Facebook Twitter LinkedIn Pinterest Bluesky Threads It's a Microshift R8 3×8 mechanical STI with Rim Brakes. The screw needs a 2mm hex key. by Jogi346 Bicycling Bike Bike Repair Biking Cycling Repair
poop_hadouken on January 2, 2026 5:48 pm It’s a grub screw that locks a pivot point in your shifter for the brakes to engage. The below shows it as part 10. This isn’t the same exact model as yours but is the same thing. No need to mess with it. https://preview.redd.it/4troqgnj4zag1.png?width=553&format=png&auto=webp&s=3a0d3fe902b8125b3970d91cdd166ccf5a7426b3
3 Comments
It’s a grub screw that locks a pivot point in your shifter for the brakes to engage. The below shows it as part 10. This isn’t the same exact model as yours but is the same thing. No need to mess with it.
https://preview.redd.it/4troqgnj4zag1.png?width=553&format=png&auto=webp&s=3a0d3fe902b8125b3970d91cdd166ccf5a7426b3
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