[Tom Ore]

We used these Mecanum's this year. They do look a lot sturdier, but the bolts and rather small and can bend easily. Our Breakaway robot had a similar drive, but without the moveable wheels. We used 4 Mecanums on the inside and 4 traction wheels on the outside, raised slightly. This allowed us to cross the bump easily - the traction wheels were geared down and pulled us over the bump. We could cross the bump easily at full robot speed but when the robot came down on the other side of the bump, the bounce would bend the small Mecanum wheel bolts. The electronics guys didn't like us crossing the bump that fast anyway...