Quill Adaptor
Best upgrade for vintage cyclists wanting modern handlebar compatibility.
Modernize your classic bike with the EVO Quill Adapter. This essential component seamlessly converts a 1-inch threaded fork to accept modern 1-1/8-inch threadless stems, allowing for easy integration of contemporary handlebars and components. Crafted from durable AL6061 alloy with a strong Cr-Mo bolt, it ensures lasting performance and reliability. The adapter also provides a practical 1-inch height extension, enhancing your riding position and aesthetic. It's the perfect solution for updating vintage rides with modern functionality and style.
$26.00
Owner Satisfaction
4.6
/ 5
Category Rank
359
/ 2113
#359 in Components
Price vs Category Average
-75%
Below average
Material
6061
/ AL alloy construction with Cr-Mo bolt
Who it's for
- Restoration enthusiasts upgrading to modern stem standards
- Cyclists seeking a personalized, ergonomic cockpit fit
- Home mechanics wanting easier handlebar and stem maintenance
Who should skip it
- Weight-conscious riders building ultralight vintage bikes
- Purists prioritizing a classic, period-correct aesthetic
- Riders preferring a set-and-forget, maintenance-free setup
Performance breakdown
Compatibility Range
Seamlessly bridges the gap between vintage forks and modern stem standards.
Build Integrity
AL6061 alloy and Cr-Mo hardware provide a robust, reliable connection.
Installation Simplicity
Straightforward design makes upgrading your cockpit a quick weekend project.
Ergonomic Adjustment
The one-inch height extension offers a subtle but welcome posture improvement.
Weight Efficiency
Sturdy construction adds a noticeable bit of heft to the front end.
Aesthetic Integration
Clean lines help modernize vintage frames without clashing with classic styling.
Key Specs
Material
AL6061 alloy construction with Cr-Mo bolt
Conversion
Converts 1" (25.4mm) threaded fork to 1-1/8" (28.6mm) threadless
Stem Compatibility
Compatible with 1-1/8" (28.6mm) threadless stems
Height Extension
Adds 1" (25.4mm) of height extension
Weight
201g
Features
- Converts 1" threaded fork to 1-1/8" threadless
- Durable AL6061 alloy construction
- Includes a strong Cr-Mo bolt
- Adds 1 inch of usable height extension
- Ideal for classic bike modernization
- Compatible with modern threadless stems
What customers say
Reviewers overwhelmingly praise the EVO Quill Adaptor for its exceptional quality and reliability in modernizing classic bicycles. The precision engineering ensures a secure fit, eliminating common issues like creaking or slippage often found with lesser adaptors. Its core function—seamlessly converting older quill stem systems to modern threadless standards—is executed perfectly. Installation is straightforward, boosting user satisfaction significantly. While slightly heavier than a pure threadless setup, users accept this trade-off for the substantial gains in component compatibility and stiffness. This adaptor is celebrated as a highly recommended, high-quality bridge component that effectively extends the life and enhances the performance of vintage frames.
Know before you buy
This adapter is designed for standard 1-inch (25.4mm) threaded forks. Before purchasing, ensure your fork's internal diameter is compatible with standard quill-style stems to ensure a proper fit.
Yes, once installed, the adapter provides a 1-1/8 inch (28.6mm) diameter interface, allowing you to use almost any modern threadless stem on your vintage bike.
The 1-inch extension provides a slightly more upright riding position, which can improve comfort on longer rides. While it changes your geometry slightly, it is generally subtle enough that most riders will not notice a significant difference in handling.
Installation is straightforward and similar to replacing a standard quill stem. You will need basic hex keys to tighten the Cr-Mo bolt, which secures the adapter inside the fork steerer tube.
The adapter weighs 201 grams. While it adds a small amount of weight compared to a traditional quill stem, the benefit of being able to use modern, lightweight threadless components often offsets the difference.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$26