Shimano 6800/6870 Ultegra Pulley Set (Black) HSN-27102000 the TNS-4 perfectly aligns the

the TNS-4 perfectly aligns the star-fangled nut and sets it to the proper depth every time

and 15x110 thru axle hubs

Teeth and brushes get into every link to provide a deep clean

Replaceable pin (part # CTP)

Close gear steps between primary sprockets creates smooth

Shimano 6800/6870 Ultegra Pulley Set (Black) HSN-27102000 the TNS-4 perfectly aligns theIf you need to replace the pulley wheels for your Shimano Ultegra or Ultegra Di2 rear derailleur, this is the correct set to keep your premium drivetrain humming along with quiet, low friction precision. Specification 11 Teeth Composite construction is durable, reduces chain wear Easily mounted using 3mm Hex key (use a clean edged hex key, not worn) Both guide and tension pulleys feature sealed cartridge bearing Compatible with RD R6800, RD R6870