Description
Replacement freehub driver body for Onyx Racing Product hubs employing the MFU axle design (modular freehub units).
- Compatible with all Vesper hubs, and Classic hubs using the MFU axle.
- 6 models: Shimano HG, Shimano HG (chromoly), Shimano Micro Spline, Shimano Micro Spline (chromoly) Sram XDR, Sram XDR (chromoly).
- All listed widget/endcaps are compatible with the following hub spacing standards:
- MTB – 142x12mm.
- Boost – 148x12mm.
- Super Boost – 157x12mm
- FAT – 177x12mm
- FAT 197x12mm
- Ask for availability by email for endcaps compatible with other hub spacing options: info(at)onyxhubseurope.com
Endcap Compatibility
When purchasing a new freewheel driver body, it is essential to verify driveside endcap compatiblility
| Freehub driver body standard | Driveside Endcap Type |
| Shimano HG | Type 1 |
| Sram XD(R) | |
| Shimano Micro Spline, and Campagnolo N3W. | Type 2 – marked with the “Micro Spline” engraving |
In other words, the same driveside endcap can be used with both Shimano HG and Sram XD(R) freehub driver bodies. The Shimano Micro Spline (the newest 12-speed standard) and the Campagnolo N3W requite a different type of endcap. Choose “Yes” or “No” based on the circumstances.
- Sram XD drivers are not included in the Onyx RP lineup. XD cassettes can be run with an XDR driver by installing a 1.85mm spacer under the cassette. The spacer is included in the delivery with all XDR drivers.
- Chromoly freewheel driver bodies are the strongest and most durable option out there, but come with an addittional weight of approx. 50-60g. These variants are recommended for especially heavy applications such as e-bike or single-speed use. Vesper hubs use aluminium drivers in all applications.
- Ensure compatibility by email, if needed.
Read more about the differences between XD and XDR drivers in the article below.
Learn more about driver material choices here.
Onyx Freehub Driver Material – The Choice Between Steel and Aluminum
