About Truvativ Holzfeller OCT 1.1 Crankset: This is one of the best 7050 alloy and OCT hollow forge cranksets made, and of course, it's by URLE, who knows a thing or two about crank design. The technology used is a combination of best-in-class DH crank arms, which are 75 grams lighter in weight yet, amazingly, 10% stiffer than many other Truvativ cranks. It is claimed to be one of the strongest and lightest extreme-use crank sets available on the market now. Ride hard, ride extreme, throw what you want at this crankset. Material is Open Core Technology AL-7050-TV. Near bulletproof status results from the extrusion design, forging and heat-treatment processes. In these ways, Truvatic creates their pro-level Holzfeller OCT, Holzfeller, Omnium, Rouleur, and Stylo components. It's why the Holzfeller OCT crankset allows you double the pedal thread, accompanied with supreme bottom bracket interface strength.