Pedro's Syn Lube is a wet chain lubricant for long rides and harsh, wet or muddy conditions. Its synthetic formula is intended to stay on the chain when a light dry-weather lubricant would be the wrong choice.
Apply it to the chain rollers, rotate the drivetrain to distribute it and allow at least an hour before riding. Wiping excess lubricant from the outside of the chain helps keep the application where it is needed.
