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青少年&儿童 BURNER-FD04SA
CRANK   LENGTH曲柄长度152 / 160 /   165MM
CHAINRING齿片40T / 38T / 36T / 34T   / 32T
CRANK   MATERIAL曲柄材质FORGED AL-6061-T6
CRANK FINISH曲柄涂层SAND BLACK
COMPATIBILITY变速兼容10S / 9S
B.C.D螺丝分布直径104MM
CHAINLINE链条中心线45MM
CHAINRING   MATERIAL齿片材质STEEL
CHAINRING   FINISH齿片涂层BLACK
CHAINGUARD链盖ALLOY, BLACK SAND   ANO.
Q-FACTOR /   I-FACTOR曲柄后下叉距离182.5 / 152.5MM
B.B. TAPER   SQUARE四方孔轴心110.5MM

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