# Quick Answer: Tires Specifications How To Read?

## What do the 3 numbers mean on tire size?

B: TIRE WIDTH The three -digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. It’s the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width. In other words, it’s sidewall height divided by tire width.

## How do you read tire date codes?

The last four digits of this code tell you when your tire was manufactured. The first two numbers indicate what week of the year it was made (out of 52 weeks per year), and the second two numbers represent the year. For example, 5200 would reveal that a tire was manufactured during the 52nd week of the year 2000.

## What do wheel numbers mean?

The wheel size is the size designation of a wheel given by its diameter, width, and offset. For example, 17 x 8.5 x +35 designates a diameter of 17 inches, width of 8.5 inches, and +35 mm positive offset (432 × 216 x +35 in fully metric numbers ).

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## Can I use 235 tires instead of 225?

Yesthat size will work 100% perfectly, as it is the exact same diameter as the 225 /75-16. 235 /70-16 is actually a shorter tire.

## How tall is a 17 inch tire?

17 INCH TIRES TIRE HEIGHT
225 35 17 23.20
245 35 17 23.75
315 35 17 25.68
335 35 17 26.23

## How old of a tire is safe?

While there’s no federally sanctioned safety guidance on when a tire is too old to be safe, many carmakers recommend replacement at six years from the date of manufacture. Old tires have been the culprit in fatal accidents.

## How many years do tires last on average?

It may be tentative, but tires do have an expiration date. There is a general consensus that most tires should be inspected, if not replaced, at about six years and should be absolutely be swapped out after 10 years, regardless of how much tread they have left. How do you know how old your tires are?

## What does dot mean on a tire?

The three letters, “DOT,” indicate that the tire has passed all of the tests required by the Department of Transportation (DOT) for motor vehicle safety standards.

## How do you read a wheel offset?

Measurement of wheel offset can be positive or negative and is described in millimeters. An offset of 0 describes a wheel mounting pad positioned in the center of the wheel. A negative offset indicates the mounting pad is is positioned on the hub side of the centerline, closer to the vehicle.

## How do I choose tire size?

Reading tire size documentation

1. 1) The width of the tires in millimeters.
2. 2) Percentage height of the sidewall in relation to the width.
3. 3) Radial construction.
4. 4) Rim diameter in inches.
5. 5) Load index (the maximum load capacity of the tire )
6. 6) Speed index (the maximum speed of the tire )
7. 7) Self-Supporting Run-flat tire.
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## Are wider tires better?

From a safety point of view, both types have their good sides: On a dry road, wider tires will offer more grip than narrow ones, but the risk of aquaplaning will be higher with wide tires. – In the winter, narrow tires are better under extreme conditions as they provide higher surface pressure against the road.

## How much wider is a 235 than a 225 tire?

Plus Sizes

225 /75-15 235 /75-15
Diameter inches (mm) 28.29 (718.5) 28.88 (733.5)
Width inches (mm) 8.86 ( 225 ) 9.25 ( 235 )
Circum. inches (mm) 88.87 (2257.23) 90.72 (2304.36)
Sidewall Height inches (mm) 6.64 (168.75) 6.94 (176.25)

## Can I put 245 tires on 225 rims?

Can you put 245 tires on 225 rims? Yes, you could. As long as both of tires have the same diameter, you can use them. In this case the diameter is 18 for both.

## What is the difference in a 225 and 235 tire?

If considering gas mileage, you’ll want a tire with less rolling resistance. The 225, being thinner, has less rolling resistance than the 235.