Aheadset was spawned with one goal in mind; minimize the number of unique parts in order to maximize interchangeability among headset configurations. To accomplish this, Aheadset created a certain commonality amongst parts, making the Aheadset system adaptable to a number of unique headset configurations. From traditional models to ZeroStack for threaded or threadless 1" or 1 1/8" models, the Aheadset system features 21 unique parts that enable 11 unique headset arrangements to solve almost all fitting issues.
AheadSet Universal Preload/Top-Cap Bolt
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP"), which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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This part (also known as a star-fangled nut)
is used to set the preload adjustment on threadless headsets, in tandem with a top cap (not included). Proper installation requires the use of a star nut setter, a separately sold tool. ...
FSA Compressor 1" Black Expander Plug FSA Compression
Plugs are top assemblies for carbon steerers. Replaces the traditional top cap assembly. Includes cap, bolt, and expander. For 1" threadless forks only (will NOT work with 1 1/8" forks)
Ultegra FC6600/6603 Crank Arm Fixing Bolt. Also works
for the Shimano R600 crank. 1 per crankset, fits FC-6600/3 FC-5600/03 and FC-R700. "B" fit for FC-M600, FC-M580, FC-R600, FC-4500, FC-4550 Shimano # Y1G311000