Thread: What is this thing on the seatstay?
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Old 05-14-19, 12:46 PM
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riverdrifter
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What is this thing on the seatstay?

What is this small, button-shaped thing-a-ma-jig on the chain side seatstay?

Thanks!
Last edited by riverdrifter; 05-14-19 at 01:45 PM.
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