The RACE METRIX system allows you to test or rent racing skis without any concession to performance and skiability. It is equipped with the Full Action reinforced stop and the SPX heel piece. The SPX12 RACE METRIX GripWalk® can only be mounted on skis with R22 interface and has a range of adjustment to fit boot lengths between 262 and 362 mm. This system is compatible with all adult boots ISO 5355 A and GripWalk® ISO 23223 A.