The Sidewalls are produced from a high elasticity and high strength rubber compound and offer excellent flexibility and therefore maximum flexing. The use of diagonal fabric for the reinforcement within the Sidewalls ensures maximum elongation of the fabric at the flexing points as well as increasing tensile strength, again increasing the life of the Sidewall The assembly lines for complete belts has also received new investments for maximum quality standards and higher productivity. The recently installed computer controlled roughening machine can precisely roughe the base belt automatically and to an exact depth, important in ensuring maximum bond strengths.