CeramicSpeed 61903 (6903) bearing - 30x17x7

CeramicSpeed 61903 bearings are designed to improve the performance of your wheels. They feature CeramicSpeed balls that are 400% smoother, 128% harder and 58% lighter than standard steel bearings. As a result, they significantly reduce friction, ensure better power transfer and offer exceptional durability. You can use these bearings on the road, on the track or for mountain biking.

To ensure these bearings are compatible with your wheels, remove the bearings currently fitted to your hubs and measure the various dimensions using a calliper.

TECHNICAL SPECIFICATIONS:

- Inner diameter: 17 mm
- Outer diameter: 30 mm
- Width: 7 mm
- Grade 3 silicon nitride balls
- Hardened steel bearing rings with an ultra-smooth polished groove
- Reinforced polyamide cage
- Water- and dirt-resistant non-contact seals
- Special blue ceramic grease
- 4-year warranty
- Manufactured and optimised in Denmark
- Brand: CeramicSpeed