Yokomo B9-RTC-02A Compatible Lower Caster Block for MRTC-BD919 Series  [B9-RTC-02A]

Yokomo B9-RTC-02A RTC Aluminum Lower Caster block
Price:
£21.01
Brand:
Yokomo
Model:
B9-RTC-02A
GTIN:
0639342182732
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Spares / Hop-ups - Yokomo - MRTC-BD10FF category
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Compatibility and fit for BD9-series chassis

This aluminum lower caster block is an RC-scale replacement part intended for Yokomo BD9 2019 platforms, serving as the mounting base when fitting a rear RCT assembly. It forms the interface between the steering block and the suspension arm on supported chassis.

The metal block replaces the stock plastic lower caster to provide a stable mounting point that reduces deformation under load. In practice, this helps keep caster and toe geometry consistent when rear steering components are installed or adjusted.

Fitting the unit is straightforward: remove the existing lower caster from the suspension arm, fit the aluminum replacement and secure it with the original chassis fasteners. Confirm alignment and fastener torque after the first run to ensure the geometry remains correct.

Specifications

  • Item: Aluminum lower caster block
  • Material: Aluminum
  • Model Number: B9-RTC-02A
  • Compatibility: MRTC-BD919, MRTC-BD919S, MRTC-BD10FF

Compatibility

  • MRTC-BD919
  • MRTC-BD919S
  • MRTC-BD10FF

This lower caster block is recommended when a robust metal mounting point is needed for rear RCT installations on supported Yokomo BD9 series chassis to maintain steering geometry under load.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Which specific chassis models will accept this part?

The block is compatible with MRTC-BD919, MRTC-BD919S and MRTC-BD10FF chassis as listed; verify your chassis variant matches these designations before purchasing.

Can I swap this into older BD9 variants?

Older BD9 variants that share the same lower caster mounting geometry may accept the part, but confirm hole spacing and clearances on the suspension arm to avoid fitment issues.

Will this require any chassis modification to fit?

No chassis modification should be necessary for compatible models; the part is designed to use the existing mounting points. Always check hardware alignment and test fit before final tightening.

What should I check if the part feels tight or misaligned?

Inspect for misplaced shims, incorrect washer order, or swollen plastic components. Loosen fasteners, realign the block, and retighten to the correct torque while confirming free steering movement.

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