Semi-integrated headset (zs) for frames with 56mm head tube at the top and integrated cable routing (icr). Can only be used in combination with a matching headset cover ( zs56 headset cover ) for integrated cable routing. The headset upper part includes a zs56 bearing shell, a matching angular contact ball bearing, a special centering ring for cable routing and our ips seal as additional protection of the headset bearing against moisture and dirt.
 
double-sealed angular contact ball bearings
Centering ring made of glass fiber reinforced plastic 
metal-reinforced sealing disc