its on an avid hydraulic disk brake - but its just the lever.. i tried a 3mm fits but is loose and small.. a 4mm is too big and does not fit,,, any clue what is standard for that?? i tried all hex keys on my multi bike tool and 3mm is only one that fits.. thanks
a 3mm fits bit is a bit small and feels like it will strip the bolt.. the 4mm is too big and wont fit.. its a standard avid brake,, on a norco aurum,,, arent those brake lever bolts standard? could my 3mm hex be worn out??