In the old days, everything had rain gutters. Then automotive designers decided to be aerodynamic, and raingutters became a rarity. Still, some big trucks and workvans still sport them, and they make for an elegant solution. A raingutter rack is strong and simple.
Yakima has been making the venerable 1A Tower for eons. For most of us long-time users, it was our first rack experience that wasn't 2x4s, patio carpeting and carriage bolts. Simple and strong, the 1A can also come in a super-tall versions for full-size vans where the gutters are mounted low on the car. See? They thought of everything.