White Industries
White Industries IS41/IS52 - 1-1/2 crown race
White Industries IS41/IS52 - 1-1/2 crown race
Low stock
Couldn't load pickup availability
-
NZ‑Based Support – Talk to real riders who understand your needs. -
Secure Payments – Shop Pay, Google Pay, Apple Pay & major cards accepted. -
Warranty Protection – All bikes backed by manufacturer warranties. -
Easy Returns – Hassle‑free returns on unused gear.
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 IS41│IS52 headset is designed to fit frames with integrated 41mm/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 “41/52” stands for the top/bottom inside diameter of the frame’s head tube.
Note: As of 9/14/23, headsets will no longer include Star Nuts due to the Earth’s star nut overpopulation crisis. If you need one, they are available separately.
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: IS41/28.6
- Lower: IS52/33 or IS5240
- 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 |
41.10mm 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 “straight 1-⅛” |
30.015mm to 30.075mm |
|
Crown race seat diameter for “tapered 1-1/4” |
33.03mm to 33.09mm |
|
Crown race seat diameter for “tapered 1-1/2” |
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 |
1-⅛” (30mm) 1-¼” (33mm) 1-½” (40mm) |
Shipping
Shipping
Click & Collect – Free
Order online & collect at our Onehunga store.
NZ Shipping Costs
- General Items: $8/item
- Bikes & Frames: $100 (North Island) / $120 (South Island)
- Large/Bulky Items: $30 (North Island) / $60 (South Island)
- Helmets: $20 (North Island) / $25 (South Island)
Rural: Extra fee applies — select “Rural Delivery” at checkout.
International Orders – Contact info@rouleurcycles.co.nz for a quote.
Bike Shipping
- Fully assembled, tuned & safety‑checked before dispatch.
- Carefully boxed (minimal reassembly required).
- Recommend mechanic check before first ride.
Timeframes
- General: 3–5 working days (+1–2 for rural)
- Bikes: 5–7 working days (up to 10 remote) + prep time for build/boxing
- Delays may occur during holidays or courier disruptions.
Tracking & Issues
- Tracking emailed once dispatched.
- Contact the courier first for delays. Need help? Email or call us.
- Report damaged/lost parcels within 3 days.
No PO Boxes – Physical addresses only.
Why Buy From Rouleur?
Why Buy From Rouleur?
Trusted NZ Bike Experts – Locally owned & operated with years of experience helping Kiwi riders get the most out of their bikes.
Custom Builds & Personal Fitting – From road to e‑bikes, we tailor every build to your riding style and goals.
Fast, Reliable Shipping – In‑store stock ships next business day. Supplier stock delivered in as little as 3–5 days.
After‑Sales Support That Rides With You – From servicing to upgrades, our workshop team is here for the long haul.
