This Kyosho UBW008 front suspension arm is an RC-scale replacement produced from carbon composite, intended for use on assemblies identified by the RB7.5 designation. It is supplied as a swap candidate for front suspension assemblies where RB7.5 parts are required, and is described strictly as an aftermarket replacement for those layouts.
As a structural suspension element, the arm alters both static geometry and dynamic reaction. Before fitting, confirm hinge-pin spacings, mount boss positions, and any track width differences on your chassis. Even small offsets in arm length or hole placement will change camber and steering response, so plan changes incrementally.
Fitting follows routine front-arm replacement practice: remove the wheel and hub carrier as necessary, unbolt the old arm at hinge and steering mounts, move any pins or bushings to the new arm if needed, then reassemble and check for unrestricted movement through full travel. After refit, check wheel alignment and bearing seating and run the suspension through slow cycles to detect binding.
When setting up, use the arm for subtle camber and toe changes rather than major jumps. Inspect mount points periodically for wear and check fasteners after initial runs. Because this is carbon composite, apply clamp forces carefully to avoid crushing or delamination at the bolt interfaces.
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