We've had a tandem mountain bike for several years now but have only used it to crusie our own neighborhood. Well, we think it's time to start riding beach side and to begin using all the wonderful bike trails Florida has to offer. I've visited thuleracks.com but haven't a clue what I "need". Is anyone familiar with what we actually need to strap it to the roof and hit the highway. Is our wagon to small to even transport a tandem? Ideally, wifey and I would like to strap the tandem and our surfboards on the roof.