T47ADUB Bottom Bracket Fits 68mm/73mm Width of Bicycle Frame(Black) Xpreen Intelligent power transmission: Independent development

Intelligent power transmission: Independent development of the chip can automatically sense ambient changes (According to the environmental conditions to automatically adjust to the radio transmit power

74 inches -5

Control switch: 10 gears shift switch and 1 set switch

black wire is negative

Installed size: 152 x 76 x 10

T47ADUB Bottom Bracket Fits 68mm/73mm Width of Bicycle Frame(Black) Xpreen Intelligent power transmission: Independent development1. Connect the bicycle frame, with strong stability 2. Material: aluminum + nylon + bearing 3. Size: outer diameter 47mm, inner diameter 28. 99mm 4. Inner hole: 47mm 5. BB frame width: 68mm 73mm 6. Net weight: 112g 7. Packing list: 1 x bottom bracket x 1, 2mm rubber ring x 1, 4mm rubber ring x 1