3D Printed ASA (UV Resistant) Specialized Tarmac SL8 / SL9 / CRUX 5 Seat Post Mount for Garmin Varia Radar/Light/Accessories

NOTE: Fits only Garmin Varia RTL515, RVR315 and Magene L508

Compatible Bikes:

Specialized Tarmac SL6

Specialized Roubaix 20-26

Overview:  Engineered for Specialized Tarmac SL6 and Roubaix seat posts, this mount delivers durability, performance, and ease of use. Made from UV-resistant ASA material, it withstands harsh outdoor conditions while maintaining its structural integrity. With a 90% infill, the mount ensures superior strength and rigidity. The Garmin adapter is injection-molded and mechanically secured using a screw and nut, ensuring a highly durable and reliable connection.

Designs: This 2-piece 3D-Printed Mount offers a seamless installation process that takes less than a minute. It secures firmly with two nuts and bolts (requires hex key, not included), allowing for easy adjustments to the desired height along the seatpost. Once installed, the Garmin Varia is positioned perpendicular to the ground, close to the seatpost for improved aerodynamic performance. This setup minimizes drag while optimizing the radar and light for maximum effectiveness. Despite its robust construction, the mount is lightweight, weighing approximately 16 grams. Its customizable fit and durable materials make it a reliable, efficient, and convenient addition to your cycling setup.

Note: Garmin adapter style may vary (functionally identical)

🛠️ Key Features

UV-Resistant ASA Construction

Made from premium ASA filament for excellent UV resistance and outdoor reliability. Unlike PLA/PETG, ASA won’t warp, fade, or degrade under extended sun exposure.

Injection-Molded Garmin Adapter

The included adapter is injection-molded—not 3D printed—to ensure a tight, durable locking interface without the gradual wear common in printed adapters.

Secure, Close-Fit Aero Design

The mount positions the Varia perpendicular to the ground for maximum visibility and radar performance, while keeping it close to the seatpost for clean aerodynamics.

Adjustable Mounting Height

Allows positioning on the thicker portion of the seatpost for a stronger hold and reduced light glare compared to higher saddle-mounted versions.

Engineered Fitment System

A flexible clamp opening lets you slide the mount onto the post, then secure it using M3 screws and nuts.

(Requires a 2 mm hex key — not included.)

90% Infill for Maximum Strength

Dense internal structure ensures durability on rough roads and long rides.

Matte Finish

Final print has a clean matte texture due to the UV-resistant ASA material.

⚖️ Weight

Approx. 20 grams

📦 What’s Included

1 × UV-Resistant Seatpost Mount

1 × Garmin Varia Adapter (injection-molded)

Nuts and bolts (for clamp tightening)

❗ Installation Notes

Gently flex the clamp to slide it onto the seatpost through the small opening.

Tighten the screws only until the gap begins to close—do not overtighten.

⚠️ Safety Notice: Always use a safety lanyard when installing your light or radar. The seller is not responsible for any damage, loss, or breakage if the device becomes detached during use.