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With the semi-integrated ZS-55 headset part ZS55/40 from Acros, tapered forks can be installed in frames with a press-fit dimension of 55mm. Zerostack (ZS) designs are extremely popular, as they combine the advantages of low overall height and bearing shells.
Product features - Acros ZS55/40 bearing cup + AC4052R2 45/45° ball bearing
Model: Headset part ZS-55 ZS55/40
Type: Semi-integrated (ZS)
Steerer tube: 1 1/2"
Bearing: Industrial angular contact ball bearing AC4052R2
Seal: R3 (sheet metal supported rubber seal)
Bearing:
1 1/2" bearing shell - ZS55
1 1/2" angular contact ball bearing, double sealed - 45/45° 52x40x7mm
Press-in dimension Ø: 55mm
Offset: 10mm
Outer diameter: 61mm
Overall height: 2mm
Inner diameter: 40mm
Material
Bearing: Stainless steel
Bearing shell: Aluminum
Color
black
Weight
approx. 44g
