Joined: Feb 2012
Posts: 19,381
Likes: 5,528
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
The name of this second drive chain (not a wrong reference) is not the real issue. The dimensional specs of it are. It is most likely a common 1/2" pitch by 1/8" wide one, often found of older coaster brake and 3 speed bikes. But just short in link count. Chains which fit gear systems with multiple cogs are usually thinner, 3/32" width is a common spec.
But know that trikes have been made by both bike companies and industrial ones. So components can reflect their biases and suppliers. One measurement is worth a thousand assumptions. Andy