If you were to tow a BOB trailer with ~50 lbs. every day, what kind of bike would you use? I come from a road background, so the cheapest and easiest thing to me seems to be to get a mid-level aluminum road bike. In terms of handling the added stress from the trailer, is there a reason to prefer steel over aluminum? In all other aspects I'd prefer aluminum, but I don't have much experience with a trailer. What about brakes? I've ridden with a maximum load of ~30 pounds (a combination of a full rear rack and a backpack) on caliper brakes, cantilever brakes, and V-brakes. V-brakes seemed the best, but I never felt unsafe with caliper brakes. Does the bike brake differently with a trailer? I live in a pretty flat area, so I have a feeling caliper brakes would be fine, but I'm willing to change my mind. I wouldn't plan on using this bike in the winter, so my main concern is being able to tow the trailer with as little of a speed penalty as possible, yet making sure that the bike is durable enough to handle the extra stress.