The Yokomo B9-501MCSA Steel Spool Drive Cup is manufactured from hardened steel to withstand frequent use on a BD9 2019 chassis. It maintains efficient drivetrain function and is suited to several Yokomo models.
Designed to resist wear, the spool delivers steady power transfer and reduces the need for constant adjustments. Its robust profile is appropriate for competitive environments and regular hobby running alike.
This spool is made for BD9 2019 but also supports other Yokomo chassis types, such as MRTC-BD919, MRTC-BD10, and MSR-BD12 series. That compatibility makes it useful when servicing multiple cars.
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