FMVSS 110 Tire Selection and Rims for Motor Vehicles with a GVWR of 4.536 Kg (10.000 Lbs) or Less

"FMVSS 110 Tire Selection and Rims for Motor Vehicles with a GVWR of 4.536 kg (10.000 lbs) or Less," published under the Federal Motor Vehicle Safety Standard (FMVSS) established by the National Highway Traffic Safety Administration (NHTSA), describes requirements for tire selection and recreational vehicle trailer load-carrying capacity information to prevent tire overloading on motor vehicles. This standard applies to motor vehicles, excluding motorcycles, with a GVWR of 4.536 kg (10,000 lbs) or less, and their non-pneumatic spare tire assemblies.

The gross vehicle weight rating (GVWR) is the maximum loaded weight of a vehicle or trailer, as determined by the manufacturer. The GVWR includes not only the weight of passengers and cargo but also the vehicle itself. The gross vehicle weight rating is all about safety.

Subject to the exceptions specified in this standard, vehicles must be equipped with tyres that meet the requirements of standard 571.109 “New pneumatic tyres, bias-ply tyres and T-type spare tyres for vehicles manufactured between 1949 and 1975”.

Passenger cars may be equipped with pneumatic T-type temporary spare tire assemblies that meet the requirements of standard 571.109 or non-pneumatic spare tire assemblies that meet the requirements of standard 571.129 and FMVSS 110. Passenger cars equipped with non-pneumatic spare tire assemblies must also meet the requirements of this standard.

Trailers may be equipped with SI tires, FI tires, or tires with rim diameter code 12 or less that meet the requirements of standard 571.119.

The following requirements for tire load limits for passenger cars are established:

• The vehicle's maximum load on the tire must not exceed the valid maximum load value marked on the tire's sidewall.
• The normal load of the vehicle on the tire should not exceed 94 percent of the load value at the cold inflation pressure recommended by the vehicle manufacturer for that tire.

The FMVSS 110 standard plays a crucial role in ensuring the safety and reliability of passenger vehicles. By regulating tire and wheel selection for motor vehicles, it aims to minimize the risk of tire failure and improve overall vehicle safety.

This standard specifies the following general requirements:

• Choosing tires and rims for new vehicles
• Correct labeling of tire information
• Load carrying capacity
• Plate information (tire and loading information label)

This standard primarily applies to passenger cars, multi-purpose passenger vehicles, trucks, and buses with a gross vehicle weight rating (GVWR) of 4.536 kilograms or less. Motorcycles and trailers are excluded from the scope of this standard.

The key requirements of the FMVSS 110 standard are:

• Tyre and rim match: Manufacturers must ensure that tyres and rims fitted to a vehicle:
  • Must be properly matched in size and performance
  • Must be suitable for the vehicle's intended load and usage conditions
• Tire information label (plate): Vehicles must have a tire information label, usually located on the driver's door jamb, door pillar, or glove compartment. This label must include:
  • Recommended cold tyre inflation pressure for front, rear and spare tyres
  • Tire size definitions
  • Number of passengers the vehicle can carry safely
  • Vehicle gross axle weight values ​​(GAWR) and gross vehicle weight value (GVWR)

This allows users to maintain correct inflation pressure and avoid overloading, which is critical for safe use.

• Load limits: FMVSS 110 requires that the combination of tire size, inflation pressure, and rim selection provide adequate load capacity. This helps prevent overloading the tires, which could lead to a blowout or loss of control.

The FMVSS 110 standard is important because it directly protects drivers, passengers, and vehicles from the serious risks posed by tire-related failures. This standard is important for the following reasons:

• Prevents tire overloading: This standard ensures that every vehicle is equipped with tires and wheels that can safely carry the maximum load it can carry. Without this regulation, incompatible or substandard tires could be installed, leading to tire blowouts, reduced grip, and serious accidents.
• Reduces the risk of tire failure: Improper tire pressure is a leading cause of tire failure. The FMVSS 110 standard requires manufacturers to clearly display tire pressure and load information on a label on every vehicle. This helps drivers maintain proper inflation levels, reducing the risk of tire blowouts, poor fuel economy, and premature tire wear.
• Improves vehicle stability and handling: Tires are a critical part of the suspension system. Installing the wrong size or type of tires can negatively impact a vehicle's handling and braking performance. This standard ensures that tires and rims meet the vehicle's design specifications for safe driving.
• It provides essential consumer guidance: The tire and load information label (plate) required by this standard tells drivers what the correct tire pressure should be, what the appropriate tire size is, and what weight the vehicle can safely carry. This allows users to make informed decisions and perform safe maintenance.
• Ensures manufacturer responsibility: This standard requires automakers to rigorously test and verify tire and wheel selections during vehicle design. Compliance with FMVSS 110 must be verified before vehicles can be sold in the US.
• Supports broader traffic safety goals: Tire failures have been linked to major accidents, including rollovers. This standard contributes to national safety efforts by addressing these issues in production before a vehicle hits the road.

Ultimately, the FMVSS 110 standard is a fundamental safety regulation. It protects lives by ensuring every vehicle leaves the factory with safe tires, accurate load and pressure information, and the proper equipment for safe operation under normal driving conditions. By ensuring proper tire selection, inflation, and load capacity, it helps reduce the risk of accidents due to tire failure and makes the roads safer for everyone.

Our organization, which has been supporting businesses across all sectors for years through a wide range of testing, measurement, analysis, and evaluation activities, has a strong team of employees who closely follow global developments in science and technology and are constantly improving themselves. In this context, we also provide testing services to businesses in accordance with the "FMVSS 110 Tire Selection and Rims for Motor Vehicles with a GVWR of 4.536 kg (10.000 lbs) or less."