I picked up a Sears minibike with a scrub brake. The top of the scrub tilts towards the tire, when relaxed, so it rubs when rolling. I looked at the pics of some of the bikes with scrubs brakes, on here and they all look nice and vertical (no rubbing). I figured it had to pivot, so I unwound the ends of a spring and slipped the bolt through it to tilt the scrub back when relaxed, so far it works. Is there a better way to do this? Maybe I'm missing an original part (or spring) in there. Sorry if this sounds unclear, maybe the pics will explain it better.