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Tire size

265/40R20 tire size: dimensions explained

Factory size on the Lucid Air. 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 width265 mm10.43 in
Sidewall height106 mm4.17 in
Overall diameter720 mm28.35 in
Wheel diameter508.0 mm20 in
Circumference2263 mm89.1 in
Revolutions per mile711

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

Reading the marking

265 is the section width in millimetres, 40 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 265/40R20 with another size →

265/40R20 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Kumho Majesty 9 Solus TA91
Grand Touring All-Season		XL 104W$222.11View at Tire Rack
Goodyear Eagle Sport All-Season
Ultra High Performance All-Season		XL 104H$352.99View at Tire Rack

Highway / touring

TireLoad/speedPrice per tire
Continental CrossContact RX
Crossover/SUV Touring All-Season		XL 104V$360.70View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Bridgestone Potenza Sport
Max Performance Summer		XL 104Y$182.54View at Tire Rack
Falken Azenis FK510
Ultra High Performance Summer		XL 104Y$289.00View at Tire Rack

Winter

TireLoad/speedPrice per tire
Michelin X-Ice Snow
Studless Ice & Snow		XL 104H$365.79View at Tire Rack
Michelin Pilot Alpin 5
Performance Winter / Snow		XL 104W$378.19View at Tire Rack

Showing the lowest-priced in-stock options in each category from 21 265/40R20 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