Overseas customers, please select CRANK SHIPPING OVERSEAS as the shipping option IN THE CART. USE CODE SHIPFREEUSA to zero rate the shipping cost in the cart. Redline Flight BMX Cranks Description: The Redline Flight BMX cranks feature heat-treated 4130 chromoly arms with a dual pinch bolt design. The Redline Flight AL 2-pc Crank Kit features hollow forged 6066 aluminum arms with large cross section to maximize strength and stiffness. New “for sale” inventory is expected to deliver in November 2023. Redline Flight AL Race Cranks 170mm Black. Size: M8 X 1.0 X 20mm (because of the flat head, 20mm in this case is also the overall length of the bolt). Please refer to the measurements below to confirm if they fit other applications. The original tubular chromoly cranks, designed by Linn Kastan in the 1970’s 100 heat-treated tubular 4130 chromoly, dual pinch bolts. The set - including the Techmatic BB Bearing and cup set, is delivered in custom Redline by Kastan packaging. Redline Flight crank spindle bolts - these fit the newer versions of Flight chromoly cranks. The diameter of the bore hole reverts to that of the original to accept the Double Dimple Redline driver Spindle. We offer this only in 44 tooth at the present time. The Redline X Flight sprocket is manufactured in the United States utilizing super fine CNC engraving to recreate the logos and surface design. ![]() ![]() The crank set itself, including the spindle, requires 24 separate processes to produce and several specialist vendors. This bottom bracket will fit many popular cranks such as Profile, New Redline Flight 2 Cranks, and most any other 19mm crank. The crank arms are produced from Chromoly and swaged prior to press forming through three separate molds to achieve the iconic, tapered Redline Flight crank shape. This sealed-bearing bottom bracket allows you to use a 3-piece crank with a 19mm spindle (not included) in an American frame. Using the original Flight Crank 2D drawings (dated 1982), we recreated a series of molds in California to a high level of accuracy to deliver the beautiful tapered arm, decal dimple and iconic single pinch hardware. Using original drawings and specifications unearthed in the Kastan archives, the Redline by Kastan 401 Flight cranks set is manufactured in locations within Southern California and Baja, Mexico.
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