SPECIFICATIONS

NAME: 689-2RS
OUTER DIAMETER: 17mm
INNER DIAMETER: 9mm
HEIGHT: 5mm

Black Bearing radial bearings are machined and assembled to precise tolerances. They are offered in four material/build options to suit a broad range of applications at any budget.

These bearings are best suited to components that undergo continuous rotation - think hubs, bottom brackets, or any part that spins. While they can be used in suspension pivots, the full-complement MAX versions are best suited to this application for optimum load management and longevity.

 

B3 - CHROME STEEL

B3 bearings are ABEC-3 grade and deliver reliable performance at a sharp price. The quality is comparable to the bearings that are typically specified as original equipment (OE) from many component manufacturers.

• Chrome steel balls - SAE52100 - ABEC-3
• Chrome steel races - SAE52100
• Chrome steel cage
• 2RS seals provide water and dust resistance
• Premium quality grease

 

B5 - PREMIUM CHROME STEEL

B5 Bearings are ABEC-5 grade. They will upgrade the performance of many stock bearings, rolling faster and smoother with exceptional durability.

• Chrome steel balls - SAE52100 - ABEC-5
• Steel races - SAE52100 - with optmized internal design
• Chrome steel cage
• Reinforced 2RS seals for improved water and dust resistance
• Premium quality grease

 

B5 STAINLESS - STAINLESS STEEL

The bearing of choice for use in wet conditions. B5 Stainless bearings are highly corrosion-resistant, maintaining consistently smooth and fast performance under challenging conditions.

• Stainless steel balls - KS440 - ABEC-5
• Stainless steel races - KS440 - with optmized internal design
• Steel cage - AISI-304
• Reinforced 2RS seals for improved water and dust resistance
• Premium quality grease

 

CERAMIC HYBRID

Upgrade to Black Bearing Ceramic Hybrid bearings for ultimate performance. Premium silicon nitride balls have incredible durability and smoothness. These are precisely assembled into an ultra-low friction bearing unit optimised for competition and premium performance.

• Silicon nitride balls - SI3N4
• Steel SAE52100 / Stainless steel KS440 races with optmized internal design
• Polyamide cage with low friction
• 2RS low-friction seals for fast rolling while providing water and dust resistance
• Premium quality grease