Bicycle Crankset 144BCD Mountain Bike Square Hole Crank Aluminum Alloy Single Speed Crank Chainwheel 165mm 49T Crank Set. Material: tooth plate /AL7075, crank /G609 aluminum 2.
Tooth number: 49T or 48T(If you need 48T, please contact me) 3. Manufacturing process: tooth disk /CNC finishing, crank /3D high density forging integrated forming 7. Surface treatment: tooth plate/fine sandblasting anode, crank/fine polishing anode 8.