2018 Acura NSX Owners Manual - Tire Information

• Properly inflated tires provide the best combination of handling, tread life, and comfort. Refer to the driver's doorjamb label or the specifications (see "Specifications") for the specified pressure.
• Underinflated tires wear unevenly, adversely affect handling and fuel economy, and are more likely to fail from overheating.
• Overinflated tires make your vehicle ride harshly, are more prone to road hazards, and wear unevenly.
• Every day before you drive, look at each of the tires. If one looks lower than the others, check the pressure with a tire gauge.
• Measure the air pressure when tires are cold. This means the vehicle has been parked for at least 3 hours, or driven less than 1 mile (1.6 km). If necessary, add or release air until the specified pressure is reached. If checked when hot, tire pressure can be as much as 4-6 psi (30-40 kPa, 0.3-0.5 kgf/cm2) higher than checked when cold.
• At least once a month or before long trips, use a gauge to measure the pressure in all tires, including the spare. Even tires in good condition can lose 1-2 psi (10-20 kPa, 0.1-0.2 kgf/cm2) per month.

Every time you inflate the tires, check for the following:

• Any damage to tires, including bumps, bulges, cuts, splits, or cracks in the side or tread. Remove any foreign objects and inspect for air leaks. Replace tires if you see fabric or cord.
• Uneven or excessive tread wear. Have an authorized Acura NSX dealer check the wheel alignment.
• Cracks or other damage around the valve stems.

The groove where the wear indicator is located is 1/16 inch (1.6 mm) shallower than elsewhere on the tire. If the tread has worn so low that the indicator is exposed, replace the tire. Worn out tires have poor traction on wet roads.

The label attached to the driver's doorjamb provides necessary tire and loading information.

Replace your tires with radials of the same size, load range, speed rating, and maximum cold tire pressure rating (as shown on the tire's sidewall). Using tires of a different size or construction can cause certain vehicle systems such as the ABS and Vehicle Stability Assist^® (VSA^®) system to work incorrectly.

It is best to replace all four tires at the same time.

If you change or replace a wheel, make sure that the wheel's specifications match those of the original wheels. Only use TPMS-specified wheels approved for your vehicle.

The life of your tires is dependent on many factors, including driving habits, road conditions, vehicle loading, inflation pressure, maintenance history, speed, and environmental conditions (even when the tires are not in use).

In addition to regular inspections and inflation pressure maintenance, it is recommended that you have annual inspections performed once the tires reach five years old. All tires, including the spare, should be removed from service after 10 years from the date of manufacture, regardless of their condition or state of wear.

If driving on snowy or frozen roads, mount all season tires marked "M+S", snow tires, or tire chains; reduce speed; and maintain sufficient distance between vehicles when driving. For winter tires, select the size and load ranges that are the same as the original tires, and mount them to all four wheels.

Tire chains can be used only in conjunction with winter tires. Install tire chains on the rear tires only.

For 295/30R20 (97V) winter tires: Auto-trac 232405

For 305/30R20 (103W) XL winter tires: K-Summit K-44

Mount chains as tightly as you can, and make sure that they do not touch the brake lines or suspension.