The AR28 has been revised and will have as main characteristic the adjustment of the rear in three different positions. It will have, as series, the new 'C' of spindles for housing the eccentric bushing for a better adjustment of camber & caster as in the 'Racing' models. Starting from the S18 models, also for this racing season we have conducted an important development activity aimed at optimizing the overall performance of the kart. The intervention has involved the evolution of the frame geometry, using new materials with improved mechanical characteristics and revising of some accessory components. New technical details have also been introduced, projected to increase the products dynamic efficiently and construction quality of the products.