Quick Summary
This 30-piece bike ball bearing assortment kit includes fixed-cage bearings in 10 sizes from 4 mm to 8 mm. It is a bicycle repair and maintenance kit for BMX, mountain bike, and road bike work.
The fixed cage design keeps the balls spaced in each bearing. That makes the kit easier to sort by size when you are working on different repair jobs.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Quantity | 30 pieces, so the kit covers multiple repair jobs. |
| Sizes | 10 sizes from 4 mm to 8 mm, which helps match the bearing size needed for the repair. |
| Design | Fixed-cage ball bearings, which keep the balls spaced in the bearing assembly. |
| Intended use | Bicycle repair and maintenance for BMX, mountain bike, and road bike applications. |
What to Compare Before Buying
- Bearing size: Compare the needed bearing size with the 10 sizes in this kit, especially if you are replacing an existing part.
- Application: Check whether the repair involves headsets, bottom brackets, or wheel hubs, since those are the uses named here.
- Quantity: The pack includes 30 pieces, so compare that with the number of bearings you expect to replace.
- Design: Fixed-cage bearings are different from loose-ball bearings, so confirm the format you want for the repair.
Compatibility, Size and Fit
This assortment is aimed at BMX, mountain bike, and road bike repair work. It covers bearing sizes from 4 mm to 8 mm. If you are matching a replacement, compare the size you need against the specific bearing size in the kit before choosing an offer.
Before You Decide
Confirm the exact bearing size, the 30-piece quantity, and the fixed-cage format before choosing an offer. If your repair calls for a different bearing style or a size outside 4 mm to 8 mm, a different kit is the better fit.









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