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Cube's #17 semi-integrated headset (ZS44/28.6 - ZS56/40) with Block-Lock steering stop protection for 1 1/2’ tapered fork steerer tube. In addition, there is a reduction cone for a 1 1/8’ fork steerer.
Top bearing :
Bottom bearing :
For forks with 1"1/8-1.5" or 1"1/8 steerer
Brand: Cube/Acros
Model: 8017
SHIS Number: ZS44/28.6 - ZS56/40 or ZS56/30
BlockLock 135° upper cup