...the roll-up sheet foam rubber is 72" wide (recent factory rolls have been 73" wide), X whatever length you want, up to 30 feet.
This surface is custom made for us from a Canadian flooring manufacturer. Send me an email to
lecherry@rogers.com if you want more details. I've had many enquiries over the last month or so, so I'm going to do another factory run very soon.
I'm also building a 20' full road course now, inspired by some drawings Sinister did. (Thanks, Sinister ... I'm working to get the costs of that complex course down). And, I'm working on some of the generic infield pieces, so that they may be standardized and we can bring the cost of the tracks down somewhat.