12-speed steel performance and valueSpecially developed to meet the requirements of the latest generation of high-performance shifting systems*. The optimised geometry of the inner link lends the chain exceptional wear properties. The Connex Speed Wing link shifting performance on current 12-speed shifting systems is extremely fast and quiet. (*Note: Not compatible with SRAMâs âFlatTopâ 12spd system)The 12s0 is the standard model in the 12-speed Connex chain series. Precision made in Germany using long-lasting, heat-treated steel and offers quiet, high performance gear changes with exceptionally low wear characteristics.Supplied with the exclusive, re-usable, tool-free Connex QR joining link. Compatible with all bicycle 12-Speed gear systems except SRAMâs âFlatTopâ 12spd.