RFX Race 13 Teeth Gearbox output pinionRef : RFX01228A / 1123290004

RFX Race Sprocket 13 Teeth (manufacturer part number: FXFS 57-13 55ST): front sprocket designed for the cross practice of small displacements. CNC machined from alloy steel and then carburized to 60 Rockwell, it meets the robustness and precision requirements demanded on track and off-road. Its 13-tooth design with a 415 pitch fits standard transmissions of mini and 50cc machines.

• Material: alloy steel, carburized and heat-treated
• Number of Teeth: 13
• Chain Pitch: 415
• Version: standard sprocket
• Color: silver
• Machining: CNC process with tight tolerances

Designed for off-road demands, this RFX sprocket provides a sharp chain engagement and controlled tooth geometry, suitable for repeated starts and abrasive conditions. Some RFX models come with lightening holes to reduce unsprung mass; check the manufacturer part number to confirm the variant.

Common compatibilities: KTM 50 SX MINI (2023), HUSQVARNA TC 50 MINI (2023), and KTM 50 SX (2023). Always check the pitch and number of teeth of your sprocket before ordering.