R-1 Comp with integrated heel protectors and special sports footrests to prevent slipping on ramps and in the street! In order to achieve maximum strength with the lowest weight, the highly alloyed aluminum material has undergone a new special T5 heat hardening process. The tempered aluminum 6060 is four times stronger than normal aluminum and has the extremely lightweight properties of the special aluminum also used in aerospace construction! The tempered aluminum 6060 is four times stronger than aluminum.