The Topeak Bottle Cage Extension – Tri Backup Pro V and I is a smart accessory that adds extra hydration capacity to your bike rack setup. Designed to integrate seamlessly with both Tri Backup Pro V and Tri Backup Pro I rack systems, this extension lets you securely mount an additional bottle cage.

Crafted from durable, lightweight materials, the extension bracket provides a stable platform for your bottle cage without compromising the strength or balance of your rack. Installation is quick and tool-free, letting you add hydration capacity in seconds. Whether you’re carrying extra fluids on hot days, multi-day trips, or remote routes, this practical extender keeps your water within easy reach.