Tourist in MSN There's a recent Cycling About post with detailed information on wax systems. Interesting read. For a deep dive into waxing, Zero Friction Cycle is perhaps the best. No doubt that recent systems are much more efficient/durable than the parrafin you find at the corner store.

Tourist in MSN str I took to the habit of carrying a second chain (a Wipperman sx10 - 226g) years ago. A typical trip, back then, would push wear close to the 5% mark, beyond which there's potential damage to the cassette (and perhaps even chainrings). Perhaps excessive with wet lube, but from what I read, wax systems do not work well in wet condition.

The typical advice is to re-wax ASAP. Drip wax takes a long time to settle (i.e for the carrier to evaporate), so if it keeps raining all night, your chain is compromised. Options then are to carry a wet lube, and contaminate your drive train, or swap a waxed spare and hope that rain will eventually stop.

At this point, I don't know what's best.