The article 'Performance of multicone synchronizers for manual transmissions' by N. A. Abdel-Halim, D. C. Barton, D. A. Crolla, and A. M. Selim published in Proc. IMechE, Part D: J. Automobile Engineering, 2000, 214(1), 55-65, DOI: 10.1243/0954407001527213 is incorrect. The following corrections apply:.