ST Racing Concepts 17mm hex adapters have now become the standard in 1/8th truggy racing scene, with the best combination in strength and weight between the stock 14mm hex and the overweight 23mm hex adapters. The ST Racing 17mm hex adapter conversion kit allows Traxxas Revo 3.3, T-Maxx 3.3 and the new E-Maxx and E-Revo owners to bolt on the latest truggy rims and tire combinations. Featuring captured drive pin design and light weight CNC machined wheel nut, this is a must have for all serious racers of Traxxas monster trucks.