Old 04-16-21, 03:49 PM
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For sure, check out the three basic components of the system but my guess would be that the mechanism within the bar mounted shifter is “gummed” up and failing to properly engage and/or release the ratchet. I’d spray some solvent into the shifter mechanism while attempting to upshift or downshift. Having a repair stand or someway to allow for turning the crank arm with the rear wheel off the ground makes this a lot easier!
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