The Rock N Roll Extreme Lube cleans and lubes at the same time, and is great for mountain biking as well as high performance road riding. While the Extreme is "wetter" than any other lube provided by Rock N Roll, it is still far more dry than other lubes on the market. The lube has a gel membrane suspended in the fluid. This membrane seeps deep into the rollers and stays there, keeping the metal parts flexing, moving smoothly, shifting crisply, and doing everything quietly. This performance lube comes in a 16 oz. bottle which can last for years.