The MAG 170 is Tune's latest iteration of their lightweight rear road hub design. When compared to its predecessor, the MAG 180, several key improvements become apparent. The most dramatic change is the move from a 15 mm axle to a 17 mm aluminum axle. This increse in diameter helps to save weight while incresing the stiffness of the hub assembly. In order to accomodate the larger axle size, Tune had to redesign the rest of the hub. The hub shell itself has slightly increased in diameter, along with the drive mechanism. And in redesigning the hub shell, Tune opted to improve the flange spacing for better spoke bracing angles, ultimately leading to stronger, laterally stiffer wheel builds.

Internally, each bearing has been effectively downsized to save weight and to fit the larger axle. Tune has also opted to abondon its XOT double bearing and preload mechanism, which greatly simplifies axle removal and hub overhaul.


Specifications
Weight 170 grams
Bearings 6803 (1), 6903 (1), 6803 (2)
Axle Diameter 17 mm
Available Drillings 24, 28 hole
Hub Shell Material 7075 aluminum
Use road, cyclocross

Wheel Building Dimensions
Left Flange Diameter 41 mm
Right Flange Diameter 54 mm
Left Flange to Center 36.0 mm
Right Flange to Center 18 mm