Tire size meaning

245/65 R17

What the numbers on a 245/65 R17 tire actually mean — width, sidewall, construction and rim — explained in plain language with real-world driving context.

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Direct answer

What does 245/65 R17 mean?

245/65 R17 is a metric tire size: 245 mm wide, a sidewall 65% of that width (159 mm), radial construction, fitted to a 17-inch wheel. Overall diameter ≈ 750 mm.

245
Section width in mm (sidewall to sidewall).
65
Aspect ratio — sidewall is 65% of width (159 mm).
R
Radial construction — the modern layered build.
17
Wheel rim diameter in inches (432 mm).

Ø 750 mm · 29.54″ · 424 revs/km

Section width 245 mmSidewall 159 mmR17 (432 mm)Ø 750 mm (29.54″)

Dimensional breakdown

Section width
245 mm
Aspect ratio
65%
Sidewall height
159.3 mm
Rim diameter
17″ (431.8 mm)
Overall diameter
750 mm
Circumference
2.357 m
Revs per km
424
Construction
Radial (R)

What 245/65 R17 feels like on the road

A 245/65 R17 tire is a tall-sidewall comfort or off-road profile. With a sidewall of 159 mm, it absorbs bumps and rough surfaces well, ideal for comfort cruisers, SUVs and light off-road use.

The 245 mm contact width delivers maximum contact patch for high-performance and SUV applications. Combined with a 17-inch wheel, this size is most commonly found on mid-size sedans, sport trims and modern crossovers.

At highway speed each tire completes about 424 revolutions per kilometre — the figure your speedometer and ABS were calibrated against if 245/65 R17 is the OEM specification.

Common alternatives to 245/65 R17

Sizes within ±3% overall diameter — generally safe swaps for speedometer accuracy and clearance. Click any size to open a full side-by-side comparison.

Driver feel · telemetry

What 245/65 R17 usually feels like

A driver-perspective read on this size — steering, comfort, highway stability and rough-road behavior.

Steering feel

Softer, more relaxed turn-in

More sidewall flex before grip arrives — comfort-tuned, calm at speed.

Ride comfort

Softer over potholes

Tall sidewall absorbs expansion joints and broken tarmac — great for long drives.

Highway stability

Planted at highway speed

Wider contact patch resists crosswinds and tramlining — strong straight-line confidence.

Pothole comfort

Forgiving over impacts

Sidewall cushions the rim from sharp edges — ideal for poor roads.

Sporty vs OEM tone

Comfort-leaning OEM setup

Tuned for ride quality and economy over outright bite.

Sidewall159 mm
Ø750 mm
Width245 mm
Revs/km424

Related tire sizes for 245/65 R17

Explore neighbouring sizes by intent — similar, wider, lower-profile, OEM-safe, or aggressive. Each link opens a full side-by-side comparison.

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Frequently asked questions