UltraFront SL2 59gr.

Nothing is "mini", everything is oversized: axle, bearings, flanges.


Weight: 59gr.

Material: special 7075TX.

Bearings: 2RS sealed cartdrige.

Micro-Tuner: quickest bearing preload system.

Finishing: "hart coat" sides, black anodized body.

Construction: 17mm oversized hi-engineered axle.

Graphics: laser etched.

Optional: HDC-Hybrid-ceramic bearings.

Download user manual

Dimensions for wheel building:

Avaiable drillings
28 - 32

Center to flange

int. 34mm, ext. 37mm
Flange diameter (spoke drilling)
43mm (34mm)

Spoke hole diameter



Radial lacing is allowed on internal and external flange side and only with D/B spokes (central section equivalent to Ø 1.5mm).

Micro-tuner allows an easy and quick bearing preload adjustment, no-tools required!

Flanges recive our new special treatments (military standard) to handle radial lacing stress.

To minimize torsional static forces flanges self-align under spoke lacing tension.


FEM: every single cubic mm recives hours of finite element analysis. UltraHubs axles and mechanism have been designed to handle any X-C racing abuse.

As every Extralite products UltraHubs exceede UNI/DIN Safety standards. Safety tests simulate a very strong 90kg (200lb) rider output.


100% made in Italy