265/60R18 vs 275/65R18Tire Size Comparison

Not Recommended

The 5.1% diameter difference exceeds 5% and could affect ABS and traction control.

265/60R18775mm dia275/65R18815mm dia+19.8mm

Comparison Details

Overall Diameter775.2 vs 814.7 mm (+39.5 mm)
Diameter Difference+5.10%
Section Width265 vs 275 mm (+10 mm)
Sidewall Height159.0 vs 178.8 mm (+19.8 mm)
Circumference2435.4 vs 2559.5 mm
Clearance Change+19.8 mm
Speedometer Error+5.10%
Revs/Mile661 vs 629

Speedometer Correction

When switching from 265/60R18 to 275/65R18, your speedometer will differ from actual speed.

SpeedometerActual SpeedDifference
30 km/h31.5 km/h+1.5 km/h
40 km/h42.0 km/h+2.0 km/h
50 km/h52.5 km/h+2.5 km/h
60 km/h63.1 km/h+3.1 km/h
70 km/h73.6 km/h+3.6 km/h
80 km/h84.1 km/h+4.1 km/h
90 km/h94.6 km/h+4.6 km/h
100 km/h105.1 km/h+5.1 km/h
110 km/h115.6 km/h+5.6 km/h
120 km/h126.1 km/h+6.1 km/h
130 km/h136.6 km/h+6.6 km/h

Vehicles Using These Sizes

Vehicles with 265/60R18

2026 Jeep Grand CherokeeLaredo / Laredo X / Altitude / Limited / Trailhawk (18")2025 Jeep Grand CherokeeLaredo2025 Jeep Grand CherokeeTrailhawk2024 Jeep Grand CherokeeLaredo2023 Jeep Grand CherokeeLaredo2022 Jeep Grand CherokeeLaredo2021 Jeep Grand CherokeeLaredo2020 Jeep Grand CherokeeLaredo2026 Toyota TacomaLimited/TRD Pro2025 Toyota TacomaLimited/TRD Pro2024 Toyota TacomaTRD Off-Road/TRD Pro

Vehicles with 275/65R18

2026 Chevrolet SilveradoWT (Work Truck)2026 Chevrolet SilveradoCustom / Custom Trail Boss2025 Chevrolet SilveradoTrail Boss/ZR22024 Chevrolet SilveradoTrail Boss/ZR22026 Ford F-150XLT / Lariat (18")2025 Ford F-150XLT2024 Ford F-150XLT2023 Ford F-150XLT2022 Ford F-150XLT2021 Ford F-150XLT2020 Ford F-150XLT2026 Ram 1500Tradesman / Express2026 Ram 1500Big Horn / Lone Star2025 Ram 1500Big Horn/Lone Star2024 Ram 1500Big Horn/Lone Star2023 Ram 1500Big Horn/Lone Star2022 Ram 1500Big Horn/Lone Star2021 Ram 1500Big Horn/Lone Star2020 Ram 1500Big Horn/Lone Star2025 Toyota TundraSR/SR52024 Toyota TundraSR/SR52023 Toyota TundraSR/SR52022 Toyota TundraSR/SR52021 Toyota TundraSR/SR52020 Toyota TundraSR/SR5

Individual Tire Size Details

265/60R18
Full specifications, compatible vehicles, and alternatives
275/65R18
Full specifications, compatible vehicles, and alternatives

Practical Guidance

A 5.1% diameter difference is significantly outside the safe replacement range. Switching from 265/60R18 to 275/65R18 can cause dangerous speedometer inaccuracy, ABS/traction control malfunctions, and potential clearance issues. This change is not recommended without professional verification and possible ECU recalibration.

The 3% diameter tolerance is a widely accepted industry guideline referenced by the ETRTO and most vehicle manufacturers. When in doubt, consult your vehicle's owner's manual or a qualified tire professional. For U.S. tire safety standards and recalls, see the NHTSA Tire Safety page.

Frequently Asked Questions

Not Recommended. The overall diameter differs by 5.10%, width changes by 10mm.

Speedometer error will be 5.10%. At an indicated 100 km/h, actual speed is about 105.1 km/h.

Ground clearance changes by +19.8mm per side.