The Grin Triple Bob rail offers a super - convenient and rock - solid way to attach Hailong - 1, 21700, and Reention case Downtube batteries to any spot on your bicycle frame tubing, no matter where the eyelets are. Crafted from solid aluminum using CNC machining, it gives a wide and flat base for the battery cradle. Secured with three M5 bolts, it eliminates the annoying rocking or play sometimes found with waterbottle eyelets. The machined channels can hold up to 4 hose clamps to keep the battery firmly in place, and it comes with heat shrink for the hose clamps. Proudly designed and made in Canada by Grin Tech.

Using the Grin Triple Bob is easy. First, find the right spot on your bike frame tubing to attach the rail. Make sure the area is clean. Then, place the battery cradle on the wide and flat platform of the rail and secure it with the three M5 bolts. Next, use the machined channels to put on up to 4 hose clamps around the battery to keep it tightly in position. Don't forget to use the included heat shrink for the hose clamps. As for maintenance, regularly check the bolts to make sure they are tight. Keep the rail clean by wiping it with a dry cloth. Avoid using harsh chemicals that could damage the aluminum. When not in use, store it in a dry place to prevent rusting.