2012 MercedesBenz S550 Tire Size
Your MercedesBenz was manufactured with different tire sizes. To determine the best tire size for your specific 2012 MercedesBenz S550, we first need to determine your rim size. Please review the information below.
How to Determine Rim Size
Check your existing tires. Your MercedesBenz S550's rim size is the number to the right of the R. In the example pictured here, the tire size fits 16inch rims.
Rim Size Selection
Now that you know your rim size, make a selection below to filter your results.
18Inch Rims
2012 MercedesBenz S550
The original tire size for your 2012 MercedesBenz S550 is listed below. Tap on the box to view a colorcoded explanation of your MercedesBenz S550's' tire size.
Trim Options:
4MaticBase
255/45R18 99
Simplified Size: 2554518
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/45R18 99H. A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
255  This number indicates that your tire has a width of 255 millimeters.  
18  The tire size was designed to fit rims or wheels that are 18 inches in diameter.  
99  This tire has a load index of 99, which means it's capable of carrying a load of 1705 pounds (775 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
45  This number means that your tire has an aspect ratio of 45%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width. In this case, the sidewall height works out to be 114 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
19Inch Rims
2012 MercedesBenz S550
There are multiple tire sizes for your 2012 MercedesBenz S550 that depend upon the trim level. Look for your trim level below to get a colorcoded explanation of your tire size. Then pick the best tire size for your 2012 MercedesBenz S550.
Trim Options:
4Matic w/Sport Pkg.
255/40R19 96
Simplified Size: 2554019
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/40R19 96Y. A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
255  This number indicates that your tire has a width of 255 millimeters.  
19  The tire size was designed to fit rims or wheels that are 19 inches in diameter.  
96  This tire has a load index of 96, which means it's capable of carrying a load of 1562 pounds (710 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
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.
 
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. 
275/40R19 101(Rear)
Simplified Size: 2554019
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/40R19/XL 100V (Front). A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
275  This number indicates that your tire has a width of 275 millimeters.  
19  The tire size was designed to fit rims or wheels that are 19 inches in diameter.  
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.  
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 110 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
This tire has a speed rating of V, which means 149 mph (240 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
255/40R19/XL 100(Front)
Simplified Size: 2754019
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/40R19/XL 100V (Front). A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
255  This number indicates that your tire has a width of 255 millimeters.  
19  The tire size was designed to fit rims or wheels that are 19 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.  
100  This tire has a load index of 100, which means it's capable of carrying a load of 1760 pounds (800 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
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.
 
This tire has a speed rating of V, which means 149 mph (240 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. 
Trim Options:
4Matic w/Sport Pkg.
255/40R19/XL 100
Simplified Size: 2554019
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/40R19/XL 100Y. A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
255  This number indicates that your tire has a width of 255 millimeters.  
19  The tire size was designed to fit rims or wheels that are 19 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.  
100  This tire has a load index of 100, which means it's capable of carrying a load of 1760 pounds (800 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
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.
 
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:
w/Sport Pkg.
275/40R19 101(Rear)
Simplified Size: 2554019
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/40R19/XL 100Y (Front). A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
275  This number indicates that your tire has a width of 275 millimeters.  
19  The tire size was designed to fit rims or wheels that are 19 inches in diameter.  
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.  
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 110 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
 
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:
w/Sport Pkg.
255/40R19/XL 100(Front)
Simplified Size: 2754019
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/40R19/XL 100Y (Front). A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
255  This number indicates that your tire has a width of 255 millimeters.  
19  The tire size was designed to fit rims or wheels that are 19 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.  
100  This tire has a load index of 100, which means it's capable of carrying a load of 1760 pounds (800 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite.  
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.
 
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. 
20Inch Rims
2012 MercedesBenz S550
The original tire size for your 2012 MercedesBenz S550 is listed below. Tap on the box to view a colorcoded explanation of your MercedesBenz S550's' tire size.
Trim Options:
w/Sport Pkg.
275/35ZR20/XL(Rear)
Simplified Size: 2553520
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/35ZR20/XL (Front). A colorcoded explanation of the 2012 MercedesBenz S550's tire size is shown below.
275  This number indicates that your tire has a width of 275 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.  
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 96 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

Trim Options:
w/Sport Pkg.
255/35ZR20/XL(Front)
Simplified Size: 2753520
Simplified size is useful for shopping and buying tires.
The original tire size for your 2012 MercedesBenz S550 is 255/35ZR20/XL (Front). A colorcoded explanation of the 2012 MercedesBenz S550'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.  
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 89 millimeters.  
R  This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
