The Grin Triple Bob rail is an excellent solution for securely attaching Hailong - 1, 21700, and Reention case Downtube batteries to any spot on your bicycle frame tubing, no matter where the eyelets are. CNC - machined from solid aluminum, it offers a wide and flat surface for the battery cradle. Secured with three M5 bolts, it eliminates the rocking or play often found with waterbottle eyelets. Note: This product does not include fasteners. Designed and made in Canada by Grin Tech.

Using the Grin Triple Bob rail is easy. First, find the right spot on your bicycle frame tubing to place the rail. Then, put the battery cradle on the wide and flat platform of the rail. Secure it with three M5 bolts (not included with the product). When using, make sure the bolts are tightened properly to avoid any movement. For maintenance, regularly check the bolts for tightness and clean the rail with a dry cloth to keep it in good condition. Do not use harsh chemicals as they may damage the aluminum surface.