This hydraulic disc brake set provides powerful braking performance for your electric bicycle or motorcycle. Featuring four piston calipers, they deliver firm, consistent braking power through the bike's hydraulic lines. The brake calipers clamp down on 160mm rotors for superb control, whether riding on trails or navigating urban streets. Adjusters on the calipers allow for easy pad alignment and wear indication ensures your brakes don't require attention until the pads are truly worn. A PM adapter is included to mount the brakes to common bicycle frame mounts. With a simple bolt-on installation, you can upgrade an existing bike or electric bike to the stopping power of hydraulic disc brakes.