Quick Summary
The eMagTech 10PCS Bicycle Ball Bearing set is a pack of 10 replacement bearings for bicycle headset and crank-related use. It is described as a metal bearing set with 40 mm outer diameter and 4 mm ball diameter, so the key buying check is whether those measurements match the bicycle bearing frame.
The set is stated for mountain bicycles and fixed gear bikes. It is also described as bicycle front fork ball bearings and as a replacement part, so it is worth confirming the exact fitting point on the bike before ordering.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | eMagTech – helps identify the exact replacement part family. |
| Quantity | 10 pieces – check that this matches the number needed for the repair. |
| Outer diameter | 40 mm – measure the bearing frame or housing before choosing. |
| Ball diameter | 4 mm – check this against the required bearing size. |
| Material | Metal – relevant where a metal bearing is required. |
| Intended fit | Mountain bicycles and fixed gear bike – confirm the exact application on your bike. |
What to Compare Before Buying
- Size: Compare the 40 mm outer diameter and 4 mm ball diameter with the bearing you are replacing.
- Quantity: This pack contains 10 pieces, so check whether that is enough for the repair you plan.
- Application point: The bearing is described for headset, crank and front fork use, so make sure the fitting point matches your bike.
- Bike type: It is listed for mountain bicycles and fixed gear bikes, so confirm your bike uses this bearing format.
What Is Included
- 10 bicycle ball bearings
Before You Decide
Check the 40 mm outer diameter, 4 mm ball diameter and the 10-piece quantity against the bearing you need to replace. Make sure the fitting point and bike type match before choosing an offer.
Common Buyer Questions
How many bearings are included?
10 pieces are included.
What should be checked before buying?
Measure the bearing frame and confirm the 40 mm outer diameter and 4 mm ball diameter match the part you are replacing.






