Shimano RD-M8100 REAR DERAILLEUR XT SHADOW+ 12-SPEED LONG 51T MAXIMUM Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button... Shimano RD-M8100 REAR DERAILLEUR XT SHADOW+ 12-SPEED LONG 51T MAXIMUM Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button...