Compact Saddle Rail Mount for Rockbros Tail Light (Twist-Lock)
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A redesigned saddle rail mount for Rockbros twist-and-click tail lights. Redesigned to fit tight spaces under saddles.
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Updated at source:
Model information
- Source
- Printables
- Category
- Outdoor Sports
- License
- Creative Commons — Attribution
The Problem: The original mount included with this Rockbros tail light is quite bulky. It's designed to double as a seatpost mount, meaning the back part protrudes too much and interferes with the seatpost when you try to mount it neatly under the saddle on the rails—especially on a mountain bike where space is limited.
The Solution: I completely reverse-engineered the twist-and-click mechanism to ensure a perfect fit for the light, but changed the outer shell.
Removed the bulky seatpost contact area.
Removed the grooves for the rubber band (as this is strictly for saddle rail mounting).
Shortened the tabs that rest on the saddle rails to make it fit easily into tight spaces.
Mounting: Just like the original rail mount, this custom piece is secured to your saddle rails using two simple zip ties. It sits firmly and doesn't rattle.
Recommended Print Settings:
Material: PETG or ASA (Highly recommended for UV and weather resistance, and to withstand MTB vibrations).
Walls/Perimeters: 4 (For structural strength around the zip tie holes and the twist-lock mechanism).
Infill: 20%
Orientation: Print flat on the build plate.
Supports: No supports needed.