For the ultimate durability EBC presents it's "R" series high density series pads. A sintered copper material made in our own USA facility, the "R" series of heavy duty ATV and moto-x pads have become an aftermarket standard offering high durability, high resistance to contamination by mud, water, sand and grit etc. offering reduced disc damage and long pad life. Sintered brakes are a very modern and interesting technology, click here to read more about EBC sintered brakes.