Shimano RD-8000 Ultegra Rear Derailleur 11-Speed Type:GS T1710 E-Thru trainer axle M12x1

T1710 E-Thru trainer axle M12x1

Those bearings comprise either Standard or Coated Bearings

Compatible with both 700c and 650b wheel sizes for speed and comfort

remaining inside the chain even in testing under full water submersion

put it in the washer first

Shimano RD-8000 Ultegra Rear Derailleur 11-Speed Type:GS T1710 E-Thru trainer axle M12x1*New low profile design *RD SS covers: 11 25T to 11 30T*Sleek integrated appearance*Wide compatibility*RD GS covers: 11 28T to 11 34T*Race endurance*Optimized slant angle CAGE LENGTH SS Short,GS Medium TOTAL CAPACITY 35T,39T MAX FRONT DIFFERENCE 16 CABLE ADJUSTER X COLOR SERIES COLOR AVERAGE WEIGHT 200g,210g MOUNT Direct attachment (conventional) GUIDE PULLEY BEARING Sealed Bearing TENSION PULLEY BEARING Sealed Bearing NUMBER OF PULLEY TEETH 11 SERIES