Grip Shifter for Rohloff

thingiverse

Early Prototype Warning: not yet tested, possibly won't work at all. This is a shifter for a Rohloff SpeedHub 500/14, intended to be one someday soon. For now, it's very much a work in progress still. The Rohloff SpeedHub is a 14-speed internally-geared rear hub designed for bicycles. It comes with a high-quality shifter, but that shifter only fits straight bars (22.2mm diameter). There are solutions available for road bars (23.8mm), but most seem unsatisfying and/or expensive. One of the great features of the Rohloff SpeedHub is its indexed internal design, located inside the hub. This allows the shifter to be a simple pulley mechanism, rigged so cables turn a wheel near the hub. This design was executed in OpenSCAD, fully parametric, allowing you to scale it to any bar size and adjust other parameters as needed. I speculate that this will ultimately work best with Nylon (lower friction), but PETG, ABS or ASA might also be suitable options. # Installation Instructions Still working on perfecting these... Additional Materials Needed: 1. 1 M4 nut 2. 1 M4x8 bolt Directions to Follow: 0. Remove supports from the stator and ferrule ports. 1. Insert the nut into the nut slot on the stator. 2. Thread the bolt into the nut, securing it with a hex head on the outside. 3. Place the hexagonal clamp into the hole inside the stator, flush with the stator wall. 4. Attach the stator to the handlebar (does it successfully navigate drop bar curves?). 5. Screw down the bolt, compressing the hexagonal clamp to secure it to the bar. 6. Install cables (TODO: details).