Original DIF forging marks for authenticity and quality assurance
28° rake angle for precise fit with stock diameter tubing
Drilled neck for 7/8 inch lower horizontal tube compatibility
Four-stage forged process enhances strength and wear resistance
Machined and heat-treated for durability and longevity
Summarized by Shop
Replica 1936-1940 knuckle head frame neck forging has a 28° rake and is machined to accept stock diameter tubing. Features original DIF forging marks on the left side of the neck. Neck is drilled for a 7/8" lower horizontal tube.
Forged neck is accomplished in 4 stages: First the steel is fired as red hot ingot, next huge hammers compact