Decoded sidewall size

235/65R18 tire size

Name: NHTSA Tire Complaints & Recalls by Tire Size (complaints through 2021) - 235/65R18
Creator: TreadSize
License: https://creativecommons.org/licenses/by/4.0/

235/65R18 in inches: 30.03" overall diameter — 9.25" wide, 6.01" sidewall.

Methodology: dimensions are calculated from standard ETRTO tire-size formulas. Last reviewed June 2026 by the TreadSize editorial team.

235/65R18 tire detail photo with TreadSize diameter, width, and rim measurement card

Overall diameter 30.03 in 762.7 mm

Section width 9.25 in 235 mm

Sidewall height 6.01 in 152.75 mm

Revs / mile 672 speedo calibration

Before you fit 235/65R18: verify the vehicle placard, load index, speed rating, wheel offset, and full-lock/full-compression clearance. Nominal dimensions do not guarantee a safe physical fit.

Compare this size

Full dimensions

Measurement	Metric	Imperial
Overall diameter	762.7 mm	30.03 in
Section width	235 mm	9.25 in
Sidewall height	152.75 mm	6.01 in
Rim diameter	457.2 mm	18 in
Circumference	2396.1 mm	94.33 in
Revolutions per mile	671.6
Aspect ratio	65%

NHTSA safety record for 235/65R18

Drawn from official U.S. government (NHTSA) consumer complaint and recall filings for this exact tire size — not the generic averages you'll find elsewhere.

Complaints on record 10 filed with NHTSA

Recalls on record 4 see below

4 tire recalls on record affecting 235/65R18

NHTSA 22T017000 · 2022 FALKEN PRO G5 CSV Inadequate curing may lead to tread separating from the tire, causing vehicle instability, and increasing the risk of a crash.
NHTSA 20T018000 · 2020 GENERAL TIRE RELIATREK HT Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss
NHTSA 19T005000 · 2019 BIG O BIG FOOT A/S The distortion may cause parting of the lower sidewall compounds extending to the cord material, increasing the risk of tire failure and a crash.
NHTSA 18T001000 · 2018 VOGUE SIGNATURE V Missing TIN information can make it difficult for owner to identify the tire in the event of a recall, potentially increasing the risk of driving with a recalled tire which could r

Look up these campaign numbers at NHTSA.gov →

What owners report fails — 235/65R18

Cracking 3
Blister 2
Out of round 1

These are unverified consumer reports and manufacturer recalls filed with the National Highway Traffic Safety Administration — not validated failure rates, and not adjusted for how many tires of this size are in service. Popular sizes naturally accumulate more reports. Use this as a research signal, not a verdict on any specific tire. Data as of 2021. Source: NHTSA Office of Defects Investigation (public domain). Always check the latest recalls at NHTSA.gov and report a tire problem if you have one.

Recall timeline for 235/65R18

NHTSA campaigns affecting this tire size, grouped from the local recall dataset. Exact owner-notification dates are not stored here; open the campaign at NHTSA for current remedy details.

Open size recall page

22T017000 - 2022 FALKEN PRO G5 CSV Inadequate curing may lead to tread separating from the tire, causing vehicle instability, and increasing the risk of a crash. 20T018000 - 2020 GENERAL TIRE RELIATREK HT Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss 19T005000 - 2019 BIG O BIG FOOT A/S The distortion may cause parting of the lower sidewall compounds extending to the cord material, increasing the risk of tire failure and a crash. 18T001000 - 2018 VOGUE SIGNATURE V Missing TIN information can make it difficult for owner to identify the tire in the event of a recall, potentially increasing the risk of driving with a recalled tire which could r

How 235/65R18 compares inside the NHTSA size dataset

Complaint rank #136 of 271 among 271 safety-record sizes

Vs dataset median At median median 10 complaints

Top failure share 30% Cracking

This comparison is derived only from tire sizes that have a real NHTSA complaint or recall record in the TreadSize dataset. Source: NHTSA ODI — Consumer Complaints (FLAT_CMPL) + Recalls (FLAT_RCL), U.S. DOT public domain; Complaints through 2021.

Nearby safety records by complaint volume

185/55R16 10 complaints · 0 recalls 185/60R14 10 complaints · 0 recalls 215/55R18 10 complaints · 0 recalls 275/45R20 10 complaints · 0 recalls 285/60R20 10 complaints · 0 recalls 255/35R19 11 complaints · 2 recalls 225/55R18 11 complaints · 1 recalls 255/60R19 9 complaints · 1 recalls

Dataset download: JSON or CSV. Latest recall lookup: NHTSA.gov.

Related tire sizes

245/65R18 → 255/65R18 → 235/60R18 → 235/55R18 → 235/65R17 →

Decode another tire size → · Compare two sizes → · Plus sizing →

Frequently asked questions

What is the overall diameter of a 235/65R18 tire?

A 235/65R18 tire has an overall diameter of 30.03 inches (762.7 mm).

How tall is a 235/65R18 tire?

The sidewall height is 152.75 mm (6.01 inches), and the overall diameter from the ground to the top of the tire is 30.03 inches.

How many revolutions per mile does a 235/65R18 tire make?

A 235/65R18 tire makes approximately 672 revolutions per mile. Your speedometer is calibrated to this number.

What rim size does a 235/65R18 tire fit?

A 235/65R18 tire is designed for a 18-inch rim (457.2 mm).

Are there recalls or safety complaints for 235/65R18 tires?

NHTSA has 10 consumer complaints on record for the 235/65R18 size and 4 recalls; the most reported issue is cracking (3 reports). These are unverified consumer reports, not validated failure rates, and are not adjusted for how many tires of this size are in service.

All dimensions calculated using standard ETRTO formulas. Always confirm fitment with your vehicle's door-placard and a qualified tire professional before purchasing.