This will be my first tour, roughly 350 miles in 5 days. Not terrible, but there are the hills, headwind, and the bike I have is a singlespeed with a 42 chainring, and a 19 cog. Easily upgradable to a 7 speed, but would like to keep it simple. Anyone familiar with the terrain? I've climbed brutal hills with that gear, but never with gear. I'm not oblivious to the fact that it will be difficult, but if it's actually impossible, please speak up. Thanx.