The EC34/28.6 is the classic 1" headset bearing standard, found on track bikes, vintage road frames, many fixed-gear builds, and some current commuter bikes. Our ceramic replacement brings Grade 3 silicon nitride balls and DLC-coated races to platforms that rarely see ceramic upgrades — and the smoother steering and extended life are just as valuable here as on a $10,000 race bike.
What You Get
- ✓ Grade 3 Si₃N₄ ceramic balls — reduced steering friction from ride one
- ✓ DLC-coated chromium steel races for extended bearing life
- ✓ ABEC-7 precision tolerances for smooth, play-free steering
- ✓ Matched pair: upper and lower bearings included
- ✓ Compatible with both threaded and threadless 1 inch systems
Technical Specifications
| Includes |
2 bearings |
| Seal Type |
Integrated contact seals |
| Tolerance |
ABEC-7 |
| Fork Steerer |
28.6mm (1 inch threaded or threadless) |
| Expected Life |
20,000–35,000 miles |
| Race Material |
52100 Chromium Steel, DLC Coated |
| Bearing Material |
Grade 3 Silicon Nitride (Si₃N₄) |
| Bearing Standard |
EC34/28.6 |
| Headtube Diameter |
34mm |
Compatibility
1 inch threaded headsets (most steel road bikes, track bikes)
1 inch threadless headsets
Vintage road frames
Track and fixed-gear frames
Some steel gravel and touring frames