From now on, all Boost-sized Classic MFU hubs – excluding single-speed specific HGSS models –can be upgraded with widgets in colour of choice!
Widgets – What Are Those?
Widgets are used as an acronym for the front and rear endcaps and associated bearing lockrings. In the case of Classic front hubs, the structure is such that the axle creates the interface with the fork without any additional endcaps.
The widget type and associated parts are summarized below based on hub model.
| Classic (Boost) | Vesper (Boost) | |
| Front | Thru-bolt axle and a 25mm bearing lockring | Endcaps |
| Rear | Endcaps and a 17mm bearing lockring | Endcaps, the non-driveside endcap employs the in-built bearing preload mechanism |
Considerations
When it comes to choosing endcaps (or widgets), it’s important to ensure compatibility. The following three considerations are best to keep in mind.
- The rear driveside endcap is specific to the freewheel driver body type used.
- Shimano HG and Sram XD(R) drivers use the same type of endcap.
- Shimano MS and Compagnolo N3W drivers use an endcap of their own.
- Endcap type is dependent on the brake rotor interface, and thus hub shell model. Boost-sized Classic CL rear hubs use identical endcaps to the Vesper hubs (ISO and CL) whereas the Classic ISO hub use their own type.
Compatibility between different hub and hub shell models is shown in the table below. Models sharing compatible parts are listed in the same line.
| Dedicated endcap or axle type | |
| Front (Boost) | Classic CL |
| Classic ISO | |
| Vesper CL & Vesper ISO | |
| Rear (Boost) | Classic CL, Vesper ISO & Vesper CL |
| Classic ISO |
The Finishing Touch
When purchasing a set of Boost-sized Classic hubs, one can upgrade the widget colour by choosing from the multiple options on offer to get a pair of hubs that will turn heads – in addition to providing class-leading performance!
Front axles, and rear hub endcaps are also available separately.