FSA Compression Plugs are top assemblies for carbon steerers. Replaces the traditional top cap assembly. Includes cap, bolt, and expander.

Includes cap, bolt and expander. Top assembly for carbon steerers replaces traditional top cap and star nut assembly.

Item Specifications: Color, Black,

FSA Compressor 1-1/8" Carbon Steerer Tube Expander Plug & Top Cap - CNC Machined Aluminum, Anodized Black

Reference Number: 9S99O7

Upgrade your bicycle's steering precision and aesthetics with the FSA Compressor 1-1/8" Black Expander Plug and Top Cap for Carbon Steerer Tubes. Engineered for performance and style, this high-quality component is designed to fit small-diameter carbon fork steerers, ensuring a secure and lightweight fit.

Materials & Construction:

Crafted from CNC machined, anodized aluminum, the FSA Compressor top cap and expander boast exceptional durability, corrosion resistance, and a sleek black laser-etched finish. The combination of premium materials not only enhances durability but also adds a sophisticated look to your bike's cockpit.

Performance & Engineering:

The innovative design replaces traditional star nut and top cap assemblies with a streamlined, single-piece top assembly optimized for carbon steerers. The aluminum expander securely adapts to inner diameters ranging from 21 mm to 26 mm, providing consistent clamping force while minimizing weight (only 37 grams).

Components & Technology:

Includes all essential parts-top cap, bolt, and expander-ensuring an easy installation process. Its precision CNC machining guarantees a perfect fit and smooth operation, preventing slippage and ensuring your fork remains securely clamped under demanding riding conditions.

Style & Use Case:

Ideal for high-performance road, gravel, and mountain bikes equipped with smaller inner diameter carbon steerers, this component offers a clean, minimalist aesthetic that complements modern bike designs. Whether giving your bike a fresh upgrade or replacing a worn-out part, the FSA Compressor top cap adds a professional finish to your steering assembly.

Innovative & Differentiating Features:

- Anodized black finish with laser etching enhances durability and style

- Compatible with 21 mm to 26 mm inner diameter carbon steerers

- Lightweight design optimized for performance and handling

- Replaces traditional star nut, reducing installation complexity

Note: Use of this product may void some fork warranties; please consult your fork manufacturer before installation. Elevate your bike's steering system with the FSA Compressor 1-1/8" Black Expander Plug and Top Cap - the perfect combination of performance, style, and innovation for serious cyclists.

  • Precision CNC machined from durable anodized aluminum, the FSA Compressor 1-1/8" Black Expander Plug and Top Cap offers a lightweight and corrosion-resistant solution for carbon steerer tubes.
  • Engineered for optimal fit with inner diameters ranging from 21 mm to 26 mm, ensuring secure and reliable steering tube expansion and sealing on premium carbon forks.
  • Includes a sleek, laser-etched black top cap, aluminum expander, bolt, and assembly components, providing a clean aesthetic and streamlined installation for high-performance road and mountain bikes.
  • Designed as a top assembly replacement for traditional star nut and cap, delivering improved appearance, easier installation, and greater adjustability for precise headset preload.
  • Innovative, compatible technology tailored for carbon steerer tubes enhances rider confidence and performance, while the advanced aluminum construction maintains a lightweight profile of just 37 grams-ideal for competitive cycling and style-conscious riders.
Item Specifications
ColorBlack
Size1-1/8`
Defined ColorBlack
Color/DesignBlack
Size1-1/8"
Weight37g

Why 365 Cycles?

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At 365 Cycles our mission is to simplify the shopping experience. We want to get you the right product in a quick time frame and be here if you need help with questions, warranty, friend to talk to, etc.

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Shipping & Handling

Most orders placed during the workweek before 1:30 pm EST ship the same day, but in rare cases (peak season/holiday periods) handling time can take up to 48 hours. If you have questions regarding shipping estimates, please let us know prior to placing your order. There is a direct signature requirement for all orders over $500.

Please allow 1-2 business days for your order tracking to update.

  • Cut off for SAME DAY SHIPPING- 1:30 pm EST Monday - Friday
  • Friday afternoon -Sunday orders ship the following Monday
  • Due to carrier restrictions orders shipped to: PO Box, HI, AK, & PR 365 Cycles may use a comparable service to what was selected.

Combined Shipping Discounts

To offer customers savings on shipping, we offer discounts when shipping multiple items from our store. We cannot issue refunds on shipping once an order is finalized so please follow the 5 steps below and ask if you are having trouble with the discount before you make a purchase.

  1. Be sure you are using the US site: https://www.ebay.com
  2. Select Add to Cart (instead of Buy It Now) with items from our store 365Cycles
  3. Click on Proceed to Checkout. On the checkout page, the shipping service on each line item needs to match
  4. Compare First Class vs Priority as sometimes Priority can be cheaper and it gets to you faster!
  5. You’ll need to change the shipping method to Priority on every item in your cart before the rate can be calculated.

Returns

365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.

Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.

Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.

If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!

Exchanges

If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.



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Company Details

365 Cycles
1180 Enterprise Rd
East Petersburg, PA 17520
United States

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