Xtracycle has made a name for itself in the cargo bike space, but if the cargo space on the bikes isn’t enough the company now is looking to add a bit more with a sidecar attachment. This add-on mounts using the horizontal dropouts, and can hold up to 200 pounds on a 24-inch by 30-inch platform. In other words if you have some extra that you need to carry, Xtracycles probably can make it happen.