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.
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Likewise, What does the R mean in tire size?
If your tire size starts with LT rather than a P than it identifies the tire as a Light Truck tire. … 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.
Also, How do I tell how old a tire is?
To determine the age of your tires, check the last four digits of the U.S. The U.S. Department of Transportation (DOT) number stamped on the tire’s sidewall contains a date code that identifies the age of your tires.
Moreover, How do you read tire information?
The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.
How old of a tire is safe?
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.
Can I use 235 tires instead of 225?
Are 225 and 235 Tires Interchangeable? Yes, they are. However, this is only possible if your car’s rims can accept the larger millimeter.
What does the R or D mean in a tire size?
Question: The difference between the two trailer tire sizes is that the letter D in the first size you listed ST205/75D15 stands for bias ply and the letter R in the tire size that they put on your vehicle stands for radial. …
What does 70 mean on a tire?
If a tire has an aspect ratio of 70, it means the tire’s height is 70% of its width. Lower aspect ratio tires, such as a 60 series, generally offer vehicle handling performance advantages over higher aspect ratio tires, such as a 75 series, but a typical trade off can be ride harshness. Construction.
Are 10 year old tires 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. … An analysis of the used tire revealed that it was nearly 10 years old.
What is the oldest tire you should buy?
A tire shouldn’t be older than 18-months when you purchase it. Most tires are under a year old when the tire shop gets them. That’s important because the rubber starts to breakdown as soon as they roll off the manufacturer’s assembly line.
How often should you replace your tires?
The NHTSA recommends that tires be replaced every six years regardless of the number of miles driven. Proper inflation is the Holy Grail of tire maintenance. Too much or too little air in your tires is guaranteed to cause you trouble and uneven or excessive wear over time.
What size tire is on my car?
Where can I find my tire size? The tire size for your vehicle and wheels can be found in two places: Sidewall of your tire. Inside frame of the driver side door.
What does the first number on a tire mean?
The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle: P225/70R16 91S. Tire width always refers to the measurement from one sidewall to another. … If a tire has an aspect ratio of 70, it means the tire’s height is 70% of its width.
Can I use 10 year old tires?
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. … An analysis of the used tire revealed that it was nearly 10 years old.
Are 10 year old tyres safe?
Tyres that are aged 10 years and older will become a failure item at annual test. If these tyres do not display a date code, they will also fail. As part of the annual test, our Vehicle Standards Assessors (VSAs) will check that each tyre displays a date of manufacture or re-treading.
Do tyres expire?
When in use, it is recommended that tyres are replaced when they reach 7 – 10 years old, (6 years in the case of caravans or trailers). On the sidewall you will find a tyre’s ‘DOT code’. One of the key pieces of information that can be gained from this is the date the tyre was manufactured.
Can I use 235 55r17 instead of 225 65r17?
Yes. For safety reasons be sure that the replacement tires are rated for both load and speed at or above the specifications for your Vehicle. Be sure to replace the tires in pairs on either the front or rear axles. Failure to do so could cause problems.
What happens if you put the wrong size tires on your car?
Choosing too tall of a tire can result in a vehicle prone to rolling over, a dangerous concern for any driver. Tall tires may also rub against the inside of the wheel well. While not immediately problematic, this rubbing can lead to steering issues over time.
Can I change my tire size without changing rims?
It’s possible to change the size of your tires without actually changing the diameter. One example is if you want larger rims – you can buy tires that compensate for the larger rims by reducing the “height” of the outer tire.
Are wider tires better?
Advantages. Larger tires improve handling and cornering, due to wider tread faces and stiffer sidewalls. Wider tires may decrease braking distances on dry pavement. Wider tires may also increase acceleration, especially in very powerful vehicles such as muscle cars.
What does XL mean on a tire?
This means there needs to be different types of tyres, as the tyres used for a large vehicle, an SUV or a fully loaded transporter have to take more weight than those of a normal car. XL tyres have been especially developed for use with heavy loads. Generally speaking, the tyre name XL is used for heavy duty tyres.
Can I use 75 tires instead of 70?
I think the 75 series tire is roughly 1″ taller than the 70 series…. so 1/2″ more sidewall… not a lot of difference. The 75 definately “looks” better and might even get ya better mileage as you’re not turning as fast….
Which is a wider tire 65 or 70?
According to the Generic Auto Tire FAQs in Type2’s Technical Library, the shorter sidewall of the series 65 tire means a slightly wider tire that changes the car’s handling considerably; specifically, “more rubber on the road provides a better grip.” The series 65 provides better turn-in and stability compared to the …
