Amperbike 18T Ceramic Jockey Wheel – AL7075 CNC Rear Derailleur Idler
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Lightweight 18T ceramic‑bearing jockey wheel designed for high‑performance MTB and road bike rear derailleurs.
- High‑strength AL7075 CNC‑machined aluminum alloy – durable yet light.
- Ceramic bearings: super‑lubricated, low friction, long life.
- Fits 4 mm, 5 mm, or 6 mm roller screw axis; compatible with 7‑11 speed systems.
- Easy install – replace original pulley with same or smaller size.
- Available in colorful finish; matches most rear derailleur models.
