how thick should my brake pad be? how do i know if itz too thin and i need to replace it on a garelli? Also, is it ok to screw my brake cable into the brake while pushing the brake arm down so that i get more resistance and quicker response from the brake, or should i just keep it loose and keep pushing the brake lever all the way down to stop? any info on brakes would help. also, what bearing is don talking about?