Its important to mount the elevator on a solid flat surface, not to bridge from one hole to another or one side bolted firm and the other on a flexible area, please also watch the fitting video, if you are unsure about fitting whats app +44 3333355214 The BTA Elevator is designed to give you more control over your between-the-arms hydration setup. Whether you want your bottle higher, lower, or tilted for easier access, the Elevator creates the flexibility to dial in your perfect position. Built with standard bottle cage spacing, it integrates seamlessly with almost any bottle cage and aerobar mount. Installation is straightforward — the base bolts align directly with standard bottle bosses. TriRig BTA Elevator Dimensions Bottle cage mount spacing: 63 mm Top platform width: 63 mm Tilt adjustment range: +25° to -25° Minimum stack height: 100 mm Maximum stack height (single rear bolt): 157 mm Maximum stack height (two rear bolts): 141 mm Maximum adjustable range: 57 mm (100 mm → 157 mm)