Ok, I've agreed to do a 75 mile ride this weekend and I'd like to do it on my new fixie. Any hints to make the distance on a fixed? I did a century and a 200k last year on a geared bike, but haven't done much long distance stuff this year(lots of short rides 20-30 miles though). I'm going to get off the bike at the rest stops to rest the knees/legs. The ride has some rolling hills and no real long climbs, so it should be doable.