Another idea. Since the N360 has such a wide range (the equivalent of a 9-32 cassette) it wouldn't be too much to swap chain rings for different environments. If I had, say, a 53 and a 45, that would give me the option to run the 53 normally and if the area I land in is hilly I could swap out for the 45 and drop my bottom gear inches around 25 to 21. It would require a change in the chain length, but with either a different chain or a short removable section (lighter weight that way) it would work.