Abstract
This study is part of an investigation concerning the possibilities to reduce the road wear from studded tyres. One task was to analyse the consequenses of more stringent rules for the configuration of studded tyres. To be able to do this it was necessary to study the status of the present studded tyres. The study which for this purpose was done has been divided into two parts. One part is a laboratory investigation of stud parameters measured on new and worn studded tyres. The other part is a field study concerning tyre qualities of randomly chosen vehicles in traffic. (A)