Tire Depth Gauge?

Papasmurf10 wrote:
Beverly & Ken,

I will send you an official US tire tread measuring penny for only $19.95 plus $12.50 shipping and handling. But wait there's more!!! Act within the next 30 minutes and I will double your order for just the additional S&H.

Actually we have acquired a handful. Only cost us a couple a thousand dollars, been at Disney's Fort Wilderness for 2 weeks with grandsons.
Actually your shipping is quite reasonable compared to UPS and there cross border brokerage fees.

Beverley & Ken

Put a (US) penny in the tread with Lincoln's head pointing toward the center of the tire. If the tread covers the top of Lincoln's head, the tread is OK.

Beverly & Ken,

I will send you an official US tire tread measuring penny for only $19.95 plus $12.50 shipping and handling. But wait there's more!!! Act within the next 30 minutes and I will double your order for just the additional S&H.

mockturtle wrote:
Don't most tire failures come from the sidewalls rather than the tread, anyway? Certainly tread wear affects safe handling but I'll bet the sidewalls fail before the tread becomes thin enough to be a concern.

No. Most tire failures are "Belt leaving Belt Separations" - commonly called a "Tread Separation". Sidewall separations are virtually unheard of.

- BUT -

There are tire failures caused by road hazards - such a punctures - that are frequently mis-diagnosed. The most common is called a "Run Flat", where the tread detaches in the form of a hoop from the sidewalls - and as the name implies, the cause is a tire being operated with little or no inflation pressure. 90% of the time, there is a visible puncture - and the other 10% the damage is disguised in the sidewall damage.

I think (at least some) new RV/LT tires are 12- or 14/32.

I was fleet maintenance officer for our dept's cruisers and always carried a tread gauge in my pocket. I was one of the worst to wear out tires as I had a reputation for never getting out of my car while on the job unless something happened. I also used the Lincoln Penny which works just as well. The reason we kept an eye on the tread is because we needed handling at all times and never worried about the sidewalls because the tread wore out long before the sidewalls.

Don't most tire failures come from the sidewalls rather than the tread, anyway? Certainly tread wear affects safe handling but I'll bet the sidewalls fail before the tread becomes thin enough to be a concern.

SAR Tracker wrote:
The one I use only costs a penny, and it never wears out.:B

.
Unless you're in Canada. Our govt officially mothballed the penny earlier this year. We will have to figure the 2/32 mark on the nickel.

Beverley & Ken

The one I use only costs a penny, and it never wears out.:B

Yes, but the gauges read in 1/32 increments. And the tire shops all talk in 1/32". If you go in and say "my tires are 3/16" instead of 6/32", they'll know you are a novice.