RotoPaX® 1.75 Gallon Pack Mount Extension

The RotoPaX® 1.75 Gallon Extension is designed specifically for stacking any RotoPaX® fuel container on top of an existing mounted 1.75-gallon pack. Whether you’re expanding your setup with a fuel, water, or storage pack, this extension threads into any RotoPaX® Pack Mount—including the Standard, DLX, or LOX—and locks your second container securely in place.

If you’re stacking a 1.75-gallon container on top of a 1-, 2-, or 4-gallon RotoPaX®, use the Standard Extension instead. The difference is subtle but important for fitment and proper thread engagement.

How It Works

You’ll need a base mount installed—this extension does not replace a mount, it adds to one. Thread the 1.75 Gallon Extension into your Pack Mount and install any RotoPaX® container on top of your 1.75-gallon base. It locks in tight, keeping both containers from shifting even on the roughest trails.

Why We Love This

Space is always at a premium in an overland rig. This extension lets us double our container capacity without adding clutter or extra mounting hardware. It’s strong, simple, and does exactly what it should.

Features & Benefits:

• Stack & Secure – Designed to stack any RotoPaX® container on top of a 1.75-gallon pack

• Use With Any Mount – Works with all RotoPaX® Pack Mounts (Standard, DLX, LOX)

• Compact & Effective – Expands your storage without adding to your footprint

• Built to Last – Made in the USA from tough, corrosion-resistant materials

• Know Your Setup – For stacking a 1.75 on top of a 1-, 2-, or 4-gallon container, use the Standard Extension