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Author Topic: Tire tread depth Back to Topics
2Tall
Champion Author
Maryland

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Message Posted: Mar 30, 2013 10:43:22 AM

Do you use a U.S. coin? Place a penny into several tread grooves across the tire. If part of Lincoln's head is always covered by the tread, you have more than 2/32" of tread depth remaining or a quarter into several tread grooves across the tire. If part of Washington's head is always covered by the tread, you have more than 4/32" of tread depth remaining.
REPLIES (newest first) Post a Reply
toms1120
Champion Author Maryland

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Message Posted: Apr 1, 2013 6:49:55 PM

Penny works.
CactusBobs
Champion Author Arizona

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Message Posted: Apr 1, 2013 12:59:01 PM

It only rains a few times a year where i live
so
I run tires till there very bald
OceanArcher
Champion Author Mississippi

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Message Posted: Apr 1, 2013 12:38:29 PM

The "penny test" is my guideline (2/32 in) is time for replacement
bluenvoy
Champion Author Nashville

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Message Posted: Apr 1, 2013 9:34:03 AM

My tires are good now since I bought new ones for my SUV.
Titanic1985
Champion Author South Carolina

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Message Posted: Apr 1, 2013 9:00:02 AM

Good Morning 2Tall,

Isn't it strange that the penny & quarter method has been around for many decades and is accurate?

You allude to something though that is equally important. You said, "... several tread groves across the tire". Several years ago I went with my daughter to a national used car business to replace my daughter's graduation present (she totaled it by failing to yield the right of way). One of their what I call gimmicks is a dummy oriented tire depth gauge. It didn't have 32nd of an inch increments on it but green, yellow and red segments. Here is where I'm going with this thought. They replaced the two rear tires, but not the fronts. Just for the record, Michelin and the US Government say the new tires go on the rear, not the front as would thought on a FWD vehicle. This is also affirmed by tirerack.com. Getting back to the front tires, I can tell how many 32nds are left after working in a garage and dealing with many tires. Yes, the tread was 4/32" in the middle three treads (their minimum), but NOT on the outside treads. Huh? Either this vehicle had alignment problems or a very race prone driver. They refused to replace the tires because it met THEIR criteria. It certainly didn't meet mine, nor did the Chinese tires placed on the rear!

Take care :-). MGY

[Edited by: Titanic1985 at 4/1/2013 9:01:32 AM EST]
WEPSMAN
Champion Author South Dakota

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Message Posted: Mar 31, 2013 6:03:42 PM

I usually go by the wear bars. They are also 2/32".
DasAuto92
Champion Author Montreal

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Message Posted: Mar 30, 2013 10:17:09 PM

Naw..... This Canuck uses the proper tire depth gauge.
14smoke
Champion Author Birmingham

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Message Posted: Mar 30, 2013 10:10:26 PM

Have heard that before, many times.
bearscharger
Champion Author Cleveland

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Message Posted: Mar 30, 2013 9:26:38 PM

i go to the wear bars
chipote
Champion Author Washington

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Message Posted: Mar 30, 2013 11:41:48 AM

I replace tires at 4/32 left
metalhat73
Champion Author Wilmington

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Message Posted: Mar 30, 2013 11:07:38 AM

No. I wait till the wear bar shows. Haven't used a penny in years. :P
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