The ideal spare part if you want to use the Bobike Go® maxi frame mount on two different bicycles. Ideal for commuting.  

It features a safety holder with green indicators that will pop up providing a visual signal of correct installation. Fits frames from Ø28 to 40 mm. Requires 105mm mounting space on the seat tube to be installed. Fits round tubes, and was designed to accommodate the brake cable, preventing it from being pinched. Inside, a rubber pad will also prevent the frame from getting damaged. Tools included.