tireheight.com

225/60R18 in inches

A 225/60R18 tire is 28.6″ tall and 8.9″ wide, and fits a 18″ wheel. In inches it is written 28.6×8.9R18.

Diameter28.63″
Width8.86″
Sidewall5.31″
225/60R18 drawn to scale: 28.63 inch diameter, 5.31 inch sidewall, 18 inch wheel, 8.86 inch tread width18″ wheel5.31″28.63″ overall8.86″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 225/60R18 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 30 tires in this size. Their published revolutions per mile work out to 27.7–27.8″ under load (below).

Real 225/60R18 tires measure 28.60–28.62″, against 28.63″ from the size code. They run both taller and shorter than the size code.

Height under load27.7–27.8″

Published revs per mile (726–727) mean the tire rolls like a 27.7–27.8″ tire on the vehicle. Use this for speedometer calibration.

Weight spread24.6–34.8 lb

The lightest (General AltiMAX RT45, SL) is 10.2 lb lighter per corner than the heaviest (Michelin Primacy MXM4, XL).

30 tires in 225/60R18

Sort by the spec you care about.

LoadRevs/miSource
General AltiMAX RT45TouringSL · 100H28.6024.611.01,764726Spec page
Michelin Primacy All SeasonTouringSL · 100H28.6025.48.51,764727Spec page
Michelin Primacy All SeasonTouringSL · 100H28.6025.68.51,764727Spec page
General AltiMAX365 AWTouringSL · 100H28.6025.711.01,764726Spec page
Michelin Primacy All SeasonTouringXL · 104H28.6025.98.51,984727Spec page
Michelin Pilot Sport 4 SUVPerformanceSL · 100V28.6026.59.51,764727Spec page
Michelin Pilot Alpin 5WinterXL · 104H28.6227.19.01,984727Spec page
Michelin Primacy Tour A/STouringSL · 100H28.6027.19.01,764727Spec page
Michelin CrossClimate2All-seasonXL · 104H28.6027.210.01,984727Spec page
Michelin Defender2All-seasonXL · 104H28.6227.810.51,984727Spec page
General G-MAX JusticePerformanceSL · 100W28.6027.910.01,764726Spec page
General G-MAX Justice AWAll-weatherSL · 100V28.6027.910.01,764726Spec page
Michelin Primacy Tour A/STouringSL · 100V28.6028.49.01,764727Spec page
BFGoodrich Advantage ControlAll-seasonSL · 100H28.6228.611.51,764727Spec page
BFGoodrich Advantage ControlAll-seasonSL · 100V28.6228.610.51,764727Spec page
Toyo Celsius SportPerformanceXL · 104W28.6228.710.11,984726Spec page
Toyo Extensa A/S IIAll-seasonSL · 100H28.6228.911.51,764726Spec page
Michelin X-Ice Snow+WinterXL · 104H28.6229.210.51,984727Spec page
Toyo Celsius IITouringSL · 100H28.6229.311.51,764726Spec page
Michelin X-Ice SnowWinterSL · 100H28.6229.410.51,764727Spec page
General AltiMAX Arctic XWinterXL · 104T28.6029.521.01,984726Spec page
Toyo Proxes G-TourXL · 104V28.6029.511.81,984726Spec page
Toyo Observe G3-IceWinterXL · 104T28.6230.411.31,984726Spec page
Toyo Observe G3-IceWinterSL · 100T28.6230.411.31,764726Spec page
Toyo Open Country A/T IIIAll-terrainXL · 104T28.6231.512.81,984726Spec page
BFGoodrich Elite-Force T/AAll-seasonXL · 104W28.6231.810.01,984727Spec page
BFGoodrich Trail-Terrain T/AAll-terrainSL · 100H28.6033.312.51,764727Spec page
Michelin Pilot Alpin 5WinterXL · 104H28.6233.710.51,984727Spec page
BFGoodrich Trail-Terrain T/A+SL · 100H28.6034.212.51,764727Spec page
Michelin Primacy MXM4TouringXL · 104H28.6034.88.51,984727Spec page

Is 225/60R18 a 29-inch tire?

≈29″

Close. The size code works out to 28.63″, and the 30 tires here publish 28.60–28.62″, so people call it a 29.

All 29-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 225/60R18Difference
235/55R1828.18-0.45″-1.6%
295/45R1828.45-0.18″-0.6%
225/65R1728.52-0.11″-0.4%
245/60R1728.57-0.06″-0.2%
245/55R1828.61-0.02″-0.1%
245/50R1928.65+0.02″+0.1%
225/55R1928.74+0.11″+0.4%
275/45R1928.74+0.11″+0.4%
255/55R1829.04+0.41″+1.4%
235/60R1829.10+0.47″+1.7%

How to read 225/60R18

How to read any tire size

225/60R18 100H as printed on the tire sidewall, with each part numbered225/60R18 100H123456
How 225/60R18 100H is printed on the sidewall. It's the most common code among the 30 tires here (11 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

260Aspect ratio

A percentage, not a measurement: the sidewall is 60% as tall as the tire is wide, which is 135.0 mm or 5.31 inches.

3RConstruction

Radial construction.

418Wheel diameter

Mounts on a 18-inch wheel. Approved wheel widths run 6.0″ to 8.0″.

5100Load index

Each tire carries up to 1,764 lb (800 kg) at its maximum pressure.

6HSpeed rating

Rated for up to 130 mph sustained.

SpecificationInchesMetric
Overall diameter28.63727 mm
Section width8.86225 mm
Sidewall height5.31135.0 mm
Circumference89.92,285 mm
Revolutions per mile (calculated, unloaded)704.4438 per km
Revolutions per mile (published by manufacturers)726–727451–452 per km
Approved wheel width6.0–8.0152–203 mm

Speedometer error after switching to 225/60R18

Your actual speed– mph

Questions about 225/60R18

What is 225/60R18 in inches?

28.63 inches tall, 8.86 inches wide, on a 18-inch wheel. Written in inches, that is roughly 28.6×8.9R18.

How much does a 225/60R18 tire weigh?

Between 24.6 lb and 34.8 lb for the 30 tires listed here. The lightest is the General AltiMAX RT45 (SL); the heaviest is the Michelin Primacy MXM4 (XL).

What wheel width do I need for 225/60R18?

Manufacturers approve 6.0–8.0″ wide wheels for this size.

How many revolutions per mile does a 225/60R18 make?

Published figures run 726–727 revolutions per mile. The calculated figure is 704.4, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 225/60R18 than 245/55R18?

0.02 inches taller on paper (28.63″ vs 28.61″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.