When properly rigged in an inverted speargun, a pair of Bi-Pulleys allows for mounting 4 rubber bands. Each Bi-Pulley can withstand up to 300kg of force while carbon fiber keeps weight down, making it an astounding 40% lighter than its competitors. The reduced weight in rigging translates to significantly more power being transferred to the spear, giving you a distinct advantage during your dives.

The Delrin with 30 percent glass fiber rollers further enhances the Bi-Pulley’s resilience, ensuring they resist the wear caused by Dyneema rigging, preventing flat spots that commonly occur in the plastic rollers of regular pulleys. The inclusion of sliding bearings on the inside ensures smooth movement, minimizing friction and allowing better energy transfer