The XRAY 353116 XB9 Hard Composite Rear Suspension Arm is built to keep rear geometry steady when the track heats up. Using a harder composite mix, this arm lowers flex and offers a firmer rear platform for drivers chasing consistent lap times.
XRAYs hard arm compound resists softening under high temperatures so the suspension stays predictable. That extra stiffness improves track holding but can be less forgiving after big hits.
By extending the rear arm length, the design smooths transitions and promotes more stable rear traction, which helps on corner exits and fast lines.
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