SHIMANO ULTEGRA DI2 ST-R8170 Hood Button Sticky
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92%
CONF
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Bracket Covers (Pair)
The auxiliary button relies on a physical plunger molded into the rubber hood to actuate the internal electronic switch. Contaminants such as sweat or energy drinks infiltrate the interface, creating a high-friction film that causes the plunger to adhere to the bracket body. Replacing the bracket covers provides a clean, low-friction actuator interface and ensures proper alignment with the internal switch.
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CHECK PRICE
#CommissionsEarned
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8%
CONF
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Secondary Circuit / Wiring Check
Inspect wiring harness.
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CHECK PRICE
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the Bracket Covers (Pair).