Swap your wheelset - what’s really compatible with your bike?
Want to replace your wheelset and unsure whether it will fit? Read this. In 2–3 minutes, you'll clarify the key points - without a bad purchase.
- Identical wheel size
- Axle spacing fits (Boost / Non-Boost)
- Freehub body compatible (Shimano / SRAM)
- Brake rotor fits or can be adapted
- Internal width suitable for tire width
1. Wheel size - basic requirement
The wheel size must always match.
- 27.5 inches (MTB)
- 29 inches (MTB)
- 28 inches (road bike / gravel)
You can find the specification directly on the tire (e.g. 29 x 2.3).
If the size doesn't match, the wheel won't fit.
2. Axle spacing - the most common mistake
This determines whether the wheel fits your frame.
- 148 mm strong> → Boost
- 142 mm → Non-Boost
Common at the front:
- 12x100 mm
- 15x110 mm (Boost)
Measure your current wheel from outer edge to outer edge.
Boost and Non-Boost are not compatible.
3. Freehub body - does your cassette fit?
The freehub body determines which cassette you can use:
- Shimano HG (left)
- Shimano MicroSpline (center)
- SRAM XD (right)
The easiest way: compare them visually.
4. Brake rotor mount - not a dealbreaker
There are two systems:
- 6-bolt
- Centerlock
This is not a dealbreaker. Adapters are inexpensive, and many people replace the rotors anyway.
5. Internal width - often underestimated
The rim's internal width determines which tire width is suitable.
Internal width vs. tire width
| Rim internal width (mm) | Tire width (mm) | Tire width (inches) |
|---|---|---|
| 15 | 20– 27 | 0,79–1,06 |
| 16 | 20–34 | 0,79–1,34 |
| 17 | 20–57 | 0,79–2,24 |
| 18–20 | 22–57 | 0,87–2,24 |
| 21–22 | 25–65 | 0,98–2,56 |
| 23 | 28–65 | 1,10– 2,56 |
| 24 | 29–65 | 1,14–2,56 |
| 25 | 29–71 | 1,14–2,80 |
| 26–27 | 35–71 | 1,38–2,80 |
| 28– 30 | 47–71 | 1,85–2,80 |
| 31–35 | 58–83 | 2,28–3,27 |
Source: Schwalbe
Tires that are too narrow on a wide rim = unstable handling. Tires that are too wide on a narrow rim = squirmy. Stay within the recommended ranges.
Common mistakes when buying a wheelset
- Axle spacing not checked
- Wrong freehub body
- Tires don't fit the rim
- Brake rotor overrated
Conclusion
Wheel size + axle spacing + freehub body are crucial. If those fit, the rest can usually be sorted out.