RightTread

Tire size

275/30R20 tire size: dimensions explained

Factory size on the Tesla Model 3 Performance, Chevrolet Corvette (C8). Below are the dimensions calculated from the size marking itself. Your vehicle's correct size, load index and speed rating are on the placard in the driver's door jamb; check it before buying.

MeasurementMetricImperial
Section width275 mm10.83 in
Sidewall height82.5 mm3.25 in
Overall diameter673 mm26.5 in
Wheel diameter508.0 mm20 in
Circumference2113 mm83.2 in
Revolutions per mile761

Calculated values: diameter = wheel + 2 × (width × aspect ratio). Real tires vary slightly by brand and model.

Reading the marking

275 is the section width in millimetres, 30 is the sidewall height as a percentage of that width, R means radial construction, and 20 is the wheel diameter in inches. A passenger (P or Euro-metric) tire and an LT tire in the same size are not interchangeable without checking load requirements.

Compare 275/30R20 with another size →

275/30R20 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Advanta HPZ-02
Ultra High Performance All-Season		XL 97W$143.33View at Tire Rack
Yokohama ADVAN Sport A/S+
Ultra High Performance All-Season		XL 97Y$247.99View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Nexen N FERA SU1
Ultra High Performance Summer		XL 97Y$111.08View at Tire Rack
Hankook Ventus V12 evo2
Max Performance Summer		XL 97Y$262.91View at Tire Rack

Winter

TireLoad/speedPrice per tire
Vredestein Wintrac Pro+
Performance Winter / Snow		XL 97Y$257.28View at Tire Rack
Nokian Hakkapeliitta R5 EV
Studless Ice & Snow		XL 97T$371.95View at Tire Rack

Showing the lowest-priced in-stock options in each category from 31 275/30R20 tires in Tire Rack's feed, sorted by price only. We don't rank by commission. Match or exceed the load index and speed rating on your placard.

Affiliate links: if you buy through a Tire Rack link, RightTread may earn a commission through CJ. It doesn't change your price. Prices are Tire Rack's per-tire prices from Tire Rack's product feed as of Nov 7, 2026, 9:19 PM PT. Prices change, so confirm on Tire Rack before you buy. Disclosure

Other sizes