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SKU: SCAP0012

Profile Design Threadless Conversion Kit - 22.2mm to 28.6mm for Threadless Stems, Polished Silver Finish, Alloy Construction, Fits 1" and 1-1/8" Forks, Steerer Clamp OD 25.4mm, Quill Insert Compatibility, Enhanced Performance & Easy Installation

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Description
Specifications

Upgrade your bicycle's versatility with the Profile Design Threadless Conversion Adapter, expertly crafted to seamlessly convert a 22.2mm (1-inch) threaded fork steerer tube into a modern 28.6mm (1-1/8-inch) threadless stem interface. Designed for avid cyclists seeking durability, performance, and style, this converter enhances compatibility with a wide range of handlebars and stems, making it an essential upgrade for vintage bike restorations or mixed-component builds.

Materials & Construction:

Manufactured with high-quality, polished silver aluminum alloy, the Profile Design Conversion Adapter offers exceptional strength, corrosion resistance, and a sleek aesthetic. Its lightweight yet durable construction ensures reliable performance ride after ride, adding minimal weight without sacrificing durability.

Performance & Engineering:

Precision-machined for a perfect fit, this conversion adapter provides a secure and stable connection between your threaded fork and a modern threadless stem system. The adapter accommodates a steerer clamp OD of 25.4mm for 1 1/8" stems, with the ability to increase handlebar height by approximately 25mm when used with spacers. The 41mm clamp length ensures a snug fit that enhances steering responsiveness and rider control.

Components & Technology:

Key features include compatibility with 1" (22.2mm) and 1-1/8" (28.6mm) steerer tubes, with specific insertion diameters of 22.2mm and 25.4mm respectively. The adapter's design incorporates a robust clamping mechanism and precise manufacturing tolerances, ensuring a secure, slip-free connection that maintains alignment under load.

Style & Use Case:

Featuring a polished silver finish, this adapter adds a touch of sophistication to your bike's cockpit. Ideal for bike builders, restorers, or enthusiasts looking to upgrade vintage bikes or retrofit modern components onto older frames, it offers an elegant solution that combines form and function. Its compact design makes it suitable for urban commuting, recreational riding, or competitive cycling where reliable performance is paramount.

Innovative & Differentiating Features:

Unlike generic adapters, the Profile Design Threadless Conversion Adapter is engineered specifically for compatibility, ease of installation, and long-term durability. Its 25mm rise increase with spacers allows customization of handlebar height for optimal rider ergonomics, making it versatile for various riding styles. The polished finish not only enhances aesthetics but also provides added resistance to corrosion and wear.

Specifications:

- Steerer Clamp OD: 25.4mm (1-1/8"), 22.2mm (1") for stem insertion

- Quill Insertion Diameter: 25.4mm for 1-1/8" stems, 22.2mm for 1" stems

- Clamp Length: 41mm (1-5/8")

- Approximate Handlebar Rise Increase: 25mm with spacers

- Material: Polished Aluminum Alloy

- Finish: Silver polished

Transform your vintage or mixed-build bike with the reliable, high-performance Profile Design Threadless Conversion Adapter-designed to connect the old with the new for a smoother, more versatile ride.

  • Seamlessly convert 1" threaded forks to modern 1-1/8" threadless stems with this Profile Design Threadless Conversion, ideal for upgrading classic bikes and enhancing ride compatibility.
  • Constructed with durable, polished silver alloy for corrosion resistance and a sleek, professional finish that complements any bike aesthetic.
  • Features precise steerer clamp sizes-25.4mm for 1-1/8 steerer tubes and 22.2mm for 1" forks-ensuring a secure, adaptive fit across various bike setups.
  • Designed for performance and versatility, this conversion allows for approximately 25mm of rise adjustment using spacers, enabling customizable handlebar positioning for optimal riding comfort.
  • Engineered with high-quality materials and advanced component technology, this conversion improves steering stability and handling while maintaining a lightweight profile for enhanced cycling efficiency.
Quill Insertion Diameter1"
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We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or

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Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

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If you need to return your order please email us at info@365cycles.com, call us at 603-968-5797, or use the live chat on our site.

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365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds!

If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


Company Core Values: 

These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

Customer Loyalty

Put yourself in their shoes and support those who support us.

You Control the Outcome

If it is to be, it’s up to me" You are personally responsible for controlling the outcome.

Seek Understanding

Understanding the answer is more important than the answer.

Progress Not Perfection

Pick a direction, analyze the results, and be willing to change course.

Will to Win

Customers, 365 Team, Partners, all need the will to win. Bring the Will to Win to every conversion.

Keep Moving

Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.

Do the Right Thing:

Doing the right thing is more important than doing the thing right.

Stronger together:

If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

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