Bike Medicine's Purple Extreme is an advanced, high performance, synthetic bike chain lubricant. It provides excellent protection for chains, open gears and exposed metal surfaces subjected to severe loading. In addition, it works extremely well even in abrasive, cold, wet or acidic environments. Purple Extreme's additive technology forms a slippery, super-tough, synthetic film on metal surfaces that protects drivetrain parts far beyond the ability of conventional oils or waxes.

As reviewed on bikeco