KNUCKLEHEAD

VG Classic Frames manufactures Knucklehead frame replicas for every production year from 1936 through 1947 – from the first-year straightleg to the post-war wishbone. Every Knucklehead frame replica is built in-house at our workshop in Hengelo, the Netherlands, where the original VG frames were developed. We are the manufacturer – not a dealer, not a distributor. That means every frame leaves our workshop to the same specification we designed it to, with full traceability and direct technical support from the people who built it.

Our Knucklehead frame range covers three distinct generations. The 1936 and 1937 straightleg frames reproduce the earliest production specifications, when the overhead-valve Knucklehead was still finding its feet. The 1938-1940 frames represent the most mature pre-war straightleg engineering – proven geometry, consistent tolerances, and the full benefit of three production cycles behind them. From 1941 onward, Harley-Davidson introduced the wishbone lower tubes, creating the silhouette that would define the Big Twin for the decade ahead. Our 1941-1945, 1946 bullneck, and 1947 wishbone frames each reproduce the correct specification for their production year – including the neck angle changes that distinguish one year from the next.

Every Knucklehead frame replica is delivered bare with a certificate. All cast components carry the original casting numbers as used by Harley-Davidson in period production.

If you are sourcing individual components alongside your frame, our Knucklehead castings, frame tubing, machinery and sheet metal parts are manufactured to the same specification and available separately.