tireheight.com

235/45R17 in inches

A 235/45R17 tire is 25.3″ tall and 9.3″ wide, and fits a 17″ wheel. In inches it is written 25.3×9.3R17.

Diameter25.33″
Width9.25″
Sidewall4.16″
235/45R17 drawn to scale: 25.33 inch diameter, 4.16 inch sidewall, 17 inch wheel, 9.25 inch tread width17″ wheel4.16″25.33″ overall9.25″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 235/45R17 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 20 tires in this size. Their published revolutions per mile work out to 24.6–24.7″ under load (below).

Real 235/45R17 tires measure 25.30–25.50″, against 25.33″ from the size code. They run both taller and shorter than the size code.

  1. Michelin Pilot Sport All-Season 425.50″ +0.17″
  2. Michelin Pilot Sport 4 S25.40″ +0.07″
  3. Toyo Proxes Sport 225.40″ +0.07″
  4. Toyo Celsius25.35″ +0.03″
  5. Toyo Celsius II25.35″ +0.03″
  6. Toyo Celsius Sport25.35″ +0.03″
  7. Toyo Extensa HP II25.35″ +0.03″
  8. Toyo Observe G3-Ice25.35″ +0.03″
  9. Toyo Proxes R888R25.35″ +0.03″
  10. Toyo Proxes Sport A/S25.35″ +0.03″
  11. BFGoodrich Advantage Control · 225.35″ +0.02″
  12. BFGoodrich g-Force COMP-2 A/S PLUS25.35″ +0.02″
  13. Michelin X-Ice Snow25.35″ +0.02″
  14. Toyo Proxes R1R25.35″ +0.02″
  15. General AltiMAX Arctic X25.30″ −0.03″
  16. General AltiMAX RT4525.30″ −0.03″
  17. General AltiMAX365 AW25.30″ −0.03″
  18. General G-MAX AS0725.30″ −0.03″
  19. General G-MAX RS25.30″ −0.03″
Each bar runs from the size code's 25.33″ (the orange line) to the model's published height. The track spans 1.0″. Where a model comes in several load ranges, the darker part shows its range of heights; the number after the name is how many versions it comes in.
Height under load24.6–24.7″

Published revs per mile (817–821) mean the tire rolls like a 24.6–24.7″ tire on the vehicle. Use this for speedometer calibration.

Weight spread21.2–30.6 lb

The lightest (General G-MAX RS, SL) is 9.4 lb lighter per corner than the heaviest (Toyo Proxes Sport A/S, XL).

20 tires in 235/45R17

Sort by the spec you care about.

LoadRevs/miSource
General G-MAX RSPerformanceSL · 94W25.3021.210.01,477820Spec page
General AltiMAX365 AWTouringXL · 97V25.3021.911.01,609820Spec page
Michelin Pilot Sport 4 SPerformanceXL · 97(Y)25.4022.29.51,609821Spec page
Toyo Proxes Sport 2PerformanceXL · 97Y25.4022.39.21,609819Spec page
Toyo Celsius SportPerformanceXL · 97W25.3522.49.81,609819Spec page
Toyo Extensa HP IIPerformanceXL · 97W25.3522.59.41,609819Spec page
Toyo CelsiusAll-weatherXL · 97V25.3523.410.51,609819Spec page
Toyo Celsius IITouringXL · 97V25.3523.411.21,609819Spec page
Michelin X-Ice SnowWinterXL · 97H25.3523.410.51,609821Spec page
Toyo Proxes R1RPerformanceSL · 94W25.3523.68.21,477820Spec page
General G-MAX AS07PerformanceSL · 94W25.3023.810.01,477820Spec page
General AltiMAX RT45TouringXL · 97H25.3024.411.01,609820Spec page
Toyo Proxes R888RPerformanceSL · 94W25.3524.96.31,477819Spec page
BFGoodrich Advantage ControlAll-seasonXL · 97H25.3525.111.51,609821Spec page
Michelin Pilot Sport All-Season 4PerformanceXL · 97Y25.5025.110.01,609817Spec page
BFGoodrich Advantage ControlAll-seasonXL · 97W25.3525.710.51,609821Spec page
General AltiMAX Arctic XWinterXL · 97T25.3025.712.01,609820Spec page
BFGoodrich g-Force COMP-2 A/S PLUSPerformanceXL · 97W25.3526.09.01,609821Spec page
Toyo Observe G3-IceWinterSL · 94T25.3526.011.31,477819Spec page
Toyo Proxes Sport A/SPerformanceXL · 97W25.3530.69.81,609819Spec page

Is 235/45R17 a 25-inch tire?

≈25″

Close. The size code works out to 25.33″, and the 20 tires here publish 25.30–25.50″, so people call it a 25.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 235/45R17Difference
225/45R1724.97-0.35″-1.4%
255/40R1725.03-0.30″-1.2%
205/50R1725.07-0.26″-1.0%
265/40R1725.35+0.02″+0.1%
215/50R1725.46+0.14″+0.5%
275/40R1725.66+0.33″+1.3%
245/45R1725.68+0.35″+1.4%
315/35R1725.68+0.35″+1.4%
225/50R1725.86+0.53″+2.1%
205/55R1725.88+0.55″+2.2%

How to read 235/45R17

How to read any tire size

235/45R17 97W as printed on the tire sidewall, with each part numbered235/45R17 97W123456
How 235/45R17 97W is printed on the sidewall. It's the most common code among the 20 tires here (5 of them); tires in this size come in other load and speed ratings too.
1235Section width

235 mm across the widest point, or 9.25 inches. Every 235 size

245Aspect ratio

A percentage, not a measurement: the sidewall is 45% as tall as the tire is wide, which is 105.8 mm or 4.16 inches.

3RConstruction

Radial construction.

417Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 7.5″ to 9.0″.

597Load index

Each tire carries up to 1,609 lb (730 kg) at its maximum pressure.

6WSpeed rating

Rated for up to 168 mph sustained.

XLExtra load

Printed after the size. In this size the XL tires carry up to 1,609 lb each and the standard-load tires up to 1,477 lb, as published.

SpecificationInchesMetric
Overall diameter25.33643 mm
Section width9.25235 mm
Sidewall height4.16105.8 mm
Circumference79.62,021 mm
Revolutions per mile (calculated, unloaded)796.3495 per km
Revolutions per mile (published by manufacturers)817–821508–510 per km
Approved wheel width7.5–9.0191–229 mm

Speedometer error after switching to 235/45R17

Your actual speed– mph

Questions about 235/45R17

What is 235/45R17 in inches?

25.33 inches tall, 9.25 inches wide, on a 17-inch wheel. Written in inches, that is roughly 25.3×9.3R17.

How much does a 235/45R17 tire weigh?

Between 21.2 lb and 30.6 lb for the 20 tires listed here. The lightest is the General G-MAX RS (SL); the heaviest is the Toyo Proxes Sport A/S (XL).

What wheel width do I need for 235/45R17?

Manufacturers approve 7.5–9.0″ wide wheels for this size.

How many revolutions per mile does a 235/45R17 make?

Published figures run 817–821 revolutions per mile. The calculated figure is 796.3, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 235/45R17 than 205/50R17?

0.26 inches taller on paper (25.33″ vs 25.07″), which raises the axle about 0.13″. Your speedometer will read about 1.0% slow.