Description
The RHAAS Kawasaki 440 & 550 Five5Zero Rear Sponson, developed through a partnership between RocketShip and RHAAS Products, represents a major leap forward in vintage Kawasaki stand-up handling technology. These sponsons use a carefully engineered flexible material that performs dramatically better than traditional rigid sponson designs, delivering measurably more speed, more precise turning response, and superior control authority in all water conditions. The engineering is deceptively simple – same size, same appearance, same bolt-on installation – but the performance difference is immediately noticeable. These sponsons have been tested extensively by experienced riders and proven to deliver real-world performance advantages on the water.
- Developed through RocketShip and RHAAS partnership
- Advanced flexible material outperforms rigid sponson designs
- Measurably faster through water with reduced drag
- Delivers superior turning response and control precision
- Maintains OEM size and appearance for authentic look
- Direct bolt-on installation – no modification required
- Extensively tested by experienced stand-up riders
- Works on 440-550 models and many other stand-up platforms
Rear sponson selection is one of the most impactful choices in vintage Kawasaki stand-up handling, and the Five5Zero sponson from RHAAS and RocketShip represents the cutting edge of this technology. The flexible material design allows the sponson to work with water flow rather than fighting against it, resulting in faster acceleration, more responsive turning, and better overall control feel. Riders consistently report that upgrading to these sponsons transforms how their machine handles and responds to input. Whether you are building a competitive race machine or simply want the best possible handling from your cherished stand-up, these sponsons are absolutely worth the investment.
