The Electric MADSEN is a game-changer. We can't tell you how many customers have used those exact words! People are LOVING the boost, and are using their bikes even more. The e-assist can be purchased as a "kit" for all older MADSEN models. And, of course, can also be purchased on a bike brand new (we install the kit in our shop, so it's ready to zoom right when you receive it!). Join the movement of E-MADSEN riders! And those hills with a gaggle of kids in the bucket will be a breeze.