[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

购买前必须先测量坐垫弓(rail)截面:公路车/山地车多为7×7mm圆钢弓,中高端车型常见7×9mm椭圆钛/碳弓,两者夹片凹槽形状不通用,买错会夹不紧或压裂碳弓

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