Real simple basic what is allowed and how to repair tires. The combination
plug/patch is the best way to go. A plug alone will evenatually allow air to
get between the layers. A patch oly will allow water to get between the
layers from the outside, rusting and expanding the steel belts

http://www.conti-online.com/generator/www/us/en/continental/automobile/themes/contiacademy/drivers_ed/tire_repair_en.pdf

Dennis

>From: Keith Ovregaard <kovregaard@GMAIL.COM>
>Reply-To: Keith Ovregaard <kovregaard@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Trip Contingencies
>Date: Mon, 25 Aug 2008 09:11:16 -0700
>
>Illegal to plug a tire? Sidewalls, yes, but the tread area? That's news to
>me! What state? I've had several tires plugged by my local tire shop
>without
>question. Also plugged a tire myself and it's been fine for 16k miles.
>Should I be taking this to the tire shop to be patched?
>
>Keith O