295/30R21 Tire Size Specifications & Compatible Vehicles
Overall Diameter
710.4 mm
Section Width
295 mm
Sidewall Height
88.5 mm
Circumference
2231.8 mm
Revs/Mile
721
Rim Diameter
21"
Inch Equivalent
28x11.6R21
Rim Width (ETRTO)
9.0" – 11.5"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 295/30R21 and may be used as replacements:
Understanding 295/30R21
The tire size 295/30R21 means the tire has a section width of 295mm, an aspect ratio of 30% (the sidewall height is 30% of the width), and fits a 21-inch rim.
Sidewall Height = 295 x 0.3 = 88.5 mm
Overall Diameter = (88.5 x 2) + (21 x 25.4) = 710.4 mm
Circumference = 710.4 x π = 2231.8 mm
Overall Diameter = (88.5 x 2) + (21 x 25.4) = 710.4 mm
Circumference = 710.4 x π = 2231.8 mm
Frequently Asked Questions
The 295/30R21 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 295/30R21 tire has an overall diameter of 710.4mm (28.0 inches). The sidewall height is 88.5mm, and the total circumference is 2232mm.
For 295/30R21 tires, the ETRTO recommended rim width is 10.0". The acceptable range is 9.0" minimum to 11.5" 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 295/30R21 710.4mm diameter. Compatible alternatives include 225/45R20, 285/40R19, 175/65R19. Use our Tire Size Calculator to compare any two sizes.