This is how it works: Crank tuning made easy
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With the right tool, you can swap your old crank for a tuning version in no time at all. Here we have also replaced the small sprocket on the Bosch motor.
Here you will find the instructions for crank conversion and sprocket change:
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Worthwhile investment: crank puller, e.g. from XLC for 15 euros. Special tool for Bosch engines: The Spider costs 29.95 euros >> e.g.available here.
