Enduro's Zero pulleys are the step up from its standard ceramic hybrid range: precision-machined Delrin wheels running black-oxide treated ceramic hybrid bearings for better shifting and a longer life. This 11-tooth upper and lower set is designed as an upgrade for most 11-speed Shimano rear derailleurs.

Highlights

• Zero ceramic hybrid bearings: black-oxide treated 52100 steel races with Grade 5 silicon nitride balls
• 90% fill of high-pressure, waterproof grease
• CN (tight clearance) bearing in the upper pulley for shift accuracy, C4 (loose clearance) in the lower for chainline movement
• 500 AF Delrin with Teflon: less drag than aluminium or titanium pulleys
• 11-tooth upper and lower pulleys with 5mm bolt holes
• Precision manufactured in the USA

Zero ceramic hybrid bearings

Enduro Zero bearings pair black-oxide treated 52100 high-carbon chromium races with Grade 5 silicon nitride (Si3N4) ceramic balls and a 90% fill of high-pressure, waterproof grease. The ceramic balls reduce bearing wear and extend bearing life by eliminating steel-on-steel contact, and the black oxide (magnetite) treatment adds an extra level of corrosion resistance.

Machined 500 AF Delrin

500 AF Delrin has high tensile strength and rigidity, natural lubricity and strong resistance to moisture, caustic chemicals and UV, so the pulleys stay durable, rigid and smooth. Its Teflon content cuts friction where the pulley meets the chain, giving significantly less drag than aluminium or titanium pulleys. Enduro makes its pulleys at three levels (ceramic hybrid, black-oxide Zero ceramic and XD-15 ceramic hybrid at the top), all precision manufactured in the USA.

Compatibility & fit

Designed as an upgrade for most 11-speed Shimano rear derailleurs. Check your derailleur model, speed and pulley bolt sizes before ordering. Our Marrickville workshop can fit the pulleys and check your derailleur adjustment while it's apart. Fitting is a separate workshop service and isn't included in the price.