I have been using Roman Circus for light chariot racing games. The rules are the right balance of beer and pretzels as well as what seems to be a good representation of chariot racing. I have been using reproductions of Marx Ben Hur play set chariots in 54mm (see a previous post on this subject). I wanted to replicate that game in 10mm for easy transport on airplane flights, etc. While there are a number of manufacturers of accurate racing chariots in 10mm and 15mm, I was wanted that Ben Hur look. When I found the right looking chariots, they had the wrong drivers and vice versa. I sent an Email to Richard at Magister Millitum. He combined chariots from one catalog item with drivers from another. I finished painting them this weekend, and made two tracks for them: and typical oval one and one in a figure eight.
These were inexpensive enough that I even ordered six chariots without horses or drivers to make wreck markers in the game. All of this will fit into a single Really Useful Box, so I will likely bring the game with me to Historicon next weekend for pickup games.