Tire Question

[FastRam]

The stock Pirellis are sized at 305-40-22, ZR speed rated. After the size, imprinted on the sidewall is "114 W". What does the 114 W mean?

 

[SHU-DOG]

The stock Pirellis are sized at 305-40-22, ZR speed rated. After the size, imprinted on the sidewall is "114 W". What does the 114 W mean?

If im not mistaken its the speed rating. 114 "W" means approved for CONSTANT SPEED over 146 MPH. Max of i think 176mph

More to do with tire failure and High Performance Driving.

The only other manufacturer with a "W" is Continental

The others have "V" or 126(?) mph constant and max of like 148?

I will have to check those. Or maybe someone has them.

SHU

 

[HaroldD]

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
"When Z-speed rated tires were first introduced, they were thought to reflect the highest tire speed rating that would ever be required, in excess of 240 km/h or 149 mph. While Z-speed rated tires are capable of speeds in excess of 149 mph, how far above 149 mph was not identified. That ultimately caused the automotive industry to add W- and Y-speed ratings to identify the tires that meet the needs of new vehicles that have extremely high top-speed capabilities.

W 168 mph 270 km/h Exotic Sports Cars
Y 186 mph 300 km/h Exotic Sports Cars


While a Z-speed rating still often appears in the tire size designation of these tires, such as 225/50ZR16 91W, the Z in the size signifies a maximum speed capability in excess of 149 mph, 240 km/h; the W in the service description indicates the tire's 168 mph, 270 km/h maximum speed."

 

[VENOMOUS1 RACING]

The stock Pirellis are sized at 305-40-22, ZR speed rated. After the size, imprinted on the sidewall is "114 W". What does the 114 W mean?

THey are actually W speed rated at 168+, most Z are only 149. W and V are rated higher.
The 114 is the load rating or amount of weight on that corner of the vehicle cannot exceed this #.

 

[VENOMOUS1 RACING]

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
"When Z-speed rated tires were first introduced, they were thought to reflect the highest tire speed rating that would ever be required, in excess of 240 km/h or 149 mph. While Z-speed rated tires are capable of speeds in excess of 149 mph, how far above 149 mph was not identified. That ultimately caused the automotive industry to add W- and Y-speed ratings to identify the tires that meet the needs of new vehicles that have extremely high top-speed capabilities.

W 168 mph 270 km/h Exotic Sports Cars
Y 186 mph 300 km/h Exotic Sports Cars


While a Z-speed rating still often appears in the tire size designation of these tires, such as 225/50ZR16 91W, the Z in the size signifies a maximum speed capability in excess of 149 mph, 240 km/h; the W in the service description indicates the tire's 168 mph, 270 km/h maximum speed."

Exakry like he said!!:marchmellow:

 

[JTS VENOM PERFORMANCE]

means they are wound

 

[alexspop]

If I am not mistaken, the 114 has to do with the load rating.

 

[Riff62]

I thought 114 was the number of times you could do a 10 sec burnout before they would need to be replaced..lol

 

[HaroldD]

Yup - from the same page I quoted earlier:

"Load Index

P195/60R15 87S - The load index (87) is the tire size's assigned numerical value used to compare relative load carrying capabilities. In the case of our example the 87 identifies the tires ability to carry approximately 1,201 pounds.

The higher the tire's load index number, the greater its load carrying capacity.

89 = 1,279 pounds
88 = 1,235 pounds
87 = 1,201 pounds
86 = 1,168 pounds
85 = 1,135 pounds

A tire with a higher load index than that of the Original Equipment tire indicates an increase in load capacity. A tire with a load index equal to that of the Original Equipment tire indicates an equivalent load capacity. A tire with a lower load index than the Original Equipment tire indicates the tire does not equal the load capacity of the original.

Typically, the load indexes of the tires used on passenger cars and light trucks range from 70 to 110."

If I am not mistaken, the 114 has to do with the load rating.

 

[VENOMOUS1 RACING]

And ours being a 114 have even more load carrying capacity. They also make a 305/45-22 that has the 118 rating. Some of your commercial trucks with heavy duty tires far exceed these ratings.