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Shimano sg s505 alfine di2 internal hub gear 8 speed
shimano sg s505 alfine di2 internal hub gear 8 speed
Shimano sg s505 alfine di2 internal hub gear 8 speed
Internal geared hub for di2 electronic specification wider gear ratio with lighter weight gear ratio 306 silent clutch gear change support mechanism longer durability by oil lubricant weight 1680g

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