Swiss Category C Theory (Truck) Practice Questions - Switzerland Driving Theory Test - Category C (Heavy Motor Vehicles) Exam

Deepening the tread grooves in the remaining tread base rubber on tires explicitly marked 'REGROOVABLE' by the manufacturer, strictly performed by trained professionals according to factory depth specifications Carving new decorative artistic shapes on the tire sidewall Retreading by applying hot liquid glue to bald tires Drilling holes in the tire to reduce weight