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Tire size

255/40R22 tire size: dimensions explained

Factory size on the Porsche Macan Electric. 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 width255 mm10.04 in
Sidewall height102 mm4.02 in
Overall diameter762.8 mm30.03 in
Wheel diameter558.8 mm22 in
Circumference2395 mm94.3 in
Revolutions per mile672

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

Reading the marking

255 is the section width in millimetres, 40 is the sidewall height as a percentage of that width, R means radial construction, and 22 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 255/40R22 with another size →

255/40R22 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Michelin Pilot Sport All Season 4
Ultra High Performance All-Season		XL 103V$651.99View at Tire Rack

Highway / touring

TireLoad/speedPrice per tire
Continental CrossContact RX
Crossover/SUV Touring All-Season		XL 103V$408.55View at Tire Rack
Pirelli Scorpion MS
Crossover/SUV Touring All-Season		XL 103V$581.80View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Bridgestone Potenza Sport
Max Performance Summer		XL 103Y$123.23View at Tire Rack
Pirelli P Zero (PZ4)
Max Performance Summer		XL 103Y$195.05View at Tire Rack

Winter

TireLoad/speedPrice per tire
Pirelli Scorpion Winter
Light Truck/SUV Performance Snow Truck		XL 103H$245.46View at Tire Rack
Vredestein Wintrac Pro+
Performance Winter / Snow		XL 103Y$302.04View at Tire Rack

Showing the lowest-priced in-stock options in each category from 18 255/40R22 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