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 > Unusual tire wear

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spotrot

Indian Rocks Beach, FL

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Posted: 03/29/20 06:37am Link  |  Quote  |  Print  |  Notify Moderator

The previous photos were of another members tires. I'm trying to attach photos of the tires described in this post


https://photos.google.com/photo/AF1QipPoC4hsgmNrTY_rcPY9zk4zSoIGpLovviaz2D_e


https://photos.google.com/search/_tra_/photo/AF1QipMsc4uFQ6kzpcoANV3k_elgLtiUTYJGUAOxyGGk

spotrot

Indian Rocks Beach, FL

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Posted: 03/29/20 06:59am Link  |  Quote  |  Print  |  Notify Moderator

[image]

2nd try

spotrot

Indian Rocks Beach, FL

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Posted: 03/29/20 07:01am Link  |  Quote  |  Print  |  Notify Moderator

3rd try[image]

spotrot

Indian Rocks Beach, FL

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Posted: 03/29/20 07:11am Link  |  Quote  |  Print  |  Notify Moderator

It's interesting that the lighter colored rubber that is exposed is on the INNER portion of the outer tread, closest to where the tread is still fairly [image]deep -- not on the outer portion of the outer tread where you'd expect the most wear.

wolfe10

Texas

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Posted: 03/29/20 07:25am Link  |  Quote  |  Print  |  Notify Moderator

Contact Roger Marble-- this is what he did for a living (retired tire forensic engineer):

Roger monitors the FMCA Forum and is on the FMCA Technical Advisory Committee.

You can make a post in this area: https://community.fmca.com/forum/17-tires/ There is no cost to participate in the FMCA Forum and is even open to non-FMCA members.

Just click on "Start new topic".

* This post was edited 03/29/20 08:25am by wolfe10 *


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CapriRacer

Somewhere in the US

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Posted: 03/29/20 10:05am Link  |  Quote  |  Print  |  Notify Moderator

spotrot wrote:

3rd try[image]

It's a little hard to tell how much wear there is, but this looks like the base compound being exposed. Nothing to worry about, except that you are very near to needing to replace that tire.

Background: When a tire is made, the tread rubber is extruded in a slab, cut to length, then wrapped around the uncured tire and the ends of the tread slab are spliced together to form a smooth, continuous looking tread. (Note: The tread splice is cut at about a 45° angle)

It is common for the tread slab to be 2 extrusions in one: A Cap Tread (made of a good wearing rubber) over top of a Base Tread (made of a cooler running, but poorer wearing compound.) The idea is that the base shouldn't be exposed, but if it is, it will be at the end of the treadlife and not matter in the big scheme of things.

Edit: Apparently, I was lucky enough to be able to see the photo before it disappeared.


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time2roll

Southern California

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Posted: 03/29/20 10:53am Link  |  Quote  |  Print  |  Notify Moderator

http://photoposting.is-great.net/?i=1


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spotrot

Indian Rocks Beach, FL

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Posted: 03/29/20 10:56am Link  |  Quote  |  Print  |  Notify Moderator



Thank you

[image]

spotrot

Indian Rocks Beach, FL

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Posted: 03/29/20 10:58am Link  |  Quote  |  Print  |  Notify Moderator

CapriRacer wrote:

spotrot wrote:

3rd try[image]

It's a little hard to tell how much wear there is, but this looks like the base compound being exposed. Nothing to worry about, except that you are very near to needing to replace that tire.

Background: When a tire is made, the tread rubber is extruded in a slab, cut to length, then wrapped around the uncured tire and the ends of the tread slab are spliced together to form a smooth, continuous looking tread. (Note: The tread splice is cut at about a 45° angle)

It is common for the tread slab to be 2 extrusions in one: A Cap Tread (made of a good wearing rubber) over top of a Base Tread (made of a cooler running, but poorer wearing compound.) The idea is that the base shouldn't be exposed, but if it is, it will be at the end of the treadlife and not matter in the big scheme of things.

Edit: Apparently, I was lucky enough to be able to see the photo before it disappeared.


Thank you for the detailed info and the website on your profile is the best I've ever seen about tires:
http://www.barrystiretech.com/index.html

spotrot

Indian Rocks Beach, FL

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Posted: 04/01/20 04:01pm Link  |  Quote  |  Print  |  Notify Moderator

wolfe10 wrote:

Contact Roger Marble-- this is what he did for a living (retired tire forensic engineer):

Roger monitors the FMCA Forum and is on the FMCA Technical Advisory Committee.

You can make a post in this area: https://community.fmca.com/forum/17-tires/ There is no cost to participate in the FMCA Forum and is even open to non-FMCA members.

Just click on "Start new topic".


Thank, very informative site. I tried posting with "start new topic" but it now requires that you pay an annual fee to join and post

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