Understanding the '94W' Code on Tires: Load Index and Speed Rating
The code '94W' on tires, often seen as part of a larger tire specification, indicates specific load and speed ratings for the tire. This article will break down what each part of the code means and provide additional context about tire specifications.
1. Load Index 94
The number '94' is the load index of the tire. The load index is a numerical code that corresponds to the maximum weight the tire can support when properly inflated. For a load index of 94, the maximum load capacity is 1477 pounds (670 kg) per tire. You can find the specific weight for each load index number by referring to a load index chart.
2. Speed Rating W
The letter 'W' is the speed rating of the tire. The speed rating indicates the maximum speed at which the tire can carry a load corresponding to its load index under optimal conditions. A speed rating of 'W' means the tire is rated for speeds up to 168 mph (270 km/h).
3. How to Read the Complete Code
When you see a code like '94W', it is interpreted as:
94: The tire can carry up to 670 kg (1477 lbs) per tire. W: The tire is rated for speeds up to 168 mph (270 km/h).To give you a clearer picture, here is an example of a complete tire specification: 205/55R16 94W. This includes:
205: Tire width in mm. 55: Aspect ratio height as a percentage of width. R: Radial construction. 16: Rim diameter in inches. 94: Load index. W: Speed rating.4. Tire Specifications Cheat Sheet
Code Meaning 94 Load Index 670 kg/tire W Speed Rating 168 mph5. Importance of Load Index and Speed Rating
Understanding the load index and speed rating of your tires is crucial for safety and performance. The load index ensures the tire can safely carry the weight of the vehicle and any additional load. The speed rating ensures the tire can safely handle the speeds you might reach while driving.
Always make sure to choose tires that meet or exceed the load index and speed rating specified by your vehicle's manufacturer for optimal safety and performance.