How new are the tires? New tires have little rubber nibs sticking out where the rubber was pressed into the mold and they were made from the slightly extra rubber pushing out the air vents. If one of these is hitting a brake pad or arm it will make that ticking noise and they're very hard to see doing it! The fix is to simply take some pliers and pluck the offending nib off the side of the tire just as you would do a wild hair.