40 Zero Stack Headset (ZS44/EC49) Vendor_Thule they instantly harden to dissipate

they instantly harden to dissipate the force of the crash

Dual-pull design simplifies setup by working with top or bottom routed shift cables

Balloon tire with urban treads

And with all needed parts included

and real quality bike parts that are safer and longer lasting that anything you'll find in the toy store

40 Zero Stack Headset (ZS44/EC49) Vendor_Thule they instantly harden to dissipate40 Series Zero Stack headsets set the standard for performance, durability and value. Drawing from the premium 110 Series design, the 40 Series includes all the features necessary for a durable, lightweight, long lasting headset. FEATURES: Sealed ZN40 cartridge bearings 6000 series alloy cups and materials Steel crown race with integrated seals Interlok spacer compatible Compatible with tapered 1 1 8" to 1 1 2" steerer tubes, or straight 1 1 8"