With KMCs " Double Durability" this chain is designed to outlast any of the competition, perfect for the market of "fit & forget" components! The general idea of having single speed or internal hub gears is for lengthened life & low maintenance, this chain follows that same ideal. Warranty The life of all KMC Double-X Durability & Triple X durability chains are guaranteed to last longer than other brands. Double X-Durability warranty,
Includes:: all X-SL, X-EL, X10e, X9e, X101 & X1 models. If you are not satisfied with the durability of your chain, send & email to: double X@kmcchain.nl Should you have a valid complaint you will receive a replacement chain with KMCs compliments.