RFX Pro Series Elite Aluminum Sprocket - 420 (manufacturer part number: FXRS 15-49 99BK): a sprocket designed for off-road use. Machined from 7075 aluminum using CNC milling and anodized black, it is aimed at motocross riders looking for a lightweight, precise component suitable for muddy conditions.
- Material: CNC machined 7075 aluminum for a good weight/stiffness compromise.
- Number of teeth: 49 teeth — 420 profile suitable for lightweight motocross transmissions.
- Finish: black anodization with laser-engraved RFX logo.
- Integrated mud evacuation grooves to limit accumulation and contribute to the longevity of the chain and sprocket.
- CAD-designed profile with tight tolerances for a precise fit on the hub.
- Stiff design aimed at reducing deformation during intensive use.
Designed for motocross use, this sprocket fits models equipped with a 420 chain. It is offered in color code according to brands and available here in black for a discreet and durable look on your motocross bike.
Common compatibilities: HONDA CRF 150 R (2026), CRF 150 R Big Wheels 16/19 (2022), CRF 150 R Std Wheels 14/17 (2020).
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