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AER Series II

Light As AER

Long recognized as the world’s lightest headset, the AER series offers a hybrid steel and aluminum bearing that provides even greater durability and a 35% weight savings over comparable models. Strategic machining and precision contours provide an optimal balance between weight savings and strength. The AER headset is an ideal headset choice for road and mountain bike applications- a high quality durable headset with durability and lightweight performance in mind.

AER series headsets are available at select retailers

Technical Specifications

Additional information

Cups and Covers

7075 T-6 Aluminum, contoured and relieved to minimize weight and maximize strength

Crown Race

Aluminum crown race with integrated low-friction seal


Lightweight aluminum/ steel hybrid cartridge bearing

ZS44 will take a 41mm bearing
EC44/40 will take a 52mm bearing
EC44/33 will take a 47mm bearing
ZS56 will take a 52mm bearing
IS41 will take a 41mm bearing
IS42 will take a 42mm bearing
IS47/33 will take a 47mm bearing
IS52 will take a 52mm bearing

All complete Cane Creek AER series headset assemblies (top or bottom) will use a 36×45 degree contact angle bearing, with the exception of our IS47/33 and EC44/33 headset assemblies. IS47/33 and EC44/33 will use a 45×45 degree contact angle bearing.

Complete Assembly Weights

IS41 Tall Cover (H15) Top BAA0956K – 40.6 grams
IS41 Short Cover (H9) Top BAA0957K – 39.2 grams
IS42 Tall Cover (H15) Top BAA2958K – 40.8 grams
IS42 Short Cover (H9) Top BAA0959K – 39.4 grams
ZS44 Tall Cover (H15) Top BAA0962K – 52.4 grams
ZS44 Short Cover (H8) Top BAA0961K – 49.8 grams
EC44 Bottom BAA1029K – 39.6 grams
ZS56 Bottom BAA1030K – 39.4 grams
IS52 Bottom BAA1044 – 28 grams

Bearing Weights

41mm Bearing BAA0925A – 12.8 grams
42mm Bearing BAA0926A – 13 grams
47mm Bearing BAA0930A – 17.8 grams
52mm Bearing BAA0927A – 22 grams

Stack Heights

ZeroStack (ZS) — 8mm or 15mm top, 4mm bottom, Integrated (IS) — 9mm or 15mm top, 1mm bottom

Compression Ring

Cup-in compression ring

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Reed Mann

Design Engineer
Name: Reed Mann
Position: Design Engineer
Year started: 2022
Best part of being a part of the Cane Creek family:  It’s very refreshing to work for a small, tight-knit company where we all share the same passions and to develop new products that make cycling better for everyone.
What you’ll find me doing on the weekends: Obviously riding bikes, but also wrenching on bikes or cars, exploring the mountains, and watching F1 races.
How I got here (at Cane Creek): Feeling pretty unfulfilled with a corporate engineering job, I happened to see that Cane Creek was hiring. I jumped at the opportunity to get my hands dirty working on the latest bike tech and was fortunate enough to be offered the position.