The Grin Double Bob rail offers a super - convenient and secure way to attach a Hailong - 03 Downtube battery to any spot on your bicycle frame tubing, no matter where the eyelets are. These parts are precision CNC machined from solid aluminum. They present a wide and flat surface for the battery cradle, eliminating the annoying rocking or play sometimes seen with waterbottle eyelets. The machined channels can hold up to 3 hose clamps, keeping the battery firmly in place. Proudly designed and made in Canada by Grin Tech.

Using your Grin Double Bob rail is easy. First, find the right spot on your bike frame tubing to attach the battery. Place the Double Bob rail there. Then, put the Hailong - 03 Downtube battery on the wide and flat platform of the rail. Use up to 3 hose clamps in the machined channels to secure the battery tightly. When it comes to maintenance, keep the rail clean. Wipe it down regularly to prevent dirt and debris from building up. Avoid using harsh chemicals that could damage the aluminum. If you notice any signs of wear or looseness, check the hose clamps and tighten them if needed. This will help keep your battery attachment safe and reliable.