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Tire size

275/35R21 tire size: dimensions explained

Factory size on the Tesla Model Y Performance, Hyundai IONIQ 5 N. 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 height96.3 mm3.79 in
Overall diameter725.9 mm28.58 in
Wheel diameter533.4 mm21 in
Circumference2281 mm89.8 in
Revolutions per mile706

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, 35 is the sidewall height as a percentage of that width, R means radial construction, and 21 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 275/35R21 with another size →

275/35R21 tires at Tire Rack

All-season

TireLoad/speedPrice per tire
Advanta HPZ-02
Ultra High Performance All-Season		XL 103Y$181.32View at Tire Rack
Kumho Ecsta Sport A/S
Ultra High Performance All-Season		XL 103Y$268.32View at Tire Rack

Highway / touring

TireLoad/speedPrice per tire
Kumho Crugen EV HP71 SUV
Crossover/SUV Touring All-Season		XL 103Y$339.15View at Tire Rack

Summer performance

TireLoad/speedPrice per tire
Pirelli P Zero Run Flat (PZ4)
Max Performance Summer		XL 103Y$240.41View at Tire Rack
Bridgestone Potenza Sport
Max Performance Summer		XL 103Y$316.84View at Tire Rack

Winter

TireLoad/speedPrice per tire
Pirelli Winter Sottozero 3
Performance Winter / Snow		XL 103V$208.02View at Tire Rack
Vredestein Wintrac Pro+
Performance Winter / Snow		XL 103Y$376.66View at Tire Rack

Showing the lowest-priced in-stock options in each category from 33 275/35R21 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