2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/182472We study Aichelburg-Sexl ultrarelativistic limits in higher dimensions. After reviewing the boost of D>=4 Reissner-Nordstrom black holes as a simple illustrative example, we consider the case of D=5 black rings, presenting new results for static charged rings.7 pages. Proceedings of Fourth Meeting on Constrained Dynamics and Quantum Gravity, Cala Gonone (Sardinia, Italy), September 12--16, 2005. To appear in Journal of Physics: Conference SeriesGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext