Originally Posted by
Creakyknees
to my understanding, the Kwanza uses dirt roads, yes? Are you concerned you might chip your bike, especially if it's carbon?
anyway, you'll probably get better feedback in the other forum:
"Dirt Roads" doesn't really capture it. All of it has gravel made up of flint (i.e. arrow heads) Some of it is pretty decent roadway. Some of it is designated as "minimal maintenance" and is closer to a trail, and only passable by SUV.
You couldn't do it on a road bike. The Organizers reccomend at least 2 inch wide tires. I did it on a Cyclocross bike running 40mm Schwalbe Marathon Supremes.
There's a thread in the cyclocross forum about tire selection.