295/30R18 tire size

A 295/30R18 tire is 24.97 inches (634.2 mm) tall, 11.61 in (295 mm) wide and fits a 18-inch wheel. In inch notation it is roughly a 25.0x11.6R18.

295/30R18 dimensions
Overall diameter24.97 in634.2 mm
Section width11.61 in295 mm
Sidewall height3.48 in88.5 mm
Circumference78.44 in1,992 mm
Revolutions807.7 per mile501.9 per km
Rim diameter18 in457.2 mm

Compare 295/30R18 with another size

Speed in

Overall diameter difference

−0.95%

60 mph on the speedometer = 59.4 mph actual

Within the ±3 % diameter range most tire fitters accept.

Ground clearance
−3.0 mm (−0.12 in)
Revolutions
808 → 815 per mile

295/30R18 285/30R18

Side-by-side dimensions

CurrentNewDifference%
Diameter24.97 in24.73 in−0.24 in−0.95%
Diameter634.2 mm628.2 mm−6.0 mm−0.95%
Width11.61 in11.22 in−0.39 in−3.39%
Width295.0 mm285.0 mm−10.0 mm−3.39%
Sidewall3.48 in3.37 in−0.12 in−3.39%
Sidewall88.5 mm85.5 mm−3.0 mm−3.39%
Circumference78.44 in77.70 in−0.74 in−0.95%
Revs per mile807.7 815.5 +7.7 +0.96%

Speedometer error

Speedometer showsActual speedDifference
20 mph19.8 mph−0.2 mph
30 mph29.7 mph−0.3 mph
40 mph39.6 mph−0.4 mph
50 mph49.5 mph−0.5 mph
60 mph59.4 mph−0.6 mph
70 mph69.3 mph−0.7 mph
80 mph79.2 mph−0.8 mph

Alternative sizes on the same 18-inch wheel

Sizes in use within ±3 % of the overall diameter of 295/30R18:

Plus and minus sizes for 295/30R18

SizeWheelDiameterDifference
265/40R17Minus 1 (17 in)25.35 in+1.51%
265/35R17Minus 1 (17 in)24.30 in−2.66%
275/40R17Minus 1 (17 in)25.66 in+2.78%
265/30R19Plus 1 (19 in)25.26 in+1.17%
275/30R19Plus 1 (19 in)25.50 in+2.11%

Vehicles approved with 295/30R18 tires

Models whose Swiss type approval lists 295/30R18 as a standard or optional size (10 approvals in total). Always check your own vehicle's placard or papers.

Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.

Nearby 18-inch sizes

Reading the 295/30R18 size

The load index and speed rating (for example 91V) follow the size on the sidewall. They must meet at least the values on your vehicle's tire placard.