tireheight.com

225/45R17 in inches

A 225/45R17 tire is 25.0″ tall and 8.9″ wide, and fits a 17″ wheel. In inches it is written 25.0×8.9R17.

Diameter24.97″
Width8.86″
Sidewall3.99″
225/45R17 drawn to scale: 24.97 inch diameter, 3.99 inch sidewall, 17 inch wheel, 8.86 inch tread width17″ wheel3.99″24.97″ overall8.86″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 225/45R17 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 28 tires in this size. Their published revolutions per mile work out to 24.2″ under load (below).

Real 225/45R17 tires measure 24.90–25.00″, against 24.97″ from the size code. They run both taller and shorter than the size code.

Height under load24.2″

Published revs per mile (832–833) mean the tire rolls like a 24.2″ tire on the vehicle. Use this for speedometer calibration.

Weight spread20.4–24.7 lb

The lightest (General AltiMAX RT45, XL) is 4.3 lb lighter per corner than the heaviest (BFGoodrich g-Force Phenom T/A, XL).

28 tires in 225/45R17

Sort by the spec you care about.

LoadRevs/miSource
General AltiMAX RT45TouringXL · 94V25.0020.411.01,477832Spec page
General AltiMAX365 AWTouringXL · 94V25.0020.411.01,477832Spec page
General G-MAX RSPerformanceSL · 91W25.0020.910.01,356832Spec page
Toyo Proxes Sport 2PerformanceXL · 94(Y)25.0020.99.11,477832Spec page
Toyo Extensa HP IIPerformanceXL · 94W24.9621.29.31,477832Spec page
Michelin Pilot Sport 4 SPerformanceXL · 94(Y)25.0021.29.51,477833Spec page
Toyo Proxes RPerformanceSL · 91W24.9621.43.61,356832Spec page
Toyo Celsius SportPerformanceXL · 94W24.9621.69.71,477832Spec page
Toyo Celsius IITouringXL · 94V24.9622.011.11,477832Spec page
General AltiMAX Arctic XWinterXL · 94T25.0022.012.01,477832Spec page
General AltiMAX RT45TouringSL · 91H25.0022.111.01,356832Spec page
General G-MAX AS07PerformanceSL · 91W25.0022.210.01,356832Spec page
Toyo Extensa A/S IIAll-seasonXL · 94H24.9622.311.51,477832Spec page
Toyo Proxes SportPerformanceXL · 94Y24.9622.39.31,477832Spec page
BFGoodrich Advantage ControlAll-seasonSL · 91H24.9622.611.51,356833Spec page
Michelin CrossClimate2All-seasonSL · 91V24.9022.710.01,356833Spec page
Toyo Proxes Sport RPerformanceXL · 94W25.0022.97.21,477832Spec page
Toyo Proxes G-TourXL · 94V25.0022.99.11,477832Spec page
Michelin X-Ice SnowWinterXL · 94H24.9623.410.51,477833Spec page
Toyo Observe G3-IceWinterSL · 91T24.9623.611.31,356832Spec page
Michelin Pilot Sport All-Season 4PerformanceXL · 94Y25.0023.810.01,477833Spec page
Toyo Proxes R1RPerformanceSL · 91W24.9623.88.11,356832Spec page
Toyo Proxes R888RPerformanceXL · 94W24.9624.36.31,477832Spec page
BFGoodrich g-Force Rival+PerformanceSL · 91V24.9624.47.21,356833Spec page
BFGoodrich g-Force Rival SPerformanceSL · 91V24.9624.57.21,356833Spec page
Toyo Proxes Sport A/SPerformanceXL · 94W24.9624.59.71,477832Spec page
BFGoodrich g-Force COMP-2 A/S PLUSPerformanceXL · 94W24.9624.69.01,477833Spec page
BFGoodrich g-Force Phenom T/APerformanceXL · 94W24.9624.79.01,477833Spec page

Is 225/45R17 a 25-inch tire?

≈25″

Yes. The size code works out to 24.97″, and the 28 tires here publish 24.90–25.00″, so people call it a 25.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 225/45R17Difference
205/45R1724.26-0.71″-2.8%
235/40R1724.40-0.57″-2.3%
215/45R1724.62-0.35″-1.4%
245/40R1724.72-0.26″-1.0%
255/40R1725.03+0.06″+0.2%
205/50R1725.07+0.10″+0.4%
235/45R1725.33+0.35″+1.4%
265/40R1725.35+0.37″+1.5%
215/50R1725.46+0.49″+2.0%
275/40R1725.66+0.69″+2.8%

How to read 225/45R17

How to read any tire size

225/45R17 94W as printed on the tire sidewall, with each part numbered225/45R17 94W123456
How 225/45R17 94W is printed on the sidewall. It's the most common code among the 28 tires here (7 of them); tires in this size come in other load and speed ratings too.
1225Section width

225 mm across the widest point, or 8.86 inches. Every 225 size

245Aspect ratio

A percentage, not a measurement: the sidewall is 45% as tall as the tire is wide, which is 101.3 mm or 3.99 inches.

3RConstruction

Radial construction.

417Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 7.0″ to 8.5″.

594Load index

Each tire carries up to 1,477 lb (670 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 1,477 lb each and the standard-load tires up to 1,356 lb, as published.

SpecificationInchesMetric
Overall diameter24.97634 mm
Section width8.86225 mm
Sidewall height3.99101.3 mm
Circumference78.51,993 mm
Revolutions per mile (calculated, unloaded)807.6502 per km
Revolutions per mile (published by manufacturers)832–833517–518 per km
Approved wheel width7.0–8.5178–216 mm

Speedometer error after switching to 225/45R17

Your actual speed– mph

Questions about 225/45R17

What is 225/45R17 in inches?

24.97 inches tall, 8.86 inches wide, on a 17-inch wheel. Written in inches, that is roughly 25.0×8.9R17.

How much does a 225/45R17 tire weigh?

Between 20.4 lb and 24.7 lb for the 28 tires listed here. The lightest is the General AltiMAX RT45 (XL); the heaviest is the BFGoodrich g-Force Phenom T/A (XL).

What wheel width do I need for 225/45R17?

Manufacturers approve 7.0–8.5″ wide wheels for this size.

How many revolutions per mile does a 225/45R17 make?

Published figures run 832–833 revolutions per mile. The calculated figure is 807.6, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 225/45R17 than 245/40R17?

0.26 inches taller on paper (24.97″ vs 24.72″), which raises the axle about 0.13″. Your speedometer will read about 1.0% slow.