Tire Upgrade

Silver Dodge Viper.Tire upgrading, or plus sizing, is a practice where performance-minded drivers upgrade their original equipment wheels with wider, bigger wheels. Why? It can make the vehicle look sportier. Plus, it offers better handling when done properly. There are two ways to plus-size:

 

    1. Plus 1, 2, Etc.
    2. Plus Zero

Plus 1, 2, Etc.

The most popular form of plus sizing is increasing your vehicle’s wheel diameter and your tire’s rim diameter.  An example is changing from a 14” wheel to a 15” wheel. This is called “plus 1.” (Going from 14” to 16” is plus 2, etc.) To make plus-sizing work, the tire’s aspect ratio decreases while the wheel diameter increases. (Note: The overall diameter of the tire never changes, just the wheel diameter.)

Plus Zero 

If you want to leave your wheel diameter the same, you can still change to a wider tire. (Note: You may need a wider wheel as well.) An example is going from a P195/75R14 tire to P215/65R14 tire. What this means is that your tire width will be wider (195 millimeters to 215), your aspect ratio will be smaller (75 to 65) but the wheel diameter stays the same (14 and 14). Why do this? A wider contact patch on the road can mean better grip and handling.

What Is Staggering? 

A staggered fitment is putting larger wheels on the back of your vehicle than the front of your vehicle. This specification comes from the vehicle’s manufacturer, and is designed to improve performance on vehicles with rear-wheel-drive. A dramatic example of staggering is a drag race car. 

Very Important Plus-Sizing Legal:

Michelin does not recommend up-sizing due to safety reasons. If wheel diameter is increased too much, (from 14” to 17”, for example), or if a staggered fitment is used, then your anti-lock brakes, speedometer and stability system may not work properly. Some manufacturers have already tested and approved multiple wheel diameters, so be sure to ask your authorized Michelin tire dealer on any sizing needs.

Although not available online, we may be able to help you find a tire that fits your selection.

Please tell us the year, make and model of the vehicle for which you would like a tire recommendation. Also please let us know which tire features are important to you. Finally, let us know the area of the country where you do most of your driving. This way, we can provide you with our best recommendation.

Please click the "CONTACT US" button below to allow our Consumer Care team to help you find a tire that matches your selectionorview all tire sizes available.

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Please Note

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  • In order to find your vehicle's options please check the following:
- The vehicle's window sticker, or a decal usually located on the side or rear of the vehicle
- The vehicle owner manual
- Your original sales invoice
  • Your vehicle was manufactured with multiple tire sizes. Please select your size.

    Knowing your tire size can help save time at the tire retailer. It also enables you to make an informed tire purchase.

You can find your vehicle's original equipment tire size in one of the following places:
1. On the tire placard located on the driver's door jamb 
2. In your owners manual
3. On glove compartment door
 4. Inside the fuel hatch or trunk lid

You can also check your existing tire's designation on the sidewall. However, there is no guarantee that these are the original tire size unless they came on the vehicle new.

 Note: Tire Size Image. Show sidewall and tire placard. Example below from UK.
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  • Find the exact tire quickly using your tire size. Check your owner's manual or tire sidewall to find the required specifications.

  • This three-digit number represents the width of the tire in millimeters (mm), measured from sidewall to sidewall. Since this measure is affected by the width of the rim, the measurement is done when the tire is on its intended rim size.  <div><img src="/assets/mi/system/images/contextual-help/R2-width.png" /></div>
  • The aspect ratio is the relationship of a tire's sidewall height to its section width, expressed as a percentage. In this example, the tire sidewall height is approximately 55% of the tire width. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.<div><img src="/assets/mi/system/images/contextual-help/R2-aspect.png" /></div>
  • The diameter of the rim in inches.<div><img src="/assets/mi/system/images/contextual-help/R2-diameter.png" /></div>
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  • If you know the name of the tire are looking for, select the tire from the list below.

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  • All tires fall into certain categories. If you're wanting to do a broad search of our tire lines, use the list below.

  • All tires fall into certain categories. If you're wanting to do a broad search of our tire lines, use the list below.
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