In this study, we investigate the metal-free magnetism in 24 triangulene dimers as well as their derivatives with various bridging groups, including -C≡C-, -C≡C-C≡C-, and phenyl linkages (Figure ). By using broken-symmetry density functional theory (DFT) calculations, we demonstrate that these dimers exhibit a broad spectrum of spin couplings from -0.05 meV to -128 meV, including many exceeding the Landauer limit at room temperature, such as triarylmethyl (TAM), trioxotriangulene (TOT) dimers. Our analysis of their spin-polarized molecular orbitals sheds light on the origin of the magnetic interaction, where the kinetic exchange dominates due to strong electronic coupling. Additionally, we establish a positive correlation between bandgap, electronic coupling, and AFM magnetic couplings, which serves as a promising strategy for enhancing magnetic interactions. Most importantly, we demonstrate that by twisting the dihedral angles between the monomer fragments, FM coupling of 1.5 meV can be achieved in nitrogen-doped triangulene dimers through a delicate balance of the potential and kinetic exchange. Our results deepen the understanding of the metal-free magnetism of triangulene dimers, and provide new avenues for the design of molecular-based magnetic materials as well as the regulation of their magnetic interactions.