This aluminum rear knuckle arm set is an RC-scale replacement part designed for TAMIYA Hotshot and Super Hotshot chassis. It is intended to offer a firmer mounting point compared with typical plastic components, and to serve as a straightforward upgrade when adjusting rear suspension geometry for handling experiments and track setup.
Compatibility is limited to the Hotshot and Super Hotshot families as stated, so check your chassis layout before installation. The parts use the same mounting positions as the original rear knuckle arms, allowing you to reuse existing hardware and linkage when appropriate. No assumptions are made about supplied fasteners.
Installation notes: remove the rear hub carriers and original knuckle arms, fit the aluminum arms to the upright and secure using your chassis’ existing screws and ball studs. Tighten to a torque appropriate for small-scale RC hardware to avoid thread damage. After fitting, verify wheel alignment and suspension movement through the full travel range before running.
Tuning role: replacing the stock rear knuckles with aluminum components helps provide a consistent pivot surface for toe and camber adjustments, making it easier to compare setting changes during development runs. Use these arms as part of coordinated changes to shock tune, roll center, and anti-squat settings rather than as a single fix.
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