Question 1

What is the diameter of a 275/50 R21 tire?

Accepted Answer

A 275/50 R21 tire has a nominal overall diameter of 808 mm (31.8 inches), a sidewall height of 138 mm and a rolling circumference of 2540 mm. These are nominal figures calculated from the size marking; actual dimensions vary by manufacturer, load and wear.

Question 2

What do the numbers in 275/50 R21 mean?

Accepted Answer

275 is the nominal section width in millimetres. 50 is the sidewall height expressed as a percentage of that width, giving a 138 mm sidewall. R denotes radial construction, and 21 is the wheel bead-seat diameter in inches — which is not the overall tire diameter.

Question 3

Which vehicles use 275/50 R21 tires?

Accepted Answer

The catalogue records this size on 27 vehicle configurations, including 2021 Lexus LX 5.7 Petrol Automatic 8-speed 4WD, 2020 Lexus LX 5.7 Petrol Automatic 8-speed 4WD, 2019 Cadillac Escalade 6.2 Petrol Automatic 10-speed 4WD, 2019 Cadillac Escalade 6.2 Petrol Automatic 10-speed RWD, 2019 Lexus LX 5.7 Petrol Automatic 8-speed 4WD. Always confirm the size against the vehicle placard before fitting.

Nominal section width	275 mm
Sidewall-to-width ratio	50%
Sidewall height	138 mm
Construction	R — radial
Wheel bead-seat diameter	21 inches
Overall diameter	808 mm (31.8 in)
Rolling circumference	2540 mm

275/50 R21 tire dimensions

Enter your tire size

Your results

What 275/50 R21 means

Vehicles with 275/50 R21 tires