BD9 Rear RCT Lower Caster Block B9-RTC-02A for Yokomo  [B9-RTC-02A]

Yokomo B9-RTC-02A RTC Aluminum Lower Caster block
Price:
AUD$40.93
Brand:
Yokomo
Model:
B9-RTC-02A
GTIN:
0639342182732
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Or you may find similar product under the
Spares / Hop-ups - Yokomo - MRTC-BD10FF category
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Tuning-focused lower caster block for BD9

This aluminum lower caster block is an RC-scale replacement part intended for Yokomo BD9 2019 platforms, acting as the mounting base for rear RCT steering. It creates a firmer connection between the steering block and the suspension arm to support precise adjustments.

Replacing the stock plastic lower caster with this metal unit increases structural rigidity, which helps the car hold caster and toe settings under dynamic loads and during setup changes. That stability makes small tuning adjustments more predictable on-track.

To fit, remove the original lower caster from the suspension arm, locate the aluminum block, and refasten with the chassis hardware. After installation, recheck your steering geometry and perform a short test to confirm handling changes before final tuning.

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

Fit this lower caster block when you want a stable metal mounting point that sharpens steering response and keeps geometry consistent for tuning on Yokomo BD9 chassis.
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.

How does the aluminum block affect handling feedback?

The increased stiffness reduces flex at the mounting point, delivering crisper steering inputs and more consistent toe and caster during cornering. Expect more repeatable responses to incremental setup changes.

Should I alter my setup after installing this part?

Small adjustments may be needed since the metal block changes how loads transfer through the rear end. Reassess toe and caster and run a tuning session to dial in settings to the updated stiffness.

Does it affect sensitivity to shock and suspension changes?

Yes, because the mounting point is firmer, suspension and damping changes can feel more direct. Tweak spring and damper settings as necessary to balance the altered response.

Is there any recommended procedure for tuning after fitment?

Start with baseline settings, run a few laps to note changes, then make conservative adjustments to toe, camber, and damping. Re-evaluate handling after each change to isolate effects of the new mounting stiffness.

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