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Trek 7.2 Pedals Don't Turn Gears

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Trek 7.2 Pedals Don't Turn Gears

Old 03-18-21, 05:27 PM
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KAOS1960
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Question Trek 7.2 Pedals Don't Turn Gears

Occasionally when I am riding the pedals keep going but the chain stops working as in bike quits moving. Any idea what can be causing this? I've had the bike tuned up twice in recent years and it works for a while and then back to this.

TIA!
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Old 03-18-21, 08:16 PM
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dr1445
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Cassette hub pawls not engaging?
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Old 03-19-21, 06:47 AM
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KAOS1960
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Lol, the only part that I understand is "not engaging" but that certainly sounds like a possibility. Is there a way to perform a DIY fix?
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Old 03-19-21, 07:00 AM
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dabac
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Originally Posted by KAOS1960 View Post
Lol, the only part that I understand is "not engaging" ....
The pawls are important parts of the ratchet system that makes up the one-way Clutch which allows the rear wheel to alternate between driving and coasting.
Originally Posted by KAOS1960 View Post
...Is there a way to perform a DIY fix?
Depends on your skills, determination and tool access.
It’s possible to do what’s called a ”freewheel/freehub flush” which often allows the pawls to work as intended again.
But for freehubs, it does require some tools and will create a bit of a mess.
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Old 03-20-21, 04:25 AM
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do search on the park tool site or youtube.
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