Fitted from the factory, the BETA FORK TUBE ASSY (OEM 037.33.060.00.00) is Beta’s original Swing Arm/Rear Suspension component for the RR 350 4T X-PRO, RR 390 4T X-PRO, RR 430 4T X-PRO, RR 480 4T X-PRO (2025–2026). It keeps your Beta performing exactly as the factory intended. Replace it as part of normal maintenance or after wear. An orig...