Joined: Feb 2012
Posts: 19,353
Likes: 5,471
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
Data point- Sachs changed their freewheel cog thicknesses from 2mm to 1.8mm (and thickened the spacers to retain the same 5mm cog to cog dimension) back at some time in the mid 1990s. Made for smoother chain run engaging their teeth. Also made for faster cog wear. Andy