Hi guys. Up north at the cabin. Put on
the Marathons that came a few days before we went north. Always do the two side ones first as they are easiest. I left the shift cable attached to rear Nexus, one less step. Dropped chain off front sprocket to slide wheel off the back. Thought I put everything back on correctly. This pm's ride was on a gravel path. Almost back after 6 miles and chain dropped off in back, to the inside. Twice more and I gave up and walked Trike back. Twice more at cabin and I quit. Drove til I got a signal to pose this. Want to ride tomorrow. Can u help. Please. Those nuts in the drop out slot, does the tab face forward or back? I thought tubes may have turned inside causing this. ??