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Tire size

275/50R20 tire size: dimensions explained

Factory size on the Mercedes-Benz G-Class (G 550 / AMG G 63), Kia EV9. 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 height137.5 mm5.41 in
Overall diameter783 mm30.83 in
Wheel diameter508.0 mm20 in
Circumference2459 mm96.8 in
Revolutions per mile654

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, 50 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 275/50R20 with another size →

275/50R20 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Radar Dimax AS-8
Grand Touring All-Season		XL 113W$160.55View at Tire Rack
Michelin Primacy Tour A/S
Grand Touring All-Season		109H$216.78View at Tire Rack

Highway / touring

TireLoad/speedPrice per tire
Advanta SVT Plus
Crossover/SUV Touring All-Season		109H$173.94View at Tire Rack
Falken ZIEX CT60 A/S
Crossover/SUV Touring All-Season		109H$236.00View at Tire Rack

All-terrain

TireLoad/speedPrice per tire
Bridgestone Dueler A/T Ascent
On-Road All-Terrain		XL 113H$311.99View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Pirelli Scorpion Verde
Street/Sport Truck Summer Truck		109W$169.91View at Tire Rack
Bridgestone Alenza 001 RFT
Street/Sport Truck Summer Truck		XL 113W$181.12View at Tire Rack

Winter

TireLoad/speedPrice per tire
Vredestein Wintrac Pro+
Performance Winter / Snow		XL 113W$230.03View at Tire Rack
Bridgestone Blizzak IcePeak
Studless Ice & Snow		XL 113T$340.99View at Tire Rack

Showing the lowest-priced in-stock options in each category from 46 275/50R20 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, 10:23 PM PT. Prices change, so confirm on Tire Rack before you buy. Disclosure

Other sizes