Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. It only takes a minute to sign up.
Sign up to join this community
This is almost certainly very simply, but how do you undo the chainring bolts on the SRAM red chainset? I can fit a 5mm (or 8mm can't recall now) hex head into the black screws, but they just spin on the spot. I have tried both the front and back. Some seem harder to spin than the others, but I can't work out how to remove them.
I suspect there's a sort of nut on the back, with a slot for a screwdriver. Difficult to reach without a specially shaped screwdriver, though.
As noted in the comments, you need to use a 6mm hex on the front and a 5mm on the back. Using these both at once will engage the bolts, and they will undo
