1Attach the front derailleur to bike frame, temporarily tighten the toggle bolts, and then adjust the flat part of the chain guide outer guide plate to be parallel to the flat surface of the maximum crankset. 2Make adjustments, make it have 1-3mm space between the outer guide of the chain guide and the maximum crankset. 3After the adjustment is complete, tighten the ring bolts. 43 speed design, matching 10/11 speed rear derailleur. 5Professional manufacturing, stable performance and high reliability.Condition: 100% Item type:Front Derailleur Model:FD-M400 Material: aluminium alloyColor: blackWeight: Approx. 168g Clip ring diameter: Approx. 31.8mm/1.3in, 34.9mm/1.4in Speed grade: 3 speed, matching 10/11 speed rear derailleur Crankset: 3 gears, maximum crankset 40-48T, crankset tooth capacity 22T Pull line: double pull Chainstay angle: 66-69 Installation location: low installation Chain middle line size: Approx. 50mm/2in 1 xDerailleur