Shimano DEORE RD-M6000 10-Speed Rear Derailleur Medium Black Sunshine_Enriched make sure your specific trainer

make sure your specific trainer will accommodate the width of the thru-axle equipped bike that you are using

Inverted Tread Design Reduces Rolling Resistance – Less Physical Effort While Attaining Greater Speeds

Direct mount rings designed for SRAM cranks with removable spiders

9mm open dropout design

Shimano DEORE RD-M6000 10-Speed Rear Derailleur Medium Black Sunshine_Enriched make sure your specific trainerThe Shimano Deore M6000 Series rear derailleur offers efficient and smooth shifting in order to maintain speed and acceleration in change of terrain. Capable drivetrain for riding aggressively through trails. Optimized gear combination and gear ratio for trail riding by front and rear system Wide range cassette compatible Silent and stable during aggressive riding Improved stability and chain retention for long time Improved ShadowRD+ construction