What size front derailleur does this use?

Tech Specs:

Frame Material, Main Triangle:

Aluminum 

Frame Material, Rear Triangle/Swing Arm:

Aluminum 

Suspension Linkage Material:

[Upper] carbon fiber; [Lower] aluminum 

Pivot Type:

Angular contact bearings with grease ports 

Fork Length:

140-160mm 

Rear Travel:

5.5in 

Suspension:

VPP 

Shock Included:

Fox Float RP23 

Headset:

1.125in 

Integrated Chain Guide:

No 

Accessory Cable Stop:

Seat Dropper 

Rear Axle:

135 x 10mm 

Seat Post:

30.9mm 

Head Angle:

69deg 

BB Width:

73mm 

Weight:

[Size medium, with shock] 6lb 2oz (2790g) 

Extras:

Shock pump, grease gun, chainstay protector 

Recommended Use:

All-mountain riding, XC 

Manufacturer Warranty:

2 Years