Topic: Tire Speed Ratings and other good info
in Forum: C3 Engines, Driveline and Handling
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--SPEED RATINGS
Here is a list of speed ratings along with the speeds they represent. Note: The speeds are test speeds - not recommended speeds.
Q - up to 100 mph.
S - up to 112 mph.
T - up to 118 mph.
U - up to 124 mph.
H - up to 130 pmh.
V - up to 149 mph.
W - up to 168 pmh.
Y - up to 186 mph.
Z - 149 mph. & over
When Z appears in the tire size designation (235 - 45ZR17) it signifies a maximum speed capability in excess of 149 mph. If a service description also appears, the maximum speed is indicated by the service description.
235/45ZR17 - 149+ mph
235/45ZR17 99W - 168 mph
235/45ZR17 99Y - 186 mph
Do not mix and match tires with different speed ratings on your vehicle. This can cause serious problems with the handling of your vehicle. If you desire better cornering response, there is no problem installing a higher speed rated tire on your vehicle.
--PLUS SIZING FITMENTS
ADVANTAGES OF PLUS CONCEPT
Improve both the performance and appearance of your vehicle.
Faster Steering Response
Better Lateral Stability
More Grip in Cornering
By using a larger diameter wheel with a lower profile tire, it is possible to properly maintain the overall tire diameter - keeping speedometer and odometer changes negligible.
EXAMPLES OF CONVERSIONS
O.E. - 175/70 R13
Plus 1 - 185/60 R14
Plus 2 - 195-50 R15
Plus 3 - 205/40 R16
Plus 4 - 205/40 R17
O.E. - 195/70 R14
Plus 1 - 205-60 R15
Plus 2 - 225/50 R16
Plus 3 - 235-40 R17
Body and chassis clearance under operating conditions should be carefully checked for every model. Lowered vehicles should be custom fitted by one of our resident technicians
--WHEEL INFORMATION
WHY ALLOY WHEELS?
Aesthetic value (wheel beauty)
Reduced unsprung weight
Improved braking and acceleration by reducing the weight of the vehicle's rotational mass
Ability to plus size fitments
WHEEL CONSTRUCTION
Aluminum alloy wheels are available in one piece, two piece and three piece construction.
Here is a list of speed ratings along with the speeds they represent. Note: The speeds are test speeds - not recommended speeds.
Q - up to 100 mph.
S - up to 112 mph.
T - up to 118 mph.
U - up to 124 mph.
H - up to 130 pmh.
V - up to 149 mph.
W - up to 168 pmh.
Y - up to 186 mph.
Z - 149 mph. & over
When Z appears in the tire size designation (235 - 45ZR17) it signifies a maximum speed capability in excess of 149 mph. If a service description also appears, the maximum speed is indicated by the service description.
235/45ZR17 - 149+ mph
235/45ZR17 99W - 168 mph
235/45ZR17 99Y - 186 mph
Do not mix and match tires with different speed ratings on your vehicle. This can cause serious problems with the handling of your vehicle. If you desire better cornering response, there is no problem installing a higher speed rated tire on your vehicle.
--PLUS SIZING FITMENTS
ADVANTAGES OF PLUS CONCEPT
Improve both the performance and appearance of your vehicle.
Faster Steering Response
Better Lateral Stability
More Grip in Cornering
By using a larger diameter wheel with a lower profile tire, it is possible to properly maintain the overall tire diameter - keeping speedometer and odometer changes negligible.
EXAMPLES OF CONVERSIONS
O.E. - 175/70 R13
Plus 1 - 185/60 R14
Plus 2 - 195-50 R15
Plus 3 - 205/40 R16
Plus 4 - 205/40 R17
O.E. - 195/70 R14
Plus 1 - 205-60 R15
Plus 2 - 225/50 R16
Plus 3 - 235-40 R17
Body and chassis clearance under operating conditions should be carefully checked for every model. Lowered vehicles should be custom fitted by one of our resident technicians
--WHEEL INFORMATION
WHY ALLOY WHEELS?
Aesthetic value (wheel beauty)
Reduced unsprung weight
Improved braking and acceleration by reducing the weight of the vehicle's rotational mass
Ability to plus size fitments
WHEEL CONSTRUCTION
Aluminum alloy wheels are available in one piece, two piece and three piece construction.
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