JXR 49T Black Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer

JXR 51T RED PRO Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer

JXR 47T Red Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer

JXR 50T RED PRO Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer

Supersprox Stealth RST‑210‑49 Rear Sprocket – 49T, 520 Pitch, Red, Dual‑Material

JXR 49T Red Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer

JXR 48T Red Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer

JXR 52T Red Rear Sprocket for Beta 125 - 500 RR Racing X-Trainer