225/70R15C tire size

A 225/70R15C (C = commercial / van) tire is 27.40 inches (696.0 mm) tall, 8.86 in (225 mm) wide and fits a 15-inch wheel. In inch notation it is roughly a 27.4x8.9R15.

225/70R15C dimensions
Overall diameter	27.40 in	696.0 mm
Section width	8.86 in	225 mm
Sidewall height	6.20 in	157.5 mm
Circumference	86.08 in	2,187 mm
Revolutions	736.0 per mile	457.3 per km
Rim diameter	15 in	381.0 mm

Compare 225/70R15C with another size

Current size

New size

Speed in mphkm/h

Overall diameter difference

−0.43%

60 mph on the speedometer = 59.7 mph actual

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

Ground clearance: −1.5 mm (−0.06 in)
Revolutions: 736 → 739 per mile

225/70R15C 195/80R15

Side-by-side dimensions

	Current	New	Difference	%
Diameter	27.40 in	27.28 in	−0.12 in	−0.43%
Diameter	696.0 mm	693.0 mm	−3.0 mm	−0.43%
Width	8.86 in	7.68 in	−1.18 in	−13.33%
Width	225.0 mm	195.0 mm	−30.0 mm	−13.33%
Sidewall	6.20 in	6.14 in	−0.06 in	−0.95%
Sidewall	157.5 mm	156.0 mm	−1.5 mm	−0.95%
Circumference	86.08 in	85.71 in	−0.37 in	−0.43%
Revs per mile	736.0	739.2	+3.2	+0.43%

Speedometer error

Speedometer shows	Actual speed	Difference
20 mph	19.9 mph	−0.1 mph
30 mph	29.9 mph	−0.1 mph
40 mph	39.8 mph	−0.2 mph
50 mph	49.8 mph	−0.2 mph
60 mph	59.7 mph	−0.3 mph
70 mph	69.7 mph	−0.3 mph
80 mph	79.7 mph	−0.3 mph

Alternative sizes on the same 15-inch wheel

Sizes in use within ±3 % of the overall diameter of 225/70R15C:

Plus and minus sizes for 225/70R15C

Size	Wheel	Diameter	Difference
205/70R16	Plus 1 (16 in)	27.30 in	−0.37%
225/65R16	Plus 1 (16 in)	27.52 in	+0.42%
245/60R16	Plus 1 (16 in)	27.57 in	+0.63%
235/60R16	Plus 1 (16 in)	27.10 in	−1.09%
205/65R17	Plus 2 (17 in)	27.49 in	+0.33%
245/55R17	Plus 2 (17 in)	27.61 in	+0.76%
235/55R17	Plus 2 (17 in)	27.18 in	−0.82%
225/60R17	Plus 2 (17 in)	27.63 in	+0.83%
265/45R18	Plus 3 (18 in)	27.39 in	−0.04%
215/55R18	Plus 3 (18 in)	27.31 in	−0.33%
235/50R18	Plus 3 (18 in)	27.25 in	−0.55%
195/60R18	Plus 3 (18 in)	27.21 in	−0.69%

Vehicles approved with 225/70R15C tires

Models whose Swiss type approval lists 225/70R15C as a standard or optional size (665 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 15-inch sizes

Reading the 225/70R15C size

225 — section width in millimetres (8.86 in).
70 — aspect ratio: the sidewall is 70 % of the width, 157.5 mm.
R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
15 — fits a 15-inch diameter wheel.
C — commercial (van) construction with a higher load capacity at higher pressure.

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.