The Yokomo YOKIB41312 aluminium lower caster block is a direct-fit RC-scale replacement part specified for DRB and DIB chassis, offering a fixed 12° lower caster geometry in a machined aluminium alloy with blue finish. It is intended to change suspension pivot stiffness and steering roll centre characteristics on 1/10 scale touring cars without altering other steering components.
Installation is straightforward for experienced model builders: remove the applicable steering knuckle or hub carrier, swap the stock lower caster block for this aluminium unit, and refit fasteners to the original mounting points. No special tools are required beyond standard hex drivers and a secure setup stand; confirm thread engagement and suspension geometry after installation before track use.
From a tuning perspective the aluminium lower caster block stabilises suspension behaviour under load compared with softer materials, and its 12° geometry provides predictable caster response useful for mid-to-high traction track layouts. The blue anodised surface reduces visible wear and helps with quick visual checks during setup changes.
This aluminium lower caster block is suited for modelers wanting a durable 12° lower caster option for DRB/DIB chassis to refine steering feel and suspension consistency during tuning sessions.
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