Features & Benefits
- Compression plug suited for carbon and aluminum tubes
- Available in 1” and 1-1/8” sizes
- Larger size offers more strength and safety
- Carbon cap version recommended
- Neco is a trustworthy brand offering high quality components
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Neco Headset Expander Top Cap Star Nut Plug Bolt Stem Expanding Nut Bolt Carbon Fiber Cap Cover Long Large Size Extra Large Carbon Cap 1-18
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Compression plug is good for carbon tube and aluminum tube, larger size is stronger and safer, available in 1” and 1-1/8” sizes, carbon cap version looks great, Neco is a reliable brand
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What Stands Out
Durable Carbon Fiber
Constructed from high-quality carbon fiber, this headset expander offers exceptional strength and lightweight performance, ensuring long-lasting use while maintaining optimal bike handling.
Enhanced Stability
Designed for superior stability during rides, this expander securely holds the headset in place, preventing unnecessary movement and enhancing overall bike control on various terrains.
Easy Installation
The Neco Headset Expander is easy to install with its user-friendly design, making it a hassle-free upgrade for cyclists looking to improve their bike's performance quickly.
Product Details
| Thread Size | 1-1/8 |
| Color | Extra Large Carbon cap 1-1/8 |
| Thread Type | Unified National Coarse (Unc) |
| Inside Thread Size | #4, #5 |
| Thread Style | BSP coarse pitch |
| Thread Class | Coarse |
| Screw Head Style | Flat |
| Compatible Groove Diameter | 25.4 Millimeters |
| Grade Rating | industrial |
| Item Weight | 70 Grams |
| Size Name | Extra Large Carbon Cap 1-1/8 |
| Item Diameter | 1.13 Inches (2.9 cm) |
| Brand | Neco |
| UPC | 782899743861 |
| Manufacturer | Neco |
| Model | headset compression nut |
| Part Number | headset compression nut |
| Metal Type | Stainless Steel |
Who Should Buy?
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Cyclists
Ideal for cyclists needing a reliable expander system for stable headset adjustments during rides.
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Mountain Bikers
Perfect for mountain bikers who require a durable, lightweight solution for their bike's headset system.
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Bike Mechanics
A great choice for bike mechanics looking for high-quality components to optimize bike performance and safety.
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Casual Riders
Not suitable for casual riders who may not need advanced headset features or high-strength components.
Product Description
Neco Headset Expander Top Cap Star Nut Plug Bolt Stem Expanding Nut Bolt Carbon Fiber Cap Cover Long Large Size Extra Large Carbon Cap 1-18
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Customer Questions & Answers
-
Question:
Is the compression plug suitable for both carbon and aluminum tubes?
Answer: Yes, the compression plug works for both types of tubes -
Question:
What sizes are available?
Answer: The plug comes in 1” and 1-1/8” sizes -
Question:
What is the recommended cap?
Answer: The carbon cap version is recommended as it looks great
Neco Headsets Editorial Review
Overall, customers were satisfied with the Neco Headset Expander Top Cap Star Nut Plug Bolt Stem Expanding Nut Bolt Carbon Fiber Cap Cover Long Large Size. The product is meant to be placed inside the carbon steering tube instead of the star nut which is not recommended for carbon. Customers were happy with the perfect fit of the product, with one customer even noting that it was a rare find. Users found that the product worked well in their carbon steerer tubes and there are no issues for those who carefully follow the instructions, clean and sand the steerer tube thoroughly before use. One customer noted that the recommendation of 10 Nm provided by the seller was not enough to hold the position and they had to torque to 16 Nm. Another customer noted that the product did not hold at all even at the maximum recommended torque. A customer was happy that the product was available in extra large sizes as it provided more hold force. The product comes with an aluminum or carbon cap, which is a cosmetic choice in terms of material, and used for preload only. The lip on the top of the expander cap ensures a specific, Consistent position for the cap.
Customer Reviews & Ratings
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Pros
- Perfect fit for the rare one-inch compression plug
- Easy to install
- Lip on the top of the expander cap ensures a specific, Consistent position for the cap
- Comes in extra-large sizes for more hold force
Cons
- Torque recommendation provided by the seller was not enough for some customers
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer
“Accurate delivery timing given”
16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer
“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
LM
Leila
Verified buyer
“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer
“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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