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Old 06-21-2003, 01:50 PM   #15 (permalink)
Sion
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Location: In the room where the giant fire puffer works, and the torture never stops.
Quote:
Originally posted by JStrider
wow... musta been scary...

how do we tell what speed tires are rated at... cuz when im drivin to cali from lubbock the speed limits for a good part of the way are 75 and im goin 80-85ish... it would be good to know if i need to go a lil slower...


a typical tire size is P225/75R15S

P is for P-metric
R is for radial (as opposed to bias ply)
the last letter (in this case "s") is the speed rating

some manufacturers us this syntax P225/75SR15, placing the speed rating before the R

note: just because you have high speed rated tires does NOT mean the you cant have a blowout while travelling at a speed lower than the rating. in fact, most blowouts are not caused by speed, but rather by something in the road (debris, a pothole, etc) damaging the tire.

blowouts due to speeding most often occur while cornering, which places the most amount of stress on the tire, particularly the sidewalls.
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