New builder for Viper 640 Class

Published on April 11th, 2026

The Viper 640 Class has appointed SERO Sailing as the new official class builder for the popular high-performance one-design class. SERO Sailing is a sailboat design and manufacturing company based in Marine City, MI.

The Viper 640 was originally built by Viper Boats starting in 1996, with Rondar Raceboats (Wiltshire, England) appointed as the official builder in 2005 but is not continuing as the official class builder going forward.

“During our site visit we were impressed with the professional production facility and strong customer support team,” said Steve Chapman, Chair of the Viper 640 Class Association. “Having a builder closely connected to the North American fleet will help keep the class strong, accessible, and growing.”

The Viper 640 is a 3 or 4 person sporty keelboat designed to be fast and fun, and gained international World Sailing status in November 2016. This status permits hosting a World Championship, with the most recent event in 2023 being held in New Orleans, LA.

“I have a great deal of respect for what the Viper 640 class has built,” noted SERO Sailing CEO Chris McLellan. “It’s an exceptional boat and an even stronger community. Our team is honored to take on the role of builder and is committed to delivering high-quality boats, reliable supply, and a long-term partnership with the class.”

SERO Sailing plans to begin production in June, working closely with the class to maintain strict one-design standards while delivering the quality and performance that Viper sailors demand. SERO intends to campaign its initial production boat at events this coming summer.

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