Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 04-14-2014, 01:33 PM   #1 (permalink)
ConnClark's Avatar
Join Date: Jun 2008
Location: Richland,WA
Posts: 967

Das Schlepper Frog - '85 Mercedes Benz 300SD
90 day: 23.23 mpg (US)

Gentoo320 - '04 Mercedes C320 4Matic
90 day: 22.44 mpg (US)
Thanks: 46
Thanked 227 Times in 156 Posts
Everything you ever wanted to know about tires

Everything You ever wanted to know about tires.


  Reply With Quote
The Following 5 Users Say Thank You to ConnClark For This Useful Post:
gone-ot (04-16-2014), jedi_sol (04-14-2014), Joggernot (04-15-2014), Jyden (04-14-2014), RedDevil (04-16-2014)
Alt Today
Popular topics

Other popular topics in this forum...

Old 04-15-2014, 06:21 PM   #2 (permalink)
Master EcoModder
Join Date: May 2012
Location: USA
Posts: 2,643
Thanks: 1,502
Thanked 276 Times in 226 Posts
Having worked for sears tire america I can say they are temperature sensitive and "spoil" so to speak like food does. The brown color isnt a good color and is usually followed by cracking and separation. The black color is actually painted on the tire and protects it.

Lastly tires are made up of parts and you can break a band, belt, etc inside on a pot hole and get a vibration or see a pimple on the tread as well as sidewall area.
  Reply With Quote
Old 04-16-2014, 07:55 AM   #3 (permalink)
Tire Geek
CapriRacer's Avatar
Join Date: May 2008
Location: Let's just say I'm in the US
Posts: 765
Thanks: 3
Thanked 353 Times in 217 Posts
A couple of thoughts:

First - the brown color is the antioxidants (AO's), which were put in the tire to protect the rubber from attack by oxygen. I suspect the brown color is because they are iron based (rust). When first placed into service, many tires will quickly show this color, as during storage and shipment some of the AO's will be used up, but since the tire isn't being flexed, the AO's pretty much stay where they are - BUT - during the first bit of flexing, the used up AO's quickly migrate to the surface and make a strong color change. The waxes that are in the rubber do the same and capture the used up AO's. The waxes and captured AO's eventually flake off.

Another time the brown color shows up is when a tire experiences high heat. That will sometimes use up the last of the AO's. The next step in the process is cracking, a symptom of the rubber breaking down - which leads to a separation.

Broken belts is a fairly rare phenomenon - but irregular wear is commonly misdiagnosed as this. Irregular wear is usually caused by misalignment and aggravated by insufficient rotation and inflation practices.


Visit my website: www.BarrysTireTech.com
  Reply With Quote
Reply  Post New Thread

Thread Tools

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com