XRAY X4-2026 CFF2 Rear Lower Arm - Medium - Right XR-303186-M

This medium compound rear lower arm is what you reach for when the track has decent grip but you still want some compliance in the rear end. It's the right side arm for the XRAY X4 2026, and it uses their CFF2 carbon fiber reinforced material that holds up really well to the kind of abuse racing dishes out.

Medium compound sits right in the sweet spot for most indoor carpet tracks and higher grip asphalt. You get enough flex to keep the rear planted through sweeping corners without feeling vague or disconnected. The arm still has plenty of structure to support aggressive driving, but it won't fight you when the chassis needs to work over bumps or transitions.

What makes this arm useful is how it lets the suspension do its job. On tracks where a hard arm would skip or push, the medium compound keeps the tire loaded and working. You'll notice it most in long corners where maintaining momentum matters more than pure rotation. The right side positioning means it's handling specific loads during cornering, and the geometry is matched exactly to the X4 2026 bulkhead mounts.

Installation uses the same hardware as any other X4 suspension arm. If you're swapping compounds to tune for track conditions, it's a quick change that can make a real difference in how the car behaves. The CFF2 construction keeps weight reasonable while giving you the durability to run a full race weekend without worrying about failures.