Runwell COG1218L Fixed Steel & Ti Cog Wrench
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The Runwell COG1218L Fixed Steel & Ti Cog Wrench is a sprocket and lockring tool designed for installing and removing fixed gear sprockets from 12T to 18T. The main advantage is that you avoid dealing with a chain whip that can come loose and damage the bike or yourself. The tool grips the sprocket directly and transfers torque efficiently, making it easier to remove sprockets that have seized tightly in the hub threads.
Runwell is a Japanese tool brand from Tsubame-Sanjo, specializing in hand tools for track bikes and fixed gear. The COG1218L was developed based on requests from a mechanic who wanted to work faster during frequent sprocket changes. One side fits 12–15T sprockets and the other 16–18T, while the tool also functions as a lockring wrench.
This is an especially good fixed gear sprocket tool for bike mechanics and velodrome cyclists who often change gearing. The wear plates are replaceable, giving the tool a long lifespan. The COG1218L is made in Japan and intended for sprockets and lockrings made of steel or titanium – not aluminum or carbon fiber.
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Specifications
Specifications
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GPSR
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