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Speed Ratings
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Service
Description
Many tires
come with a service description added on to the end of the tire's size.
These service descriptions contain a two-digit number (load index) and a
letter (speed rating).
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A tire receives its speed
rating by the U.S. Government through meeting minimumstandards
for reaching and sustaining a specified speed. What does that mean to
you? Well,
in general, a higher speed rating will result in better car handling.
We do not recommend downgrading the speed
rating of your tires. This may result in
poor handling and unpredictable steering. However, if
you want better cornering response,
there is no problem installing a higher speed rated tire on your
vehicle.
Below is a list of speed ratings along
with the corresponding speeds they represent.
Remember, the speeds are test speeds, not recommended speeds and apply
only to the tire, not to the vehicle. Putting a speed rated tire on any
car does not mean the car can be operated at the tire's rated speed.
- Q —
Up to 100mph
- S
—
Up to 112mph
- T
—
Up to 118mph
- H
—
Up to 130mph
V
—
Up to 149mph
Z — 149mph and over
W —
Up to 168mph
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