2018 Mercedes-Benz S63 AMG Tire Size

The original tire size for your 2018 Mercedes-Benz S63 AMG is listed below. Tap on the box to view a color-coded explanation of the best Mercedes-Benz S63 AMG tire size.

Trim Options:

4Matic Coupe & Cabriolet4Matic Sedan

285/35ZR20/XL (104Y)(Rear)

Simplified Size:  255-40-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Mercedes-Benz S63 AMG is 255/40ZR20/XL 101(Y) (Front).  A color-coded explanation of the 2018 Mercedes-Benz S63 AMG's tire size is shown below.

285

This number indicates that your tire has a width of 285 millimeters.

20

The tire size was designed to fit rims or wheels that are 20 inches in diameter.

XL

The mark of XL means extra load.  A tire with this designation can handle higher inflation pressures than a regular tire, which increases its maximum load.

104

This tire has a load index of 104, which means it's capable of carrying a load of 1980 pounds (900 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

Z

This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h).  A tire's speed class is less specific than the speed rating.

35

This number means that your tire has an aspect ratio of 35%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width.  In this case, the sidewall height works out to be 99 millimeters.

R

This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

RRadial
BBias Belt
DDiagonal
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

Trim Options:

4Matic Coupe & Cabriolet4Matic Sedan

255/40ZR20/XL (101Y)(Front)

Simplified Size:  285-35-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Mercedes-Benz S63 AMG is 255/40ZR20/XL 101(Y) (Front).  A color-coded explanation of the 2018 Mercedes-Benz S63 AMG's tire size is shown below.

255

This number indicates that your tire has a width of 255 millimeters.

20

The tire size was designed to fit rims or wheels that are 20 inches in diameter.

XL

The mark of XL means extra load.  A tire with this designation can handle higher inflation pressures than a regular tire, which increases its maximum load.

101

This tire has a load index of 101, which means it's capable of carrying a load of 1815 pounds (825 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

Z

This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h).  A tire's speed class is less specific than the speed rating.

40

This number means that your tire has an aspect ratio of 40%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width.  In this case, the sidewall height works out to be 102 millimeters.

R

This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

RRadial
BBias Belt
DDiagonal
Y

This tire has a speed rating of Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.