T185/55R18 Spare Tire

T185/55R18 is a spare tire with a radial construction that requires a 18" wheel. It is designed to provide temporary mobility for your vehicle in the event of a flat tire due to puncture. T185/55R18 spare fits a variety of vehicles with tire diameter range of 25.2" to 26.8" tall.

If you need a spare tire cover, you need to know the tire diameter. T185/55R18 spare has a diameter of 26 inches.

T185/55R18 spare is also available in bias or diagonal ply construction as T185/55D18.

How to read T185/55R18 spare tire size?

T185/55R18 is a Temporary Spare tire that is designed as a short term solution intended for emergency use only. Let's take a closer look at each aspect of T185/55R18 tire dimensions.

T stands for temporary spare tire type. 185 is the width of the tire in millimeters. This tire is 185 mm wide from one sidewall to the other. 55 is the aspect ratio. It represents the height of the sidewall as a percentage of the tire's width. In this case, the sidewall height of the tire is 55% of its width. 18 is the diameter of the wheel in inches. This tire is designed to fit on a 18-inch wheel.

What tires can be temporarily replaced with a T185/55R18 spare?

T185/55R18 spare should only be used as a replacement for a tire of similar size. Since this is a 18-inch tire, it should ideally be used as a replacement for another 18-inch tire. However, it could potentially be used as a temporary replacement for any tire, as long as its overall diameter is not significantly different from the original tire.

It is important to note that spare tires have a speed limit, and should not be driven for long distances.

OEM Tire Size	Diameter Differential
185R14	-0.2%
P215/70R14	-0.5%
P225/70R14	1.7%
P205/75R14	0.5%
205/70R14	-2.6%
P205/70R14	-2.6%
P195/75R14	-2%
P215/75R14	2.6%
225/65R15	1.8%
P205/65R15	-2.1%
225/60R15	-1.5%
P205/70R15	1.2%
P195/75R15	1.8%
P215/65R15	0%
P195/70R15	-0.9%
P225/60R15	-1.5%
P245/60R15	2.1%
205/65R15	-2.1%
205/70R15	1.2%
P235/60R15	0.3%
235/60R15	0.3%
P225/55R16	-1.1%
255/50R16	0.2%
245/55R16	2.3%
245/50R16	-1.4%
P205/60R16	-1.4%
P225/60R16	2.3%
P205/65R16	1.7%
P215/60R16	0.5%
P245/50R16	-1.4%
P215/55R16	-2.9%
P235/55R16	0.5%
225/55R16	-1.1%
215/55R16	-2.9%
205/65R16	1.7%
215/60R16	0.5%
235/50R16	-2.9%
225/60R16	2.3%
205/60R16	-1.4%
P245/50R17	2.6%
235/45R17	-2.6%
195/60R17	0.8%
P255/45R17	0.2%
225/55R17	2.9%
215/55R17	1.1%
P245/45R17	-1.4%
P235/45R17	-2.6%
P225/50R17	-0.5%
P235/50R17	1.1%
245/45R17	-1.4%
215/50R17	-2%
P215/55R17	1.1%
225/50R17	-0.5%
P215/50R17	-2%
P265/40R17	-2.6%
335/35R17	0.8%
P225/55R17	2.9%
255/45R17	0.2%
285/40R17	-0.2%
245/50R17	2.6%
P315/35R17	-1.4%
265/40R17	-2.6%
235/50R17	1.1%
205/55R17	-0.5%
275/40R17	-1.4%
P275/40R17	-1.4%
P285/40R17	-0.2%
P275/40R18	2.4%
P295/35R18	0.3%
P235/45R18	1.2%
P275/35R18	-1.8%
335/30R18	-0.3%
215/45R18	-1.5%
315/30R18	-2.1%
295/35R18	0.3%
285/35R18	-0.6%
265/40R18	1.2%
P245/45R18	2.4%
265/35R18	-2.7%
P245/40R18	-1.2%
215/50R18	1.8%
255/40R18	0%
235/40R18	-2.4%
275/40R18	2.4%
245/45R18	2.4%
P215/45R18	-1.5%
235/45R18	1.2%
P215/50R18	1.8%
245/40R18	-1.2%
225/45R18	-0.3%
P225/45R18	-0.3%
275/35R18	-1.8%
265/35R19	1.2%
295/30R19	0%
285/30R19	-0.9%
255/35R19	0%
315/30R19	1.8%
325/30R19	2.7%
245/40R19	2.7%
245/35R19	-0.9%
P325/30R19	2.7%
275/30R19	-1.8%
265/30R19	-2.7%
195/50R19	2.7%
225/40R19	0.3%
P245/35R19	-0.9%
P245/40R19	2.7%
235/35R19	-2.1%
235/40R19	1.5%
305/30R19	0.9%
P285/30R19	-0.9%
275/35R19	2.1%
265/30R20	1.1%
245/30R20	-0.8%
245/35R20	2.9%
P285/30R20	2.9%
255/30R20	0.2%
345/25R20	2.9%
225/35R20	0.8%
275/30R20	2%
235/35R20	1.7%
285/30R20	2.9%
P335/25R20	2.3%

What vehicles can use T185/55R18 spare tire?

There are 674 vehicle models that can potentially use T185/55R18 as a spare tire. It is important to note that spare tire should match the specifications of the vehicle it is used on. T185/55R18 spare should ideally have the same or higher load index to ensure adequate load capacity to be able to carry your vehicle's weight. It is best to consult your vehicle's owner manual or contact the manufacturer to determine if T185/55R18 spare tire is appropriate for your vehicle.

All listed guides, data and/or calculations are for informational purposes only. Spare-Tires.com does not warrant or make any representations regarding the accuracy of or the results of the use of this information.