumference, so a diameter change shifts every reading by the same percentage. Fitting 305/35R21 instead of 265/35R22 changes the diameter by +0.3%, so an indicated 70 mph would really be 70.2 mph. Keep the diameter within plus or minus 3% to keep that error small, and check the placard before fitting anything different.