Reference

Metric to Standard Conversion

Enter the metric size (i.e. 285/75 R17)

15-inch Wheel Conversion Chart

Metric to Standard Tire Conversion Chart for 15 inch Wheels
Metric Standard
215/75/15 27.7"x 8.5"
225/70/15 27.4"x 8.9"
225/75/15 28.3"x 8.9"
235/75/15 29.0"x 9.3"
245/75/15 29.5"x 9.6"
255/75/15 30.0"x 10.0"
265/75/15 30.6"x 10.4"

16-inch Wheel Conversion Chart

Metric to Standard Tire Conversion Chart for 16 inch Wheels
Metric Standard
205/85/16 29.7"x 8.1"
215/75/16 28.7"x 8.5"
225/70/16 28.4"x 8.9"
225/75/16 29.2"x 8.9"
235/70/16 29.0"x 9.3"
235/85/16 31.7"x 9.3"
245/70/16 29.5"x 9.6"
245/75/16 30.5"x 9.6"
255/70/16 30.0"x 10.0"
265/70/16 30.6"x 10.4"
265/75/16 31.6"x 10.4"
275/70/16 31.2"x 10.8"
285/75/16 32.8"x 11.2"
295/75/16 33.4"x 11.6"
305/70/16 33.0"x 12.2"
315/75/16 34.8"x 12.4"
375/55/16 32.8"x 15.5"
395/70/16 37.9"x 16.0"

17-inch Wheel Conversion Chart

Metric to Standard Tire Conversion Chart for 17 inch Wheels
Metric Standard
245/70/17 30.6"x 9.8
265/70/17 31.6"x 10.7
285/70/17 33.0"x 11.5
315/70/17 34.4"x 12.4

18-inch Wheel Conversion Chart

Metric to Standard Tire Conversion Chart for 18 inch Wheels
Metric Standard
275/65/18 32.1"x 11.0
375/50/18 33.0"x 15.4
325/60/18 33.2"x 13.3
325/65/18 34.8"x 13.5
305/70/18 35.0"x 12.2
375/60/18 35.7"x 15.5
395/65/18 37.8"x 15.7

20-inch Wheel Conversion Chart

Metric to Standard Tire Conversion Chart for 20 inch Wheels
Metric Standard
325/50/20 33.0"x 13.2"
Metric measurement example: 225/70R15
225 = Section width in millimeters
70 = Aspect ratio (ratio of section height to section width)
R15 = Rim diameter
R = Radial Construction, B = Bias Construction, D = Bias Belted Construction
Calculations for Measurements
Tire Width: Section width divided by 25.4 (Ex: 225 / 25.4 = 8.86")
Section Height: Tire width times aspect ratio (Ex: 8.86" x 70% = 6.20")
Overall Diameter: Section height times 2 plus rim diameter (Ex: (6.20" x 2) + 15 = 27.40")
Tags: 

Top Jeep Articles

Reference
Lumens vs. Watts
  • Matt Konkle
  • July 17, 2018
The watts you thought you knew in the past as a measurement of lighting power have been replaced as more efficient LED lighting products are flooding the marketplace.
Reference
What are Wheel Spacers and Adapters
  • Rick Rotondo
  • July 10, 2018
Wheel spacers and adapters can be a relatively inexpensive way to help accommodate larger and wider tires, or to fit different bolt pattern wheels.
Blog
Sources: Hyundai Motor Group Eying FCA Takeover
  • Matt Konkle
  • June 29, 2018
South Korean automaker possibly looking to acquire FCA to further entrench itself in North American Market.
Blog
Jeep Leads Way, Once Again, As Most Popular American Brand
  • Matt Konkle
  • June 28, 2018
Brand Keys national survey of 296 companies puts Jeep up top for 16th-straight year.
Blog
FCA, Jeep Continue Quality Improvements In Annual JD Power Study
  • Matt Konkle
  • June 21, 2018
Jeep posts brand-best 10% drop in problems according to initial quality study results
IMAGE GALLERY
2018 New Jersey Jeep Invasion - Wildwood, NJ
  • Matt Konkle
  • June 18, 2018

Rows and rows of Jeeps stretching far down the beach. Thousands, really, of all sizes and shapes sitting under the hot June sun in Wildwood, New Jersey.

Blog
Jeep Truck Starts Undressing, Possibly Unveils Price Before 2019 Launch
  • Matt Konkle
  • June 7, 2018
Source claims Jeep's latest venture will have an entry-level price just south of $50k.
Blog
Fiat Chrysler Toying With New Jeep Wave Plan
  • Matt Konkle
  • June 4, 2018
New plans from FCA may have buyers rethink how they purchase Jeep vehicles in the near future.
Blog
Jeep Continues Its 'Best' Streak As FCA Roars To Another Record Month
  • Matt Konkle
  • June 1, 2018
Wrangler sales jump 29 percent in May as JL and JK editions continue to impress buyers.