Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Ball Material	Silicon Nitride Ceramic
Race Material	440C Stainless Steel
Small Bearing ID	32 mm
Small Bearing OD	35 mm
Small Bearing Width	4 mm
Large Bearing ID	51 mm
Large Bearing OD	58 mm
Large Bearing Width	4 mm
Seal Type	Non-Contact Rubber
Maintenance	Maintenance-Free

5 reviews

Anonymous

Mar 14, 2026

Rating: 5/5

Quiet Operation

No more grinding noise from the rear derailleur. Very happy with the silence and smoothness during shifts.

Anonymous

Feb 25, 2026

Rating: 5/5

Incredible Smoothness

Upgraded my derailleur pulleys and the shift quality is noticeably crisper. The ceramic bearings spin freely with almost no resistance.

Anonymous

Feb 21, 2026

Rating: 5/5

Durable Build

Survived a muddy cyclocross season without any issues. The seals are holding up well against debris.

Anonymous

Feb 04, 2026

Rating: 5/5

Worth the Cost

Expensive but the performance gain in wet conditions is real. No grit noise after riding through puddles.

Anonymous

Jan 30, 2026

Rating: 4/5

Great Product

Works as advertised. Installation required a press tool though, so factor that into your budget if you do it yourself.

5 FAQ

Q: Is there a warranty?

A: Yes, all bearings come with a 1-year defect warranty against manufacturing issues.

Q: What is the weight difference?

A: You save approximately 12 grams over standard steel bearings due to the ceramic balls.

Q: Are these compatible with SRAM AXS?

A: These are designed for the Absolute LBACK system. Please verify pulley cage compatibility before purchasing.

Q: Can I use a hammer to install?

A: No, please use a bearing press to avoid damaging the ceramic balls or the races.

Q: Do I need to lubricate them again?

A: No, they come pre-lubricated and are sealed for life. Additional lubrication is not recommended.

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