61903 (6903) (17 x 30 x 7mm)

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AITA hybrid ceramic bearings are designed to perform and made to last. It only consumes 20% of the power compared with the steel bearing.
As one of the Australian owned ceramic bearing brands, we design the bearings for sports and check each bearing by hand before shipping it to you.

It is always not easy to find the right bearings to match your current ones but with AITA, we provide the bearing code, which normally can be found on your current bearing rubber seals such as  61903 -RS or 6903-RS; RS stands for rubber seal. 

The bearing's actual size is measured as Inner Diameter (ID) x Outer Diameter (OD) x Width (W) in mm.

For instance, a 61903 (6903) bearing size is ID 17mm x OD 30mm x W 7mm

All AITA ceramic bearing comes with a 2-year warranty.

Specifications:

ABEC7 high chrome vacuum degassed bearing steel races with quenching and tempering hardening;

Ultra-smooth polished bearing raceway;

Low friction ceramic grease minimises the friction and increases bearing life;

Light-contact rubber seals keep dirt and moisture out; 

Grade 3 Si3N4 ceramic bearing balls;

C3 clearance;

Used for Road, TT, Tri, Cross, MTB and Track
 

If you have any questions, please send us an email: info@aitaceramic.com, one of our bearing specialists will assist you.