KHE sent some details on their
Erlkönig crank which we didn't really mention here so far: "This three piece crankset combined the special
Fluted (different wall thickness) CrMo Arms with an extreme reliable
hollow CrMo axle. This axle contains a larger drilling for a larger decrease in weight without a decrease in strength. The 48splined KHEbikes Erlkönig crank is available in two lengths
160mm (for Flatland) and 175mm (for Street Park and Dirt)."