What does treadwear 300 mean on a tire?
To get the treadwear rating, manufacturers test the tire against a control tire rated at 100. A tire rated 300 should wear three times slower than the 100-rated tire. The standard is set so that a rating of 100 is equal to 30,000 miles. The actual rating is a percentage of 30,000 miles. A tire rated at 200 has a projected tread life of 60,000 miles. A tire rated at 50 has a projected tread life of 15,000 miles.Tire tread wear is measured by the treadwear grades of the UTQG. This portrays the tire’s estimated service life. For example, 200 treadwear tires will have about 20,000 miles on them. However, this estimate is not set in stone and it will vary due to external factors.While not even the best UTQG-rating tires can be completely trusted, the tire tread wear ratings guide is actually quite straightforward. To estimate a tread life based on treadwear ratings, you will need to multiply the number by 1000. Therefore, based on simple math, a 400-rated tire should last for 40,000 miles.A good UTQG treadwear rating is generally 300 or above, indicating the tire is expected to be worn three times, as well as the baseline tire set by the National Highway Traffic Safety Administration (NHTSA).
What does 300 mean on a tire?
Treadwear is the easiest to decipher as it is a three-digit number that indicates how long tread on the tire will last relative to other tires. In theory and in similar conditions, a tire with a 300 treadwear rating will last three times as long as one with a 100 rating, and so on. A tire with a 500 treadwear rating is expected to last approximately 50,000 miles under standard conditions. However, factors like driving style, road conditions, and vehicle type can affect actual mileage.Tires with medium treadwear are therefore excellent for everyday driving. Most all-season tires fall in this category, especially between 300 and 500 treadwear.
What is too high for a tire?
You can safely over-inflate tires by up to 10%. For example, if your tires have a recommended PSI of 35, you can go up to around 38 PSI without worry. Anything more than that is too much and not recommended. Running your tires at the correct pressure is important because it keeps you safe, cuts down your gas bill, and makes your tires last longer. Each vehicle has its own specifications for tire pressure, but most fall between 28 and 36 PSI (pounds per square inch).
What is the 7 7 rule for tires?
The 7 7 rule for tires provides a simple temperature guideline for timing your seasonal tire changes. Install winter tires when daily temperatures drop to 7°C (45°F) or below for seven consecutive days. Remove them in spring after seven straight days above 7°C. So, when is the right time to swap? The rule of thumb is 7-for-7: wait until there are seven consistent days at 7 degrees Celsius. The reverse is also true for transitioning to winter. Ottawa’s CAA Members can avoid the tire swap lineups at on-site vendors and save money with our economical new Mobile Tire Change.
What is the 3% tire rule?
If you’re changing tire sizes and wondering, “what is the tire 3% rule? A change greater than 3% in overall tire diameter can affect speed, handling, braking, shifting accuracy, and even frame clearance. The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy.