Pontoons
MB Sports B52 21 Alpha Boats for Sale
The MB Sports B52 21 Alpha represents the newest generation of MB’s proven 21-foot towboat design. Built on the Alpha hull platform, this model combines MB’s signature craftsmanship with modern surf and wake technology. The B52 21 Alpha delivers powerful performance through Indmar Raptor power and advanced surf shaping, while maintaining the clean, hand-built character that defines MB Sports. Compact and versatile, it offers the perfect balance of size, performance, and quality for riders who want a surf-first boat that still produces strong wakeboard wakes.
The MB Sports B52 21 Alpha continues a legacy that began more than two decades ago with the original B52 21. When MB Sports introduced the Alpha series, it marked a major evolution in both design and technology for the company. The Alpha platform brought an all-new hull, deck, and interior layout that replaced the long-running Classic series, introducing higher freeboard, more storage, and a modernized surf system. The B52 21 Alpha carries forward the core strengths of MB’s earlier 21-foot models while adding advanced features that appeal to today’s surf riders.
One of the key differences in the Alpha design is the hull itself. It features MB’s latest surf-focused running surface, engineered to create longer and more powerful surf waves with improved balance and shaping flexibility. The boat retains the responsive handling that made the B52 21 popular but now benefits from greater ballast capacity and refined weight distribution. MB moved away from the older gravity-fed ballast approach, introducing a fast-fill ballast system that uses valves to flood and drain tanks in seconds. Combined with MB’s Surf System, the Alpha offers precise control over wave length, height, and push on either side.
Power for the B52 21 Alpha comes from Indmar’s Raptor series engines, most commonly the Raptor 400 or 440. These engines provide exceptional low-end torque for towing riders and effortless planing, even when the boat is fully loaded with ballast. The drivetrain is proven and reliable, continuing MB’s tradition of using top-tier components that emphasize performance and durability.
Inside, the Alpha series brings one of the most refined interiors ever offered by MB Sports. The 21 Alpha features deep seating, premium materials, and an ergonomic layout designed for comfort and functionality. MB’s hand-built construction process remains central to production, with each boat built in Merced, California, using high-quality gelcoat finishes and fiberglass craftsmanship that has defined the brand for years.
As a surf-first boat, the B52 21 Alpha offers exceptional wave quality in a compact footprint that still fits in standard garages and is easy to trailer. For riders who want the build quality and performance of a larger surf boat in a smaller, easier-to-handle package, the B52 21 Alpha stands out as one of the best-balanced models in MB’s lineup.