001784 Bridgestone Turanza ER300 RFT 275/40R18 99Y BSW
Bridgestone Tires

Bridgestone Turanza ER300 RFT 275/40R18 99Y BSW

  • UTQG: 320AA
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The Bridgestone Turanza ER300 RFT tire has a fuel efficient tread pattern and is a touring summer run-flat tire which comes OE on Mercedes Benz and other coupes and sedans. It has an asymmetric tread design and super grippy summer tread compound. It is not designed to be driven in snow, ice or near freezing temperatures, but it is ideal for year-round use in the southern states, or in the northern states and Canada by those that either don't use the vehicle in the winter, or change out for winter tires. This tire is designed for sporty handling and long tread-life, while providing extended mobility for a short time in the event that a puncture causes complete air pressure loss.

This tire has Bridgestone Tire Side Support Run-Flat technology. As such, it has a reinforced sidewall design that supports the weight of the vehicle even with loss of air pressure. The thicker sidewalls are made of heat resistant rubber and provide zero pressure mobility for up to 50 miles, so you can get yourself to a garage or safe location to replace the damaged tire. Remember to always replace runflat original equipment tires on your Mercedes or other runflat equipped car with runflat tires, and ensure your tire pressure monitor system, valve and valve stems are serviced correctly by your tire installer.

Please call Tires-easy customer service if you have any questions about runflat tires, or the Bridgestone Turanza ER300 RFT tire specifically.

Specs: Value: Description:
Sidewall BSW
This describes the sidewall appearance. Examples include Black Sidewall, White Sidewall, and White Letters.
Load Index 99
The load index (LI) is a 2 or 3 digit number that corrolates to the maximum amount of weight the tire can carry. For example, a tire with a load index of 87 indicates that the tire can carry a maximim load of 1,201 lbs. In the case of our example the 87 identifies the tires ability to carry a maximum of 1,201 lbs. So 4 tires will carry a maximum of 4,804 lbs. Refer to your vehicle owner's manual for the recommended minimim Load Index. It is not recommended to install tires with a lower Load Index. By doing so, this could cause your tires to be overloaded thus potentially causing a blowout.
Speed Rating Y
Speed Ratings (SR) are based on laboratory tests and indicates the maximum speed the tire can achieve. These tests are based on limited time trials. Higher speed rating tires typically will yield better handling capabilities, but may often result in lower mileage. Refer to your vehicle owner's manual for the recommended minimum Speed Rating. It is not recommended to install a tire with a lower speed rating as it could affect the handling of your vehicle. It is important to note that speed ratings only apply to tires that have not been damaged, altered, under-inflated or overloaded. Additionally, most tire manufacturers maintain that a tire that has been cut or punctured no longer retains the tire manufacturer's original speed rating, even after being repaired because the tire manufacturer can't control the quality of the repair.
Ply Rating Not Available
Ply Rating is related to the max load capacity. This value can be defined with a letter or number. The higher the number/letter, the higher the load capacity.
UTQG 320AA
To help consumers evaluate their tires, the U.S. National Highway Traffic Safety Administration (NHTSA) created the Uniform Tire Quality Grading System (UTQG). The UTQG rates tires are rated on their tread-wear, traction performance, and temperature resistance. The grade for each of these can be found on the sidewall of your tire (except for winter tires and certain light truck tires). Click here for more information.
Max Single Load(lbs) 1709 The maximum load this tire will support. Remember to multiply this number by the number of tires installed on your vehicle to get the maximum carrying capacity. This number is directly related to the Load Index.
Max Single Air Pressure(PSI) 51 The maximum air pressure this tire will support. This does not represent the amount of air pressure your tires should have at all times. Consult with your owner's manual to determine the best air pressure you should use for your vehicle.
Tread Depth 9.0 The amount of tread on the tire. Once the tire is worn to 2/32nds, it is considered fully used and should be replaced at that time. Most tires will have tire indicators in the grooves of the tire to help you determine when the tires are worn down to 2/32nds.
Rim Width Range Not Available The approved wheel rim width range this tire will support.
Measured Rim Width Not Available The recommended wheel width as recommended by the tire manufacturer to get the best wear us performance for this tire.
Section Width Not Available The measurement from sidewall to sidewall.
Tread Width 9.8 The measurement from one side of the tread to the other side of the tread.
Overall Diameter Not Available The height of the tire when fully inflated.
Manufacturer Part Number 001784 Manufacturer part number (sku)