Shimano (Cycling) DEORE XT FD-M8100 Front Derailleur 2 x 12-Speed Bnad IFDM8100MX6

Side Swing / Front Pull 

Attachment: Clamp Band 34.9mm , 28.6 mm, 31.8 mm

Compatibility: 2x 12-speed Shimano 

Largest chainring (Outer gear) : 36-38 teeth

Max. Front difference (capacity) :  10 teeth

Chainline: 48.8mm non-boost , 51.8mm boost

Chain stay angle : 66-69°