[en] The developments of ²⁰⁷Pb, ²⁰⁸Pb and ²⁰⁹Bi target wheels and their applications in heavy-ion fusion reactions are reviewed. In both, fabrication and use, the centers of the evaporator or accelerator beams are focussed at wheel radii of 155 mm to specially shaped frames which generate very homogeneous target layers and very constant reaction and counting rates in the experiment. Target areas of up to ∼98% of a wheel's circumference of 974 mm can be provided. The preparation procedures for necessary C backings and protecting layers of C are described, and details are given for the developments of high-vacuum evaporations of ²⁰⁷Pb, ²⁰⁸Pb and ²⁰⁹Bi with deposition yields of 35-55% from tantalum crucibles. The applications of the target wheels in heavy-ion fusion reactions with beams of ⁵⁴Cr and ⁵⁸Fe at energies near the Coulomb barrier and intensities of ∼10¹² particles/s are mentioned. The target parameters for the production runs of the new chemical elements ₁₀₇Ns, ₁₀₈Hs and ₁₀₉Mt are included. (orig.)