A system is disclosed which has a first camshaft coupled to a first gearwheel via a camshaft adjuster, the camshaft adjuster allowing the camshaft to be rotated with respect to the gearwheel, and a second camshaft fixedly coupled to a second gearwheel. The first and second gearwheels are coupled to a crankshaft via a belt or a chain. The camshaft adjuster is fixed to the first camshaft by a first fastener; the second gearwheel is fixed to the second camshaft by a second fastener. The fasteners are arranged at substantially the same depth, as assembled. The fasteners may be screws, adhesives, or welds. The second gearwheel includes: a gearwheel body having teeth, a disk-shaped body, and a spacer between the gearwheel basic body and the disk-shaped body, by which the axial length of the spacer causes the depth of the first and second fasteners to be substantially equivalent.