The SRX series chains are an excellent value for any street machine. EK’s Quadra-X Ring chains are friction-reducing X Rings helping to ensure high-performance and increased wear life when compared to a standard O-Ring chain. Quadra-X Ring design reduces friction by as much as 40% because of smaller contact area. The X-Ring’s 4 point contact patch also offers better sealing than conventional o-rings. Available in the SRX, MVXZ, ZVX2 and ZZZ chain series. X-rings seal in the factory grease and keep out the harsh elements.