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青少年&儿童 BOOM-FD11AG
CRANK   LENGTH曲柄长度89 / 102 / 114   / 127 / 140 / 152MM
CHAINRING齿片32T / 25T
CRANK   MATERIAL曲柄材质FORGED AL-6061-T6
CRANK FINISH曲柄涂层SAND BLACK
B.C.D螺丝分布直径76MM
CHAINLINE链条中心线45MM
CHAINRING   MATERIAL齿片材质AL-7075-T6
CHAINRING   FINISH齿片涂层BLACK SAND ANO.
CHAINGUARD链盖ALLOY, BLACK SAND   ANO.
Q-FACTOR /   I-FACTOR曲柄后下叉距离154.5 / 127.5MM
B.B. TAPER   SQUARE四方孔轴心110.5MM

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