The offer in rims in Koga Signature® is expanded:
The new Koga KM19 Xlite rims, made by Exal, are lighter and narrower than the KM21 Xstrong, but nevertheless still particularly strong. These rims are double-eyeletted; that means that the eyelets, into which the spokes are fastened, run through both rim walls. The eyelets are also oriented to the direction the spokes run, so that unwanted stresses in the wheel structure are minimised, making for a longer lasting wheel.
These aluminium alloy rims have an anodised layer, an extremely hard surface which practically eliminates corrosion.
If you have decided on the Shimano Deore XT groupset, then a especially robust rear wheel with 40 spokes is fitted automatically. All of the other Shimano groupsets have wheels built with 36 spokes.
If you have decided on the Rohloff hub gear transmission, you will receive a wheel built with 32 spokes, in this case consisting of a Koga EX19 Xstrong rim (These rims are punched at an angle and therefore especially suitable for the Rohloff hub). Fewer spokes are required with the Rohloff hub, because the hub's symmetrical design ensures more even stress distribution than is found in the derailleur rear wheels it replaces.