Bicycle Helmet Giro Tremor When every curb turns into a ski jump, and every patch of earth screams for a skid, the tremor is the helmet that holds the corners of the mouth up, even if it hits its limits for the time being. Some of the best technologies in the adult line, such as in-mold construction and our popular Roc Loc Sport system, provide versatility, comfort and the comprehensive customization that young drivers need to be confident. And with lots of great colors to choose from, you'll find the one that makes every tour even more exciting and the joy after the first ride or lap on the pump track even bigger. Particularities: Roc Loc sports adjustment system Complete Hardbody shell In-mold polycarbonate shell with EPS liner Quick-dry padding reflector elements Removable visor 18 vents Universal Fit: 50 - 57 cm The Roc Loc Sport Fit System offers easy one-hand operation with a 7 cm adjustment range. Its good feel and sound let drivers know that the helmet provides a comfortable fit. With comfort similar to the Roc Loc 5 and ponytail compatibility, the new Roc Loc Sport Fit System brings premium functionality to the level of sport helmets. The helmets from Giro's Universal Fit Sizing family will fit most people right at the first try. The unique universal fit, combined with easy-to-use and comfortable adjustment systems, ensures a perfect and secure fit. With the In-Mold construction, the robust polycarbonate outer shell is glued to the impact-absorbing EPS inner shell in one operation during foaming. The helmet becomes even more resistant, without additional weight. This production process also makes it possible to form much better ventilation systems and vents. In-Mold helmets are lighter than traditional helmets and have much better ventilation systems.