Semi-integrated headset (zs) for frames with 66mm head tube at the bottom. In our zs66-headset-bottom-part, the combination of angular contact ball bearings and well thought-out sealings ensure durability with minimum maintenance and therefore more worry-free time in the saddle. Available in two versions: for forks with 1.8" fork steerer (46mm) or 1.5" fork steerer (40mm).
Acros zs66 headset lower part, 44.02.710 1.5
Acros zs66 headset lower part, 44.02.700 1.8
 
 
A headset is one of those essential and unrecognized components of your bike. And it’s also much more complex than you would think at first glance. Because our engineers spend years tinkering on our zs66 headset, you can simply install it, forget about it and enjoy a worry-free time on the bike. We achieve this through our very own angular contact bearings. Which feature two double lip seals and our optimized headset grease to protect the bearings and ensure that moisture and dirt are kept outside. That way we offer you a product that’s supposed to last, no matter what your adventure throws at you.
 
double-sealed angular contact bearings
fork crown race with cured-on seal
ips - internal protection sealing  
 
There’s one simple rule when it comes to maximising the lifespan of a headset: the better it is sealed the longer it will last. That’s why our zs66 lower part comes with additional well thought-out sealing at the crown race. This prevents water and dirt from even making its way to the bearing, ensuring durability with minimal maintenance effort - so that you can maximize your good time in the saddle.