Information
Product Details
Stylish, durable, and easily serviceable. Those were the goals when designing our headsets. We machine engrave our logos for a classy look, use durable and easily replaceable Enduro stainless steel angular contact bearings, and use a “split” crown race design that you can install and remove by hand.
The IS41│IS52 headset is designed to fit frames with integrated tapered 41mm top/52mm bottom head tubes and tapered 1-1/2″ (40mm) fork steerers. But nowadays with all the different headset standards available we needed to get specific so check the SHIS specs below. SHIS? Yep, that’s the “Standardized Headset Identification System” used to verify compatibility.
Specs
- 6061-T6 aluminum
- Machine engraved logos
- Easily replaceable Enduro stainless steel angular contact bearings
- “Split” crown race for tool-free installation and removal
- Stack height
- Upper: 8mm
- Lower: 1mm
- Weight
Compatibility
- A perfect match to our really sweet matching headset spacers, available separately
- The IS41│IS52 headset is designed to fit frames with integrated tapered 41mm top/52mm bottom head tubes and tapered 1-1/2″ (40mm) fork steerers
- The “IS” stands for “Integrated System” meaning the bearings drop directly into the head tube, without the traditional style “headset cup” that would press into the frame, and the “41”and “52” refer to the outer diameter of the upper and lower bearings, respectively.
- SHIS specification
- Upper: IS41/28.6
- Lower: IS52/40
- Not compatible with carbon forks that have integrated crown race seats
- SHIS definitions on the Park Tools website: here
- Frame/Fork specs:
|
Frame upper head tube inside diameter |
41.10mm to 41.2mm with a 45 degree contact angle |
|
Frame lower head tube inside diameter |
52.05mm to 52.15mm with a 45 degree contact angle |
|
Fork steerer diameter top section |
28.45mm to 28.6mm |
|
Crown race seat diameter for “tapered 1-½” |
39.79mm to 39.85mm |
Bearings
|
Headset Model |
Upper Bearing (inner/outer angle) | Lower Bearing
(inner/outer angle) |
Lower Fork Race Compatibility |
|
IS41│IS52 |
ACB3645SS 36/45 | ACB6808CCSS 36/45 |
1-1/2” (40mm) |
What’s in the box
- One headset which includes:
- Top cap bolt
- Top cap
- Bearing cover
- Upper bearing compression ring
- Upper bearing
- Upper cup
- Lower cup
- Lower bearing
- Crown race
- Headsets no longer include Star Nuts due to the Earth’s star nut overpopulation crisis. If you need one, they are available separately here.
FAQ’s
- Will this headset fit my bike?
- You will need to do some homework and get the SHIS specs of your frame and fork which those manufacturers will have. See those definitions here. Also see the “Compatibility” section on this page. Simply telling us what model bike you have may not be enough info to go on. Help us help you and get the specs!
