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Rim Width Calculator

Find the rim widths listed for your tire size, or the tire widths listed for your rim, from Continental and Bridgestone data.

By TireCalculatorHub Editorial TeamUpdated: October 6, 2026
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Quick Answer

  • 225/45R17 is listed for rims 7.0 to 8.5 inches wide (178 to 216 mm). A 225/50 is listed for 6.5 to 7.5 and a 225/40 for 7.5 to 9.0.
  • A 7 inch rim is listed for tire widths from 195 to 265 mm in Continental's databook.
  • The range depends on the tire width and the profile, so enter your full size. Other makers can list a different range for the same size.
Permitted Rim Width for a Tire Size

Enter a tire size such as 225/45R17, LT265/70R17 or 295/75R22.5.

Rim width for 225/45R17

Narrowest permitted

7.0"

178 mm

Widest permitted

8.5"

216 mm

Tire section width

8.86"

225 mm

Continental Tyre Databook 2025 lists these as the permitted rims for this profile. Other makers can list a different range for the same size, so check your own tire's data sheet.

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Tire Size to Rim Width Chart

Permitted rim widths in inches for each tire width and profile, from Continental's Tyre Databook 2025. A dash means that width and profile is not in the table. Find your tire width on the left and your profile along the top.

Tire width/30/35/40/45/50/55/60/65/70/75/80
145 mm-------4 to 5---
155 mm------4.5 to 5.54.5 to 5.5---
165 mm------4.5 to 64.5 to 64 to 5.5-4 to 5
175 mm----5 to 65 to 65 to 65 to 5.54.5 to 5.5-4.5 to 5.5
185 mm----5 to 6.55.5 to 65.5 to 65 to 65 to 6--
195 mm--6.5 to 7.56 to 7.55.5 to 75.5 to 75.5 to 6.55.5 to 6.55 to 6.5-5 to 6
205 mm--7 to 86.5 to 7.55.5 to 7.56 to 6.56 to 6.55.5 to 6.55.5 to 6.5-5 to 6.5
215 mm-7 to 8.57 to 8.57 to 86.5 to 76.5 to 76 to 76 to 75.5 to 75.5 to 75.5 to 7
225 mm8 to 87.5 to 97.5 to 97 to 8.56.5 to 7.56.5 to 7.56.5 to 7.56 to 76 to 76 to 7-
235 mm8.5 to 8.58 to 9.58 to 9.57.5 to 97 to 7.57 to 7.56.5 to 7.56.5 to 7.56 to 86 to 8-
245 mm8 to 98 to 9.58 to 9.57.5 to 97 to 8.57 to 8.57 to 8.57 to 8.56.5 to 7.56.5 to 7.5-
255 mm8.5 to 9.58.5 to 108.5 to 108 to 9.57.5 to 8.57.5 to 8.57 to 97 to 97 to 8--
265 mm9 to 109 to 10.59 to 10.58.5 to 107.5 to 9.57.5 to 9.57.5 to 9.57.5 to 9.57 to 8.5--
275 mm9 to 109 to 119 to 118.5 to 10.57.5 to 9.57.5 to 9.57.5 to 9.57.5 to 9.5---
285 mm9.5 to 10.59.5 to 119.5 to 119 to 10.58 to 10-8 to 108 to 10---
295 mm10 to 1110 to 11.510 to 11.59.5 to 11-------
305 mm10.5 to 11.510 to 1210 to 12--------
315 mm10.5 to 11.510.5 to 12.510.5 to 12.510 to 12-------
325 mm11 to 1211 to 1311 to 13--------
335 mm10.5 to 12.5----------

Ranges are the most common listing across rim diameters for each profile. Other makers can list a different range for the same size. Once you have a wheel in mind, the tire stretch and pinch percentage for that rim shows how the tire sits on it.

Tire Width for Each Rim Width

The narrowest and widest tire width listed for each rim width in the same Continental table. Use it to see the maximum tire width for a 7 inch rim, an 8 inch rim and so on.

Rim widthRim width (mm)Narrowest tire listedWidest tire listed
5.0"127145 mm205 mm
5.5"140155 mm215 mm
6.0"152165 mm235 mm
6.5"165185 mm245 mm
7.0"178195 mm265 mm
7.5"191195 mm275 mm
8.0"203205 mm285 mm
8.5"216215 mm285 mm
9.0"229225 mm285 mm
9.5"241235 mm295 mm
10.0"254255 mm315 mm
10.5"267265 mm335 mm
11.0"279275 mm335 mm

Listed means permitted for that rim. It is not a clearance check, so the wheel offset and backspacing of your wheel still decides whether a wider tire fits the car. Convert a tire width with 1 inch = 25.4 mm.

Light Truck Tire Rim Widths

Design rim and approved rim widths in inches for common light truck sizes, from the Bridgestone Truck Tire Data Book 2023 (first model listed for each size, other models can differ).

Tire sizeDesign rimApproved rims
LT225/75R166.0"6.0 to 7.0"
LT245/75R167.0"6.0 to 7.0"
LT265/75R167.5"7.0 to 8.0"
LT215/85R166.0"5.5 to 7.0"
LT235/85R166.5"6.0 to 7.0"
LT245/70R177.0"6.5 to 8.0"
LT265/70R178.0"7.0 to 8.5"
LT235/80R176.5"6.0 to 7.0"

For the load these tires carry at each pressure, see the load range and ply rating chart.

Truck Tire Rim Widths and Dual Spacing

Design rim, approved rim widths and minimum dual spacing in inches for medium truck sizes, from the Bridgestone Truck Tire Data Book 2023. Dual spacing does not apply to wide single sizes, shown as n/a.

Tire sizeDesign rimApproved rimsMin. dual spacing
9R22.56.75"6.00, 6.75, 7.5010.3"
10R22.57.50"6.75, 7.50, 8.2511.4"
11R22.58.25"7.50, 8.2512.5"
12R22.59.00"8.25, 9.0013.5"
11R24.58.25"7.50, 8.2512.5"
12R24.59.00"8.25, 9.0013.5"
215/75R17.56.00"6.00HC, 6.75HC9.3"
245/70R17.57.50"6.75, 7.5010.6"
8R19.56.00"5.25, 6.00, 6.00RW, 6.75, 6.75RW9.1"
225/70R19.56.00"6.00, 6.00RW, 6.75, 6.75RW10.0"
245/70R19.56.75"6.75, 6.75RW, 7.50, 7.50RW11.0"
265/70R19.57.50"6.75, 7.50, 7.50RW, 8.25, 8.25RW11.6"
285/70R19.58.25"7.50, 8.25, 9.0012.5"
305/70R19.5n/a9.00, 8.25, 8.25RW13.5"
445/65R19.513.00"13.00, 14.00n/a
245/75R22.57.50"6.75, 7.5011.0"
255/70R22.58.25"7.50, 8.2511.3"
265/75R22.57.50"7.50, 8.2511.6"
275/70R22.58.25"7.50, 8.25, 9.0012.2"
295/60R22.59.00"9.00, 9.7513.0"
295/75R22.58.25"8.25, 9.0013.2"
295/80R22.58.25"8.25, 9.0013.2"
305/70R22.5n/a8.25, 9.0013.5"
315/80R22.59.00"8.25, 9.00, 9.7513.8"
385/65R22.512.25"11.75, 12.25n/a
425/65R22.512.25"11.75*, 12.25, 13.00, 14.00n/a
445/50R22.514.00"14.00n/a
445/65R22.513.00"12.25*, 13.00, 14.00n/a
455/55R22.514.00"14.00n/a
285/75R24.58.25"8.2512.5"

Bridgestone's notes: RW means a rim with a wide offset and HC a hump or special bead seat type as printed in the data book, and * marks a rim that needs the maker's approval. Use the truck tire size calculator for the diameter and width of each size.

How to Use the Rim Width Calculator

  1. Read the size on the tire sidewall, for example 225/45R17. The first number is the section width in millimetres, the second is the profile and the last is the rim diameter in inches.
  2. In Rim Width for My Tire, type the size. The result shows the narrowest and widest rim listed and the tire section width in inches and millimetres. Light truck and truck sizes show the design rim and approved rims.
  3. To work from a wheel you already own, open Tire Width for My Rim and enter its width in inches (the 7 in a 7J x 17 wheel). The table lists the tire widths and profiles listed for that rim.
  4. Check the result against your tire maker's own data sheet and your vehicle's tire placard before you buy.

Frequently Asked Questions

Passenger sizes use Continental's Tyre Databook 2025 and truck sizes use the Bridgestone Truck Tire Data Book 2023. This tool does not replace the approved rim width published for your exact tire and vehicle.

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