The boat’s ISO structural category A and OSR category 1 ratings reflect its offshore-racing intent. In the mid-2010s, Bolt 37s took class and overall wins at Long Beach Race Week, Long Point Race Week, and the Newport to Ensenada Race.
Design and Construction
The hull, bulkheads, stiffeners, and deck are built in female tooling from E-glass and Core-cell M-Foam, with vinylester resin infused under vacuum assistance. The builder selected the Core-cell product as a superior core material, despite its costing roughly 40% more than conventional PVC foams. Together, these choices supported the goal of producing an accessible, easy-to-race design with enough weight consistency for one-design racing.
The keel comprises a cast-steel fin encased in CNC-moulded composite skins. It supports an antimony-lead alloy bulb cast in a CNC-milled plug and faired with templates, so it needs no additional fairing before racing. An internal alloy frame, bonded to the hull, links the keel’s static and dynamic loads with the hull and rig.
The low-freeboard hull is shaped to keep wetted surface area to a minimum. With an 11-meter LOA and a 3.48-meter beam, the Bolt 37 has the broad profile of a modern racer rather than that of a narrow thoroughbred. Draft is 2.80 meters.
Rig, Performance, and Handling
Jason Ker’s design pairs a Hall high-modulus carbon spar with Harken deck hardware and B&G electronics. The generous sail plan provides 81 square meters upwind and 193 square meters downwind.
In light air, the combination of minimal wetted surface and low freeboard allows the Bolt 37 to find impressive boatspeed while other boats are struggling to move. The hull’s strong form stability and sufficient righting moment help it use the sail plan’s power and reach planing speeds sooner than much of the competition.
Developed by KA Yachting, the Bolt 37 offers strong rated value under both ORCi and IRC handicaps. That is central to its appeal as a club racer suited to one-design competition. Auxiliary power comes from a single 22 hp Yanmar diesel.
Accommodations
This is a pure race boat, fitted with the features expected of a modern racer. The sources record no cruising interior, berth count, or galley arrangement. It was built around racing and one-design weight consistency rather than liveaboard comfort, so prospective buyers should regard it primarily as a weekend and offshore racer.
Construction and Ownership Considerations
The available material identifies no specific recurring faults. It describes a vacuum-infused composite racer with a keel that needs no post-mould fairing and an internal bonded frame that distributes keel and rig loads.
Ownership centers on race preparation rather than cruising refits. The Hall carbon spar, Harken hardware, and B&G systems are modern and supported, while the finished keel bulb arrives race-ready from the mould. The design weight was held consistent enough for one-design standards, suggesting that class-controlled upkeep matters more than bespoke modification.
The Verdict
The Bolt 37 is a focused production racer that punches above its price through thoughtful composite engineering, strong handicap value, and a hull that planes early. It isn’t a cruiser; its value is realized on the racecourse under handicap rules rather than at anchor.
Pros
- Minimal wetted surface and low freeboard support light-air speed and early planing
- Vacuum-infused E-glass construction with a premium Core-cell foam core and bonded alloy frame
- Race-ready keel bulb requires no additional fairing
- Strong rated value under IRC and ORCi
- Competitive record in offshore and around-the-buoys racing
Cons
- Pure race boat with no documented cruising accommodations
- 2.80-meter draft limits access to shallow water
- Auxiliary power is limited to a single 22 hp Yanmar diesel
