Description
Note: As the White Industries catalogue is diverse, we don't stock every variant or colour. However, we place regular airfreight orders. If an item is in stock at White Industries, we can usually have it here within a week. Even if it's not in stock, they can often assemble it for us, and we can have it within three weeks at most. Feel free to get in touch if you're after something specific!
The IS42│IS52 headset is designed to fit frames with integrated 42mm/52mm head tubes and works with tapered and straight fork steerers. The “IS” stands for “Integrated” as the bearing sits directly inside the frame’s head tube without a cup. The “42/52” stands for the top/bottom inside diameter of the frame’s head tube.
Features
- U.S. sourced 6061-T6 aluminum
- Machine engraved White Industries logos
- Easily replaceable 440C Stainless Steel Enduro bearings which feature a limited lifetime warranty
- “Split” crown race for tool-free installation and removal
- Really sweet matching headset spacers available separately
- Can accommodate 3 types of fork steerers:
- “Straight” 1-1/8″ with a 30mm crown race
- “Tapered 1-¼” with a 33mm crown race seat
- “Tapered 1-1/2” with a 40mm crown race seat
Specs
- SHIS specification
- Upper: IS42/28.6
- Lower: IS52/40
- Stack height
- Upper: 8mm
- Lower: 1mm
- 45 degree outer contact angle
- SHIS definitions on the Park Tools website: here
- Frame/Fork specs:
|
Frame upper head tube inside diameter |
41.95mm to 42.05mm 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 “straight 1-⅛” |
30.015mm to 30.075mm |
|
Crown race seat diameter for “tapered 1-¼” |
33.03mm to 30.09mm |
|
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 |
|
IS42│IS52 |
ACB36451125SS 36/45 | ACB6808CCSS 36/45 |
1-⅛” (30mm) 1-¼” (33mm) 1-½” (40mm) |