This SRAM handlebar mounted shift lever can be used in combination with a 7-speed motor with optional rear wheel derailleur. Bicycles which usually have a hub gear and still want to use a motor in the rear wheel then this is the solution
This item can immediately. are bike gemonteer ; the wheel of   and works in combination with Shimano 7 -speed Tourney derailleur. (Is incl. Delivery of cable).