Wolf Tooth GeoShift Performance Angle Headset ZS44/28.6 Upper, EC49/40 Lower/Long 115-140 mm

CompatibilityUpper headsets ship with a star nut which can only be used on forks with steel or aluminum steerer tubes. For forks with carbon steerer tubes you will need a compression plug (sold separately; never use a star nut on a carbon steerer tube)Consult measurement guide determine which headset will fit your bike.Upper assembly features:Ultralight Stem Cap With Integrated Spacer plus an aluminum bolt and a star nut5mm top cover = 6mm total stackO-ring seal prevents water intrusion around the steerer tubeCustom-molded upper lip seal provides additional protection for upper bearingOptional shim washers if neededLower assembly features:Custom-molded dual-lip seal on the crown race to protect lower bearing in the toughest weather and trail conditionsService and additional parts availableRecommendationsThe Wolf Tooth crown race installation adapter will help avoid damaging the crown race seals.Tech SpecsWeight: ZS44/28.6 Upper, ZS56/40 Lower • 92g | ZS44/28.6 Upper, EC44/40 Lower • 105g | ZS44/28.6 Upper, EC49/40 Lower • 107gMaterial: 6061 aluminumIncludes: Upper and lower cups, bearings, crown race, star nut, three shims, stem cap with 5mm integrated spacer and bolt (weight listed does not include star nut, shims, or stem cap)Made in the USA