SHIMANO XT 中心盆-BB-MT800 / SHIMANO XT B.B-BB-MT800

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-Improved driving rigidity

-Close ratio gear combination for minimum shifting gap and maintaining rhythm

-Enhanced chain retention

-Better sealing and better rotation

-Various choices for bike and riding style

-More durable chainwheel teeth

-New 3D composite chain ring's teeth composition is optimized for each chainwheel --load out with steel driving gear teeth and aluminum support gears

-Average weight: 68.2 g