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Impact driver.
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Rim brake
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Left hand drill bit, slow speed and drill it out.
Left hand as sometimes the drill bit catches enough to turn the bolt free.
Then a 2mm easy out should finish the job.
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Yes. On multiple bikes. Which was why I replaced all of them with hex bolts back before TCR4 or something. Probably posted about it on here. You should pay more attention. :P
As to the fix. Think one bike I just used pliers and gave no fucks the other bike needed to be drilled out.
Y-8JZ05000
Y8JZ98010 -
Found it. Got its own thread: https://www.lfgss.com/conversations/375117/
Y-8JZ05000
Y8JZ98010
lynx
Sam
coventry_eagle
hippy
@andyp
The Shimano BR8070 disc brake calipers on my bike have developed the retaining bolt problem, where the bolt thread has seized and the (aluminium) bolt head is so soft that trying to apply any force with a flat headed screwdriver just removes material. Shimano obviously recognised this as a problem as the second generation come with a hex bolt instead of a slotted head.
Has anyone else experienced this, as it is quite common apparently, and if so, how did you remove the bolts?