Where we usually run, I can tell without chalk/marker because the surface is abrasive enough that fresh scuffs show up well. If you're not familiar with your tires or the surface doesn't generate much grip than marking the tires is a good thing to do.
Oh... and if you have a chance, throw in as much static camber as you can before the event.
Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)