The Altor private equity group has signed an agreement to acquire a majority stake in independent tire distributors Gummigrossen and RengasDuo from their founders, including Mats-Ove Eriksson, Torsten Pettersson and Magnus von Haartman. According to Altor, the founders will remain “significant shareholders” and continue in their respective operational management roles. Gummigrossen does business in Sweden, and RengasDuo does business in Finland.