This guide covers the 275/60R20 tire size in inches, close equivalent sizes, how it compares to 275/55R20, and what to check before you buy 275/60R20 tires.
275/60R20 Tire Size in Inches
| Measurement | Metric | Inches |
|---|---|---|
| Overall diameter | 838 mm | 33.0 in |
| Section width | 275 mm | 10.8 in |
| Sidewall height | 165 mm | 6.5 in |
| Wheel diameter | 508 mm | 20.0 in |
| Circumference | 2,632 mm | 103.6 in |
| Revolutions per mile | – | About 612 |
| Approved rim width | 191–241 mm | 7.5–9.5 in |
Specs can shift a little from one brand to another. Always check the maker’s data sheet.
What does 275/60R20 mean?
- 275 is the section width in millimeters.
- 60 is the aspect ratio. The sidewall is 60% as tall as the tire is wide.
- R means radial construction.
- 20 is the wheel diameter in inches.
How the Math Works
Start with the width: 275 mm × 0.60 = 165 mm of sidewall. Divide by 25.4 to get 6.5 inches.
A tire has a sidewall on top and on the bottom. So double it: 6.5 × 2 = 13 inches. Add the 20-inch wheel and you get 33 inches.
Some sources list 611 revolutions per mile and others list 612. Both come from rounding. Divide 63,360 inches (one mile) by the 103.6-inch circumference and you get about 611.6.
More Post: 235/40R19 Tire Size
Best 275/60R20 Equivalent Sizes
| Size | Diameter | Difference | Note |
|---|---|---|---|
| 33×12.50R20 | 33.0 in | 0% | Same height, much wider |
| 305/55R20 | 33.2 in | +0.6% | Wide footprint, check fender room |
| 295/55R20 | 32.8 in | −0.7% | Slightly shorter |
| 285/60R20 | 33.5 in | +1.4% | Common step-up size |
Speedometer and the 3% Rule
Stay within 3% of your stock overall diameter. This keeps the speedometer, odometer, ABS, and shift points close to factory settings.
A taller tire turns fewer times per mile. So the speedometer reads low. With a 285/60R20 (+1.4%), a dash reading of 70 mph means about 71 mph on the road.
If you go past 3%, consider a speedometer recalibration at a dealer or with a tuner.
275/60R20 vs 275/55R20
| Feature | 275/60R20 | 275/55R20 |
|---|---|---|
| Diameter | 33.0 in | 31.9 in |
| Sidewall | 6.5 in | 6.0 in |
| Ride | Softer | Firmer |
| Handling | Good | Sharper |
| Clearance | Higher | Lower |
The 60 series is about 1.1 inches taller. That lifts the axle by roughly half an inch, since the radius changes by half the diameter.
Who Should Pick Which
Pick the 275/60R20 if you want a comfortable ride, more ground clearance, and better impact absorption on rough roads. It also matches the factory size on many trucks.
Pick the 275/55R20 if you drive mostly on paved roads and want quicker steering response. Check your speedometer, since the 60 series reads about 2 mph slower at 60 mph if your truck was set up for the 55.
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Trucks That Use 275/60R20 Tires and How to Buy
Vehicles That Fit
What vehicles use 275/60R20 tires? This is a common factory size on 20-inch wheel packages, depending on trim. It shows up on the Ford F-150, Ram 1500, Chevrolet Silverado 1500, GMC Sierra 1500, and Toyota Tundra. Full-size SUVs like the Ford Expedition, Chevrolet Tahoe, GMC Yukon, and Cadillac Escalade also use it.
Check the tire placard on your driver’s door jamb. It lists the exact size for your truck.
P-Metric vs LT275/60R20
P-metric and Euro-metric tires suit daily driving. LT275/60R20 tires are light truck tires with stronger sidewalls.
Check the load index on the sidewall:
- 115 carries about 2,679 lb per tire.
- 116 carries about 2,756 lb.
- 119 carries about 2,998 lb.
- 123 carries about 3,417 lb.
If you tow or haul heavy loads, choose a Load Range E LT tire. Never go below the load rating on your placard.
Tread Types and Price Range
Pick the tread by how you drive:
- Highway tires give a quiet ride and long tread life.
- All-terrain tires handle gravel, dirt, and light snow.
- Rugged-terrain tires mix quiet manners with an aggressive look.
- Mud-terrain tires suit heavy off-road use but are louder.
Prices for 275/60R20 tires run from about $150 to over $450 per tire. Type, brand, and load range set the price.
Quick Buying Tips
- Look for the 3PMSF (Three-Peak Mountain Snowflake) symbol if you see real snow.
- Check the DOT date code. Fresh tires last longer.
- Replace all four tires on AWD and 4×4 vehicles, or keep the tread depth matched.
- Set the tire pressure to the door placard number, not the number on the sidewall.
- Rotate tires about every 5,000 to 7,500 miles.
More Post: 195/65R15 Tire Size
FAQ’s About 275/60R20 Tire Size
What does the 60 mean in 275/60R20?
The 60 is the aspect ratio. The sidewall height equals 60% of the tire’s width. That is 165 mm, or about 6.5 inches.
Is 275/60R20 the same as a 33-inch tire?
Yes. At 32.99 inches tall, a 275/60R20 counts as a 33-inch tire. It is not a 35-inch tire.
What rim width fits 275/60R20 tires?
The approved range is 7.5 to 9.5 inches. Most factory truck wheels use 8.0 to 9.0 inches, which is the best fit.
Will 275/60R20 affect my speedometer compared to 275/55R20?
Yes. The 60 series is about 3% taller. On a truck set for the 55 series, your speedometer will read about 2 mph low at 60 mph.
Is 275/60R20 a P-metric or LT size?
It comes in both. Match the load index and tire type to your door placard. Choose LT275/60R20 for towing and heavy loads.
Is a 285/60R20 taller than a 275/60R20?
Yes, by about 0.5 inch. A 285/60R20 stands 33.5 inches tall and is about 0.4 inch wider. Many trucks fit it without changes.
I’m Richard Hayes, a content researcher and writer at TireMeasurements.com, specializing in measurements, tire measurements, tire sizing, wheel fitment, and related automotive topics.
