Grin Triple Bob | Downtube Battery Anchor Mount

The Grin Triple Bob is the proper way to mount a downtube battery. Water bottle eyelets were designed to hold a bottle, not a 4-5kg lithium pack — the Triple Bob is a CNC-machined aluminium rail that straddles your frame tube with wide contact points, giving your battery a rock-solid platform with none of the side-to-side wobble you get from a direct eyelet mount.

It suits Hailong-1, 21700 and Reention downtube battery cradles (the ones with 3 mounting slots — often sold as Shark, Jumbo Shark or Whale Shark cases). Mount it on your existing bottle bosses for a clean install, or use the machined hose clamp channels to anchor it anywhere on the down tube, top tube or seat tube — perfect for frames with awkward or missing eyelets. Includes M5 bolts, hose clamps and heat shrink. Designed and made in Canada by Grin Technologies.

Not sure if it fits your battery? Bring it into Grace and Pace in Alphington and we will sort you out — we can fit it while you wait.