Waxed CN-M8100 XT/Ultegra 12 Spd.Chains are waxed on demand using Silca Secret Blend Hot Wax. Wax offer greater component longevity, cleanliness, and better efficiency. The wax is a solid lubricant meaning that dirt and contaminants can't get in the chain which keeps your chain from wearing as quickly. In almost every application, we recommend wax. The M8100 chain provides enhanced chain retention thanks to an extended portion of the inner plate. The new chain features quick link