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This is a cover for the Trek Rail Chainstay Pivot.

It exists to stop stones and crud getting into the very tight clearance between the rear triangle and the main frame that this bikes design required in order to keep the chain stays as short as possible. 

Black Flexible TPU

Notes

• This does obstruct the charging port, you can easily lift it out the way.
• I recommend invisiframe or helitape to prevent scratching.

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