Don't throw out all your old SD50 electric wiring system, simply use this adaptor where needed to connect the newer SD300 wires with the older SD50 wires. Shimano's commitment to customisation and flexibility means that you don't have to worry about sacrificing your current system to get that new SD300 compatible accessory. Simply convert the wiring where necessary using this Shimano SD300/SD50 Electric Wire Conversion Adaptor.
Thanks! We will notify you when this product becomes available!