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Your cart is empty.40-Series Zero Stack headsets set the standard for performance, durability and value. Drawing from the premium 110-Series design, the 40-Series includes all the features necessary for a durable, lightweight, long-lasting headset. Sealed ZN40 cartridge bearings. 6000 series alloy cups and materials. Steel crown race with integrated seals. Interlok spacer compatible. Item Specifications: Color: Black, Bearing Type: Cartridge, Crown Race: 30, Defined Color: Black, S.H.I.S Upper: ZS44, S.H.I.S. Stem Clamp Diameter: 28.6 Threadless, S.H.I.S Lower: ZS56,
Customer
Reviewed in the United States on October 5, 2024
This one did the job for my 2019 Trek Roscoe 8. Perfect fit, with smooth action.Got some new funky forks with a non-tapered head tube, so needed a headset that could accommodate tapper to non-tapper. The Roscoe has a ZS44 upper cup and a ZS56 lower cup. This headset has a reducer to fill the gap.This is a sealed bearing design, far superior to the factory cage bearings.Tried some other headsets and they didn't work out. This one did the trick.
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