Eight.3 is Ronix’s ballast division — named because a gallon of water weighs about 8.3 pounds. The bags are built from heavy PVC with a trapezoid “anti-roll” shape so they sit in a locker instead of wandering around the boat mid-set. Plug N Play kits hook into factory ballast systems on boats like Malibu and Axis; Boost bags are the small add-ons.

Welcome Board Store stocks Eight.3 boat ballast, shipped from Mornington next to the rest of the wake shed.

In stock

• 2025 Plug N Play Malibu / Axis Ballast MA80 400 lbs — a 400 lb bag cut for Malibu/Axis lockers on the MA80 fitment.
• 2025 Plug N Play Malibu Ballast Std Kit MA140 400 lbs — the MA140 standard-kit 400 lb bag for Malibu.
• Telescope Trapezoid Ballast — Eight.3’s telescoping trapezoid bag, the fast-fill shape Ronix built to sit still once it is full.
• Boost Ballast Bag 25 lbs and 50 lbs — small add-on bags when you only need a bit more weight, not a full locker sack.

Heavier boat, better wake. Shop Eight.3 at Welcome Board Store.