275/35R20 in inches

A 275/35R20 tire is 27.6″ tall and 10.8″ wide, and fits a 20″ wheel. In inches it is written 27.6×10.8R20.

Diameter27.58″

Width10.83″

Sidewall3.79″

Drawn to scale. Nominal dimensions calculated from the size code.

Manufacturer data

How tall 275/35R20 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 23 tires in this size. Their published revolutions per mile work out to 26.7–26.8″ under load (below).

Real 275/35R20 tires measure 27.56–27.80″, against 27.58″ from the size code. They run both taller and shorter than the size code.

Michelin Pilot Sport All-Season 427.80″ +0.22″
General G-MAX AS0727.60″ +0.02″
General G-MAX RS27.60″ +0.02″
Michelin CrossClimate227.60″ +0.02″
Michelin Pilot Sport 4 S · 527.60″ +0.02″
Michelin Pilot Sport Cup 2 Connect · 227.60″ +0.02″
Michelin Pilot Sport Cup 2 R · 327.60″ +0.02″
Michelin Pilot Sport S 527.60″ +0.02″
Michelin Pilot Super Sport27.60″ +0.02″
Toyo Proxes Sport 227.60″ +0.02″
BFGoodrich g-Force COMP-2 A/S PLUS27.56″ −0.02″
BFGoodrich g-Force Phenom T/A27.56″ −0.02″
Toyo Celsius Sport27.56″ −0.02″
Toyo Extensa HP II27.56″ −0.02″
Toyo Observe G3-Ice27.56″ −0.02″
Toyo Proxes Sport A/S27.56″ −0.02″

Each bar runs from the size code's 27.58″ (the orange line) to the model's published height. The track spans 1.0″. Where a model comes in several load ranges, the darker part shows its range of heights; the number after the name is how many versions it comes in.

Height under load26.7–26.8″

Published revs per mile (753–755) mean the tire rolls like a 26.7–26.8″ tire on the vehicle. Use this for speedometer calibration.

Weight spread22.9–32.0 lb

The lightest (Michelin Pilot Sport Cup 2 R, XL) is 9.1 lb lighter per corner than the heaviest (BFGoodrich g-Force COMP-2 A/S PLUS, XL).

23 tires in 275/35R20

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Pilot Sport Cup 2 RPerformance	XL · 102(Y)	27.60	22.9	5.5	1,874	755	Spec page
Michelin Pilot Sport Cup 2 ConnectPerformance	XL · 102(Y)	27.60	25.1	7.2	1,874	755	Spec page
Michelin Pilot Sport Cup 2 RPerformance	XL · 102(Y)	27.60	25.3	5.5	1,874	755	Spec page
General G-MAX RSPerformance	XL · 102Y	27.60	25.4	10.0	1,874	753	Spec page
Michelin Pilot Sport Cup 2 ConnectPerformance	XL · 102(Y)	27.60	25.4	7.2	1,874	755	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 102(Y)	27.60	25.9	9.5	1,874	755	Spec page
Michelin Pilot Sport Cup 2 RPerformance	XL · 102(Y)	27.60	26.6	5.5	1,874	755	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 102(Y)	27.60	27.0	9.0	1,874	755	Spec page
Michelin Pilot Sport S 5Performance	XL · 102(Y)	27.60	27.2	8.5	1,874	755	Spec page
Michelin Pilot Super SportPerformance	XL · 102(Y)	27.60	27.3	9.0	1,874	755	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 102(Y)	27.60	27.6	9.0	1,874	755	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 102(Y)	27.60	27.9	9.0	1,874	755	Spec page
Toyo Proxes Sport 2Performance	XL · 102Y	27.60	28.4	9.2	1,874	754	Spec page
General G-MAX AS07Performance	XL · 102W	27.60	28.8	10.0	1,874	753	Spec page
Michelin Pilot Sport All-Season 4Performance	XL · 102Y	27.80	29.2	10.0	1,874	755	Spec page
Toyo Extensa HP IIPerformance	XL · 102W	27.56	29.3	9.9	1,874	754	Spec page
BFGoodrich g-Force Phenom T/APerformance	XL · 102Y	27.56	29.4	8.0	1,874	755	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 102(Y)	27.60	30.1	9.5	1,874	755	Spec page
Michelin CrossClimate2All-season	XL · 102W	27.60	30.5	10.0	1,874	755	Spec page
Toyo Celsius SportPerformance	XL · 102W	27.56	31.0	10.1	1,874	754	Spec page
Toyo Proxes Sport A/SPerformance	XL · 102Y	27.56	31.2	9.7	1,874	754	Spec page
Toyo Observe G3-IceWinter	XL · 102T	27.56	31.5	11.3	1,874	754	Spec page
BFGoodrich g-Force COMP-2 A/S PLUSPerformance	XL · 102W	27.56	32.0	9.0	1,874	755	Spec page

Is 275/35R20 a 28-inch tire?

≈28″

Close. The size code works out to 27.58″, and the 23 tires here publish 27.56–27.80″, so people call it a 28.

All 28-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 275/35R20	Difference
305/30R20	27.20	-0.37″	-1.4%
265/35R20	27.30	-0.28″	-1.0%
235/40R20	27.40	-0.18″	-0.6%
315/30R20	27.44	-0.14″	-0.5%
215/45R20	27.62	+0.04″	+0.1%
325/30R20	27.68	+0.10″	+0.4%
245/40R20	27.72	+0.14″	+0.5%
285/35R20	27.85	+0.28″	+1.0%
335/30R20	27.91	+0.33″	+1.2%
255/40R20	28.03	+0.45″	+1.6%

How to read 275/35R20

How to read any tire size

How 275/35R20 102Y is printed on the sidewall. It's the most common code among the 23 tires here (12 of them); tires in this size come in other load and speed ratings too.

1275Section width

275 mm across the widest point, or 10.83 inches. Every 275 size

235Aspect ratio

A percentage, not a measurement: the sidewall is 35% as tall as the tire is wide, which is 96.3 mm or 3.79 inches.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 9.0″ to 11.0″.

5102Load index

Each tire carries up to 1,874 lb (850 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

Specification	Inches	Metric
Overall diameter	27.58	701 mm
Section width	10.83	275 mm
Sidewall height	3.79	96.3 mm
Circumference	86.6	2,201 mm
Revolutions per mile (calculated, unloaded)	731.3	454 per km
Revolutions per mile (published by manufacturers)	753–755	468–469 per km
Approved wheel width	9.0–11.0	229–279 mm

Speedometer error after switching to 275/35R20

Your actual speed– mph

Questions about 275/35R20

What is 275/35R20 in inches?

27.58 inches tall, 10.83 inches wide, on a 20-inch wheel. Written in inches, that is roughly 27.6×10.8R20.

How much does a 275/35R20 tire weigh?

Between 22.9 lb and 32.0 lb for the 23 tires listed here. The lightest is the Michelin Pilot Sport Cup 2 R (XL); the heaviest is the BFGoodrich g-Force COMP-2 A/S PLUS (XL).

What wheel width do I need for 275/35R20?

Manufacturers approve 9.0–11.0″ wide wheels for this size.

How many revolutions per mile does a 275/35R20 make?

Published figures run 753–755 revolutions per mile. The calculated figure is 731.3, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/35R20 than 315/30R20?

0.14 inches taller on paper (27.58″ vs 27.44″), which raises the axle about 0.07″. Your speedometer will read about 0.5% slow.