MEROCA 18T Ceramic Bearing Rear Derailleur Pulley – Hollow Eccentric Jockey Wheel, Black / Purple

MEROCA 18T Ceramic Bearing Rear Derailleur Pulley – Hollow Eccentric Jockey Wheel, Black or Purple

Refresh a compatible bicycle rear derailleur with the MEROCA CGW01 18T pulley. Its hollow eccentric design combines an aluminum alloy structure, ceramic bearing construction and a 28g net weight. Choose Black or Purple, and check the 73mm diameter, 5mm mounting hole and cage clearance before ordering.

Product highlights

• 18T deep tooth profile: designed to support chain engagement in a compatible rear derailleur setup.
• Ceramic bearing construction: sealed bearings with ceramic balls support smooth pulley rotation.
• Hollow eccentric layout: an open-center design with an offset mounting position and a stated net weight of 28g.
• Aluminum alloy with an anodized finish: choose a Black or Purple center with a black toothed outer ring.
• Check fit before ordering: supplier-listed for 9–12-speed applications; confirm the 73mm diameter, 5mm mounting hole and clearance for your specific derailleur.

Specifications

An open-center detail for your drivetrain

The MEROCA CGW01 brings an 18-tooth pulley and a distinctive hollow eccentric design to compatible rear derailleur setups. The open center keeps the appearance minimal, while the offset mounting position distinguishes it from a conventional centered jockey wheel. Black offers a subtle finish; Purple adds a contrasting accent.

Ceramic bearings and a deep tooth profile

The supplier specifies sealed ceramic bearing construction with ceramic balls, paired with an aluminum alloy structure. Deep tooth shaping is intended to support chain engagement. These are product design features; actual drivetrain feel depends on fit, adjustment and maintenance.

Compatibility and installation

The supplier lists 9–12-speed compatibility. Speed count alone does not establish fit: compare the mounting hole, outer diameter, pulley position and available cage clearance with your derailleur. Follow your derailleur manufacturer's installation and adjustment instructions, then check chain routing and free movement before riding.

Choose your color

Select Black or Purple under Option. Each color option is one pulley; the two colors shown together illustrate the available choices. The derailleur, chain and bicycle shown in installation images are not included.

Weight information

The stated product net weight is 28g. Shipping weight is calculated as 128g, including the standard 100g packaging allowance.