285/55R20 tires are a plus sized version of 255/70R18 tires, and typically found on a Toyota Tundra. If you drive a 2012-2021 model year Tundra, then 285/55R20 tires are your plus sized option. Plus sized tires are commonly used to add ground clearance to a truck for off-road driving.
Are 285 tires equal to 33?
A lot of people do not know “are 33-inch tires the same as 285”. They assume that two of these metrics are different. The answer is “yes, it is”. 285 tires refer to the width in millimeters while 33-inch tires allude to diameter.
What does 285 mean on a tire?
285 – Section Width in millimeters. 70 – Aspect Ratio. R – Designates the tire has radial construction. 17 – Wheel Diameter.
What does 275 55R20 mean?
The same 2014 Ford F150 in their Platinum Series comes with a tire size of P275/55R20. The tire is a (P) passenger tire, with a tread width of 275 millimeters, the sidewall is 55% as tall as the tread (section width) is wide, and the wheel diameter is 20 inches.
What is 285 55R20? – Related Questions
Why are tires called 33?
In our example size, the tire will fit a 18-inch wheel. Some manufacturers build off-road tires using inches instead of millimeters, so you may see sizes like “33×17.” This simply means the total height of the tire is 33 inches and it fits a 17-inch wheel.
What is meant by 33 inch tires?
33 is the tire height, or diameter (inches) 12.50 is the section width (inches) R represents the carcass construction (radial) 17 is the wheel diameter (inches)
What does 275 mean on a tire?
The numbers in the tire size refer to its width, aspect ratio, and wheel diameter. “275/35R19” means the tire is 275 mm wide, has an aspect ratio (that is, the width divided by the height) of 35%, and fits on a 19″ wheel.
What size tire is a 275 equivalent to?
P-Metric Tire Sizes – P-Metric to Inches Conversion Chart
| Rim Size |
P-Metric Size |
Actual Tire Height |
| 18 Inch |
265/60R18 |
30.5 inches |
| 275/65R18 |
32.1 inches |
| 275/70R18 |
33.2 inches |
| 285/75R18 |
34.8 inches |
What does 55 R mean on a tire?
The following “55” is the tire wall height as a percentage of the width. So in our example, the actual height in millimeters would be just under 130 mm. Then comes the letter “R” as the identifier for radial tires.
What does r20 mean on a tire?
Wheel Diameter
Look for the number that follows the letter R in the sequence. For the tire size “P245/50R20 102V,” the wheel diameter is 20. This means that the tires need to fit 20-inch wheels.
What tire is better R or D?
A radial tire flexes more than a bias tire, giving it better ground contact, traction, stability, and tread wear. A radial tire will normally run cooler than a bias ply tire, especially when the tire is under a load. A tire that runs cooler will last longer. For those reasons I would recommend an R tire over a D tire.
What does R and D stand for on tires?
R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. 17 The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches.
What does R and R mean tires?
That R you see after the 70 means that this tire has a radial construction. Other letters you might see there would be B (belted) and D for bias-ply tires. The 17 tells you the width of the wheel on which the tire should be mounted.
What speed are R rated tires good for?
Speed rating R allows for speeds up to 106 mph (170 km/h) under optimal conditions. Like Q, R tires generally prioritize a particular function or unique performance over maximum speed capability.
How fast can you go on R tires?
How fast can an R rated tire go?
Buying a Tire With the Right Speed Rating and Load Index
But if you want to buy an “R,” it’s better to not. That can sound a little strange. After all, R is 106mph, and you probably never go anywhere near that speed.
What happens if you go faster than tire rating?
Safety advocates and tire experts say that habitually driving faster than a tire’s rated speed can generate excessive heat that damages the rubber, with potentially catastrophic results.
Do H or V rated tires last longer?
Sticking with H-rated tires comes at a cost. While we found prices are similar to S- and T-rated tires, H-rated tires didn’t last as long in our treadwear test–an average of 49,180 miles, versus 61,080 for our S- and T-rated tires. V-rated tires had an even shorter tread life of 48,260 miles.
Which is better T or H speed rating?
H-Rated Tires: This is a perfect, average tire for most sedans and commuter vehicles. It might not seem to fit in our chart, but the tire speed rating “H” is rated for up to 130 mph. T-Rated Tires: This tire is often recommended for family sedans and vans. It’s rated for up to 118 mph.
Can you go down in speed rating on tires?
You can always go up in performance rating, but you can never downgrade or you’ll compromise the handling and safety of your vehicle. Note: One tire size could come in multiple speed ratings.