Rolf prima elan es disc clincher rear road wheelrolf primas elan es disc clincher rear road wheel is an alloy training wheel that will help you train with comfort and reliability without a weight penalty throw in the supreme stopping power of a disc brake and youll be surprised by the impressive performance of this elan es disc wheel elan es disc clincher light and versatile alloy training wheelthe elan es clincher front wheel is modestly light for an alloy training wheel at 895 grams aerod