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7075 T-6 aluminum cups machined in Fletcher, NC
Interlok spacer compatible
Sealed black oxide bearings
Steel dual steel crown race with integrated seals
Compatible with tapered 1-1/8" to 1-1/2" steerer tubes
Eccentrically machined ZeroStack bearing cups designed to create a steeper or slacker head angle and are independent of headtube length Available as a +/ 1.0 degree headset or as a kit that includes additional cups for +/ 0.5, 1.0 and 1.5 degree adjustability (install on frame centerline axis and rotate 180-degree to change angle) CNC machined from U.S. materials in Cane Creek's Fletcher, NC facility Contoured and relieved 7075-T6 aluminum for minimized weight and maximized strength, with self-aligning black oxide steel bearing design for durability ZS49-TR49/40 fits: 1.5" headtube with a 1.5>1-1/8" tapered steerer ZS49-ZS49/30 fits: 1.5" headtube with an 1-1/8" straight steerer ZS44-ZS49/30 fits: traditional tapered headtube with an 1-1/8" straight steerer ZS44-ZS56/30 fits:ZS tapered headtube with an 1-1/8" straight steerer ZS44-EC49/30/40 fits: ZS tapered or straight steerer (includes both races) model: ZS44-ZS56/40 (kit) steerer: 1-1/8" headtube ID (top/bottom): 44.0/55.9mm offset angle +/-: 0.5/1.0/1.5 deg crown race: 39.8mm stack: 13mm weight: 131g