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Related Categories: What Does Z Mean On The Tires | Speed Ratings Explained | H Speed Rating | Z Rated Tires | Speed Rating Chart | Best Z Rated Tires | Speed Rating | Speed Rating Letters | Lower Speed Rating | Zr Speed Rated

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What's in a letter?


T, Z, W...These letters appear on a tire, but what do they mean? Speed ratings can be a little confusing. I get many calls like this one: "I have an 08 BMW 328i and I need a Z-rated tire." To be honest, Z-rated used to mean a lot more than it does now. When speed ratings first came out, Z was thought…

Related Products: What Does Z Mean On The Tires | Speed Rating Chart | Speed Rating Letters
 

Understanding Speed Ratings


…means? For example, the "Z" in 245/45ZR17 or the "H" in 205/55R16 89H. This letter is the speed rating of the tire. Tires are tested in laboratory conditions under load by tire manufacturers to determine the maximum speed capability of the tire. Shown below is what the speed rating letter equates to in MPH…

Related Products: H Speed Rating | Speed Rating | Q Speed Rating
 

Speed Rating. Why is it Important?


Speed ratings are as follows: S: 112 mph T: 118 mph U: 124 mph H: 130 mph V: 149 mph Z: Was the highest rating in the 1980s at 150 + mph With the advent of new sports cars that well exceeded the 150 mph barrier, the tire industry adopted a few new speed ratings: W: 168 mph Y: 186 mph Every tire that…

Related Products: H V T Rating | Lower Speed Rating | V Speed Rating
 
Longest-Wearing Z-Rated Performance Tires

Longest-Wearing Z-Rated Performance Tires


…long that it has become a common misconception that all low profile tires or tires with a high speed rating have rapid treadwear. On the contrary, there are options available with long treadwear ratings. Three of the best to consider are the Michelin Pilot Sport A/S 3, Hankook Ventus S1 noble2 and Continental…

Related Products: Best Treadwear | Best Low Profile Tire | Z Rated Tires
 

Z-speed rated tires. Where have they gone? No worries; they're still here.


…and they're not Z-speed rated? What's the deal here? Back in the day, high performance tires were all Z-speed rated. They were tested at some speed above 149 mph. In order to be more precise, tire manufacturers started testing at 168 mph (W-speed rating) and 186 mph (Y-speed rating). In the above picture…

Related Products: Zr Speed Rated | Zr Rating | Z Rated Tires
 

Tire Tech Information - Air Pressure/Load Adjustment for High Speed Driving (Z-Speed Rated Tires)


…. More Speed Rating Charts * R-Speed Rated Tires * S-Speed Rated Tires * T-Speed Rated Tires * U-Speed Rated Tires * H-Speed Rated Tires * V-Speed Rated Tires * W-Speed Rated Tires * Y-Speed Rated Tires Home > Tires > Tech > Air Pressure/Load Adjustment for High Speed Driving (Z-Speed Rated Tires) JOIN…

Related Products: 230 | 124 | 161
 

Tire Tech Information - How to Read Speed Rating, Load Index & Service Descriptions


…tire's load index and speed rating. Service descriptions are required on all speed rated (except for Z-speed rated) tires manufactured since 1991. The first two digits (87S) represent the tire's load index and are followed by a single letter (87S) identifying the tire's speed rating. "Using a P195/60R15…

Related Products: Speed Rating Chart | Speed Ratings Explained | Speed Rating Letters
 

Tire Test Results : BFGoodrich Brings Sport to the High Performance All-Season Tire Category


…high grip levels. And while a tire's speed rating isn't a true performance rating, overall tire performance levels tend to climb or fall with higher or lower speed ratings. High Performance All-Season tires, on the other hand, are H- (or sometimes V-) speed rated, deliver a blend of reasonable road manners…

Related Products: Kumho Ecsta Ast | Yokohama Avid H4s | 225 45r17 91h
 

Tire Tech Information - Air Pressure / Load Adjustment for High Speed Driving


…order to surpass high speed driving stresses. In order to accomplish this, the tire inflation pressure recommendations and the tire's rated load capacities are customized when speeds exceed 160 km/h (99 mph) for all tires up to and including a V-speed rating, and when speeds exceed 190 km/h (118 mph…

Related Products: 835 | Sidewall Deflection | Speed Rating V Vs H
 

Tire Tech Information - Flat Tire Repairs' Effect on Speed Rating


…specified multi-step procedure. Several other manufacturers specify their highest speed-rated tires (originally V-, Z-, W- or Y-speed rated) can be driven no faster than the 130 mph speeds permitted of a lower H-speed rating. However, most tire manufacturers reason

Related Products: W Speed Rating | Nail Repair | Repair Run Flat Tire
 

Sumitomo Tires


…High Performance All-Season HTR A/S P01 (W-Speed Rated) (204) HTR A/S P02 (W-Speed Rated) (2) High Performance All-Season HTR A/S P01 (H- or V-Speed Rated) (305) HTR A/S P02 (H- or V-Speed Rated) (2) Standard Touring All-Season HTR Enhance L/X (T-Speed Rated) (6) HTR T4 (81) Touring LS T (69) Grand Touring…

Related Products: Sumitomo Touring Reviews | Sumitomo Reviews | Sumitomo Tour P
 

TireRack.com - About - Tech Center


…Flat Tire Repairs' Effect on Speed Rating Flat-Spotted Tires (Due to Brake Lockup / Slide) Flat-Spotted Tires (Due to Parking / Storage) Government Tire Approval Marks How Do I Compare Price vs. Value? How to Install Your Tire & Wheel Package How to Read Speed Rating, Load Index & Service Descriptions…

Related Products: Diameter Chart | Tire Size Equivalent Calculator | Load Range Charts
 
Related Categories: What Does Z Mean On The Tires | Speed Ratings Explained | H Speed Rating | Z Rated Tires | Speed Rating Chart | Best Z Rated Tires | Speed Rating | Speed Rating Letters | Lower Speed Rating | Zr Speed Rated
 
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