We have one on our Eagle and it's 250 lbs. maximum on the rear slide storage tray. Jayco also calls it a bike rack. Yes, it's made to travel in the out position and we love ours.
2012 Eagle 320 RLDS
2012 Ford F-250 Crew Cab FX4, 6.7l PSD
3.55 E-locker, Timbrens