Chris King InSet 7 Red ZS ZS44 EC44 40 Standard Compatible Headset (Zero Stack) Upper / 28.6 Lower / 1-1/8" > 1.5"

InSet 7 Red ZS (Zero Stack) Upper: ZS44 / 28.6 Lower: EC44 / 40 Compatible with 1-1/8" ＞ 1.5" standards Headset Compatible with ZS (Zero Stack) standards Headset InSet is compatible with Zero Stack (ZS) and Zero Stack (ZS) & External Cup (EC) mix specifications. Equipped with the patented CHRIS KING GripLock system. GripLock system enabled proper steering column retention and bearing preload. By applying appropriate preload to the bearings, smooth rotation is always provided in response to shocks transmitted through the front fork and steering column, as well as forces in the front, back, left, and right directions. Give it some love (i.e. cleaning and greasing) on a regular basis. ChrisKing bearings are easy to maintain and will continue to rotate at their best for an incredibly long time. Features Integrated production at our own factory in Portland, USA In-house sealed bearings boasting extremely high durability and smooth rotation High performance even under harsh conditions Adopts a unique GripLock system to maintain specifications Compatible headset standards (S.H.I.S notation): Upper: ZS44 / 28.6 Lower: EC44 / 40 Compatible fork column size: 1-1/8" ＞ 1.5"