Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,185
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
I suspect those levers were never intended to be compatible with a hub brake. IIRC the locking pin/parking brake design came out of the freestyle world where rim brakes were the standard. So the amount of cable pull they have is intended for the long arm calipers that the 20" bike typically has.
Have you tried to use another method of holding the lever enough to lock your wheels? I've seen toe clip or velcro straps used for this. Andy
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AndrewRStewart