Internal locking system: Included are low-profile lockrings and TITANIUM bolts!
Colour: Black, White
Weight: 120g "Thanks to its low-profile design and titanium components, the Tharsis is noticeably light, but doesn’t skimp on performance. The tapered shape gives a good riding feel and the use of an internal locking system at the outer edge rather than a clamp means there's no hard edge." Bikeradar.com