Joined: Feb 2012
Posts: 19,290
Likes: 5,382
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
That plastic tab in slot is a down tube impact damper and a key to keep the plastic threaded sleeve from rotating. Andy
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AndrewRStewart