275/35R21 Tire Size Specifications & Compatible Vehicles
Overall Diameter
725.9 mm
Section Width
275 mm
Sidewall Height
96.3 mm
Circumference
2280.5 mm
Revs/Mile
706
Rim Diameter
21"
Inch Equivalent
28.6x10.8R21
Rim Width (ETRTO)
8.5" – 11.0"
Compatible Vehicles
The following vehicles use 275/35R21 tires from the factory:
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 275/35R21 and may be used as replacements:
Understanding 275/35R21
The tire size 275/35R21 means the tire has a section width of 275mm, an aspect ratio of 35% (the sidewall height is 35% of the width), and fits a 21-inch rim.
Sidewall Height = 275 x 0.35 = 96.3 mm
Overall Diameter = (96.3 x 2) + (21 x 25.4) = 725.9 mm
Circumference = 725.9 x π = 2280.5 mm
Overall Diameter = (96.3 x 2) + (21 x 25.4) = 725.9 mm
Circumference = 725.9 x π = 2280.5 mm
Frequently Asked Questions
The 275/35R21 tire size is used on 6 vehicle trims including the 2025 Tesla Model Y, 2024 Tesla Model Y, 2023 Tesla Model Y and 3 more.
A 275/35R21 tire has an overall diameter of 725.9mm (28.6 inches). The sidewall height is 96.3mm, and the total circumference is 2281mm.
For 275/35R21 tires, the ETRTO recommended rim width is 9.5". The acceptable range is 8.5" minimum to 11.0" maximum. Using a rim outside this range can cause improper bead seating and unsafe handling.
Yes, as long as the replacement tire overall diameter is within 3% of the 275/35R21 725.9mm diameter. Compatible alternatives include 175/55R21, 335/25R22, 185/45R22. Use our Tire Size Calculator to compare any two sizes.