The features of the 511 clipless MTB pedal at a glanceAxis lengthThe clipless MTB pedal is available in four different lengths. The version with shorter axis is suitable for small shoe size and at the same time small sit bone distance. The so-called Q-factor can thus be reduced. The SQlab pedal technology ensures a rounded step in a natural, anatomical position.ErgonomicsUnlike conventional clipless pedals, which almost force the feet to a parallel, unnatural foot position, the 511 clipless MTB pedal allows a physiological and natural foot position. This not only minimizes a one-sided load, especially from the fibula head, but also improves the power transmission at the same time.Cause -one-sided load Pedals with a short axis usually only allow a parallel foot position SQlab SolutionPedals with different axle lengths for a natural foot position Description at a glanceClipless pedals available in four different axis lengths. Conventional clipless pedals force the feet into a virtually parallel position. The longer axle of the SQlab 511 Race clipless pedal allows a physiologically natural foot position. This prevents one sided loads - especially with a calf leg head or fibula head syndrome. The version with shorter axle is suitable for small shoe sizes and small sit bone distances. The so-called Q-factor can hereby be reduced.The included cleats are SPD compatible.Technical specifications at a glanceARTICLE NUMBER(S)1197 / 1198 / 1910 / 1911 / 2816 / 2817 / 2818 / 2819AREA OF USE/BICYCLE TYPE MTB TECH & TRAIL WEIGHT(S) IN G (PAIR)APPROX. 310 / 322 / 341 / 367 AXLE LENGTH(S) IN MM-5 / 0 / + 8 /+ 15 DISTANCE CRANK TO PEDAL CENTER IN MM 47,9 / 54,9 / 61,9 / 68,9 PEDAL SURFACE IN MM 65 X 80MATERIAL PEDAL BODY ALUMINIUM MATERIAL \EDAL AXLE CRMO PIN HEIGHT IN MM - CLICK SYSTEM SPD \FREEDOM OF MOVEMENT IN °+ / - 15 E-BIKE READYYES, IF NOT WIDER THAN THE ORIGINAL PEDAL DIN/ASTM CATEGORIES 4