Cycling season is never over. Check out the Winter Training Collection.
Shimano's TL-EW02 Cable Plug Tool is one of those tools that you only use when building or maintaining your bike. It allows you to securely and properly connect and disconnect EW-SD50 electric wires, connecting your Di2 components. Plugging in Di2 connectors correctly requires more force than you'd expect and a loose connector can cause all kinds if weird issues if you're unlucky.
