Jtek MK2 Bar End Shifter for 8 Speed Shimano Internal Hubs Jtek 8 Speed Bar End Shifters Mk2 for Shimano Alfine & Nexus Internal Hubs A cheaperĀ but heavierĀ at 96 grams alternative to the original design. Jtek Shifter for Shimano Nexus and Alfine 8 speed hubs.