275/35R21 tire size
A 275/35R21 tire stands 28.6 inches tall and 10.8 inches wide, with a 3.8-inch sidewall on a 21-inch rim.
- Overall height
- 28.6 in726 mm
- Section width
- 10.8 in275 mm
- Sidewall height
- 3.8 in96 mm
- Rim diameter
- 21 in533 mm
- Circumference
- 89.8 in2280 mm
- Revolutions per mile
- 706439 per km
- Inch size
- 28.6x10.8R21
Compare it with any other size in the tire size calculator.
Sizes you can swap to
These 21-inch sizes are within two width steps and 3% of a 275/35R21's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 265/35R21, 1.0% shorter (0.28 in). Wider sizes also need room in the wheel well and a rim width that suits them.
Plus and minus sizes
Changing rim size means changing the sidewall to keep the same overall height. On 19-inch or 20-inch or 22-inch rims, these are the closest matches to a 275/35R21.
Other 21-inch sizes near 275/35R21
275 mm wide, other sidewalls
35 series, other widths
See the other sizes for this rim on 21-inch tire sizes.
Shop 275/35R21 tires
These open each store's own list of 275/35R21 tires, where you can filter by type, load and speed rating.
275/35R21 questions
How tall is a 275/35R21 tire?
About 28.6 inches (726 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 275/35R21 mean?
275 is the section width in millimetres (10.8 in). 35 means the sidewall is 35% of that width: 96 mm, or 3.8 in. R means radial construction, and 21 is the rim diameter in inches.
Can I use 255/40R21 instead of 275/35R21?
255/40R21 is 1.6% taller (0.45 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 61.0 mph.
What is 275/35R21 in inches?
In inch terms it is 28.6x10.8R21: 28.6 inches tall, 10.8 inches wide, for a 21-inch rim.
How many revolutions per mile does a 275/35R21 make?
About 706 turns per mile, worked out from its unloaded circumference of 89.8 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.