The Sturmey Archer S-RF3 is a heavy-duty 3-speed freewheel internal hub that is high performance and low maintenance. The trim kit comes with all the parts, and includes an 18-tooth cog, and Sturmey Archer SLS30 thumb shifter, cable, and housing. See below for compatibility and specs.
This part will fit on:
Shift lever will fit on any standard city or mountain handlebar.