Every SPANK wheel is hand laced, tensioned, and trued, and receives several quality controls check, before the builder signs off on each wheel's build specification. SPANK wheels are hand - laced to the SPANK HEX DRIVE 102T Hub system, with 3.5 ° Engagement, and 6 Pawl, 18 contact point drive system. Utilizing the endless life cycle of aluminium, our proprietary alloy blends offer superior mechanical properties resulting in stronger rims and reduced weight through optimized design. From rim extrusion, through to final product, each rim is passed through twelve quality control tests. Processes such as extrusion, forging and tube drawing increase the strength of alloy materials by reducing the grain size. You'd be hard - pressed to find other alloy rims that are subjected to the number of drawing steps or level of refinement as those offered by SPANK IND. The unique OohBah profile allows us to manufacture thinner walled, wider profiled, lighter rims without sacrificing strength or rigidity. Wider rims mean stiffer wheels and more tires spread, leading to greater traction and improved comfort, and tire performance. The "wave" shape of the OohBah inner tube adds strength and support to the vertical rim flange walls and prevent buckling. Normal straight or curved tube wells must be much thicker, and by default heavier, to offer the same support. It is one of the main reasons so many describe our rims as ' bombproof ', while it also promotes easier tubeless inflation. SPANK INDUSTRIES BEADBITE is a unique design feature that optimizes set up for tubeless and reduces burps or pinch flats. Tire beads are locked in place between vertical and horizontal ridges. 12 sets of ridges on the vertical and horizontal walls create tiny air seals, improving retention. Vibrocore reduces negative vibration and increases lateral stiffness & torsional strength.