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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.


Light As AER

save the weight

Featuring 7000 series T-6 Aluminum cups and covers, an aluminum crown race with low friction seal, and a lightweight aluminum / steel hybrid cartidge bearing.

Strategic machining and precision contours provide an optimal balance between weight and strength, resulting in a high quality durable headset at the lightest weight possible.

AER headset bearings

AER Lightweight Bearing

For riders with an eye on weight, this hybrid aluminum /steel bearing maintains the quality and durability our bearings are known for, in a blue anodized sealed cartridge that is 35% lighter.

spacers for a headset for bicycles

AER Interlok® Spacer Compatible

Take it the next level of weight savings with our AER series Interlok® spacers. Our patented Interlok spacer design provides solid interface between the top cover and spacer stack, meaning they “nest” together and into the top of the bearing cover, which helps minimize shifting under load while riding. Spacers sold separately

Cane Creek Headsets

A legacy of innovation

In 1992, we brought the Aheadset®, the original threadless headset, to market – kicking off a major change in the way bicycle frames and forks would be developed going forward.

The original design of that revolutionary headset is still found in almost all bikes on the market today.

Additional information

Cups and Covers

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

Compression Ring

Cup-in compression ring

Crown Race

Aluminum crown race with integrated low-friction seal


Lightweight aluminum/ steel hybrid 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.


Interlok® spacer compatible

Stack Heights

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

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