Yes. Loosening the mount bolts will allow for big adjustments. Since Hayes brakes have an overflow resevoir built-in to the master cylinders, they self-adjust - so they're virtually maintenance-free for long periods. The most you might need to do is force the pistons back into the caliper bores to "reset" the pad return distance and centering. You do this by removing the wheel and jamming a plastic wedge (that should have come with your brakes) between the brake pads. Then re-install the wheel and squeeze the lever a few times.