A 97W tire can carry 730 kg at full rated pressure and is tested for speeds up to 168 mph under set standards.
If your tire sidewall ends with 97W, you are looking at the service description. That short code tells you two things: how much weight one tire can carry, and the top speed class the tire was built to handle under controlled testing. It is one of the last details many drivers read, yet it can change whether a replacement tire is a clean match for the car.
Here’s the plain reading. The number 97 is the load index. The letter W is the speed symbol. Put together, they tell you that each tire is rated to carry about 730 kg, or about 1,609 pounds, and that the tire falls into the 168 mph speed class when it is in proper condition and inflated as required. That speed mark is not a target. It is a tested capability marker.
97W On A Tire Sidewall And Why It Matters
Sidewall codes are not decoration. They tell shops, vehicle makers, and drivers whether a tire matches the job the car asks it to do. If the service description is too low, a tire may run hotter under load, wear in a rougher pattern, or give up some margin at highway speed. If it is right, the car is much more likely to feel as it should on the road.
What The 97 Means
The load index is a coded weight limit for one tire. With a rating of 97, that tire can carry 730 kg, which is about 1,609 pounds, when it is inflated to the pressure tied to that rating.
- It is a per-tire rating, not a whole-car rating.
- Four tires rated 97 can carry far more than many cars are allowed to weigh, so the vehicle placard still rules.
- The rating works only with proper inflation and a sound tire.
- A higher number means more carrying ability, but it does not raise your car’s payload limit.
What The W Means
The W speed symbol marks the tire for speeds up to 168 mph, or 270 km/h, in set test conditions. That is not a green light to drive that fast. Road laws, vehicle limits, tire age, tread depth, pressure, temperature, and load still shape what is safe on public roads.
It also does not mean every W-rated tire feels the same. One 97W touring tire and one 97W summer tire may share the same code yet drive in a totally different way. The code tells you the class. It does not tell you the whole story of ride, grip, noise, or wet braking.
What Does 97W Mean On A Tire In Daily Driving?
In daily use, 97W is a quick check that your tire’s carrying ability and speed class are in the range your vehicle may need. Say your sidewall reads 225/50R17 97W. The size part tells you width, aspect ratio, construction, and rim diameter. The 97W at the end tells you the service description. When shops search for replacements, they should match that last part too, not only the size.
This matters most when the car is loaded with passengers, luggage, or long highway miles. A tire that fits the rim but falls short on service description is not the same tire in real use. That is why the driver’s door placard and owner’s manual matter so much. They tie the tire to the car, not just to the wheel.
- Size tells you whether the tire fits.
- Load index tells you what one tire can carry.
- Speed symbol tells you the tire’s speed class.
- Extra markings like XL or run-flat add more context.
| Load Index | Max Load Per Tire (lb) | Max Load Per Tire (kg) |
|---|---|---|
| 91 | 1,356 | 615 |
| 92 | 1,389 | 630 |
| 93 | 1,433 | 650 |
| 94 | 1,477 | 670 |
| 95 | 1,521 | 690 |
| 96 | 1,565 | 710 |
| 97 | 1,609 | 730 |
| 98 | 1,653 | 750 |
| 99 | 1,709 | 775 |
| 100 | 1,764 | 800 |
The table shows why a small jump in sidewall code can matter. A 97-rated tire carries more than a 94-rated one, even if the rest of the size looks the same. If you want a public chart for cross-checking, Goodyear’s load index chart lays out how the code maps to weight.
Why The Full Service Description Deserves A Second Look
Many buyers shop by tire size alone. That is where mistakes start. Two tires can both be 225/50R17, yet one may end in 94V and the other in 97W. Both may mount on the same wheel. Both may even show up in the same search results. They are still not a straight swap.
A lower load index trims carrying margin. A lower speed symbol can lower the tire’s speed class and heat tolerance. A higher rating is often fine, but it does not raise the weight your car is allowed to carry. Your vehicle maker sets that limit, not the tire seller.
Where Drivers Get Tripped Up
- They match width and rim size, then stop reading.
- They miss the service description at the end of the size line.
- They buy a lower-rated tire because it is cheaper.
- They assume a W rating means the tire is built for every style of driving.
- They skip the placard on the door jamb.
For a clean overview of how load and speed marks work together, Michelin’s load and speed rating explainer is a solid manufacturer reference. It also makes the point that fitting a higher load or speed rating does not raise the vehicle’s own load limit.
| Speed Symbol | Max Speed | Typical Fitment Style |
|---|---|---|
| H | 130 mph | Sedans and coupes |
| V | 149 mph | Sport sedans and coupes |
| W | 168 mph | Performance street cars |
| Y | 186 mph | Higher-speed performance cars |
| ZR | 149+ mph | Higher-speed fitments with added marking detail |
Can You Use A Different Rating?
Sometimes, yes. Sometimes, no. A higher load index or speed symbol is often accepted when the size, load range, and fitment still suit the car. Dropping below the original rating is where the red flags start. That is the move most likely to clash with the maker’s spec, tire shop fitment rules, or the way the car was tuned to drive.
Winter tire setups can be a little different on some vehicles, and some fitments add XL, run-flat, or other markings that change the picture. That is why the smart check is still the same: read the placard, read the owner’s manual, then compare the full service description on the tire you plan to buy.
A Fast Way To Check A Replacement Tire
- Read the tire size and service description on the door placard.
- Match the tire size exactly unless your vehicle maker lists another approved size.
- Match or exceed the load index.
- Match or exceed the speed symbol unless your vehicle setup calls for a listed exception.
- Check that all four tires work together for your car’s use.
What 97W Does Not Tell You
97W is useful, but it is not the whole tire résumé. It does not tell you treadwear, wet grip, snow grip, noise, ride softness, or how the tire feels near the limit. It also does not tell you the tire’s age. A brand-new 97W tire and an old 97W tire with cracked rubber are not equals just because the sidewall code matches.
It also does not replace pressure checks. The right code on an underinflated tire does not save you from heat buildup or odd wear. The code tells you the tire’s class. Daily care still decides whether the tire performs like it should.
The Plain Reading Of 97W
When you see 97W on a tire, read it as a pairing of load and speed: 97 means each tire is rated for 730 kg, and W means the tire sits in the 168 mph speed class. That short code helps you judge whether a tire is only the right size, or the right size and the right spec. When you shop for replacements, that last part is what keeps a “close enough” tire from turning into the wrong one.
References & Sources
- Goodyear.“Tire Load Index & Chart”Shows how passenger-tire load index numbers map to per-tire weight capacity, including index 97.
- Michelin.“Tire Load Rating & Speed Rating Explained”Explains how load and speed ratings define a tire’s operating limits and why replacements should match vehicle requirements.