6003-ZZ-C4 Hybrid
6003ZZ C4 Hybrid Ceramic Kart Wheel Bearing
- Size
- 17 × 35 × 10 mm
- Fits
- Kart wheel hubs / 17 mm spindle
IATF 16949 CertifiedSince 2011 · Jiashan County, China
OTT 6003 is a compact 17 mm-bore kart wheel bearing (17×35×10 mm). The steel version has carbon-nitrided races and balls — a hard, wear-resistant surface over a tough core that resists pitting and shock loads — and is pre-filled with kart-specific grease. Non-contact ZZ metal shields keep drag to a minimum and deflect larger debris, making them the right choice for clean, dry track conditions. A hybrid ceramic version with Japanese-made Si₃N₄ balls and low-contact rubber seals is also available for teams chasing lower rolling resistance.
Technical data
| Model | 6003 |
|---|---|
| Inner Diameter | 17 mm |
| Outer Diameter | 35 mm |
| Width | 10 mm |
| Heat Treatment | Carbon-nitrided races and balls |
| Lubrication | Kart-specific high-performance grease |
| Versions | Steel ZZ (non-contact metal shields) / Hybrid ceramic with low-contact rubber seals |
Fitment note: cross-references and vehicle applications are for identification. Send us the OE number, VIN or a sample and we will confirm the exact fitment before you order.
Available in OTT branded packaging or custom OEM packaging. Individual bearings are sealed in PE bags, packed in branded carton boxes, then palletized in wooden crates for export shipping.






Other versions
Same size, different build: steel ZZ for clean, dry tracks; hybrid ceramic C4 for lower rolling resistance. Not sure which one fits? See where each bearing goes in a kart.
6003ZZ C4 Hybrid Ceramic Kart Wheel Bearing
Same product line
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Share an OE or competitor number, a drawing or target dimensions and your annual volume. Samples available for qualified projects.