The 512 Pedals from SQlab gives you a unique, ergonomic, and dynamic riding position thanks to a choice of axle lengths to best suit your needs. Lightweight road bike pedal from 235g/pair (incl. shoe plates + screws 318g)Ergonomic foot position for better power transmission4 different axle lengthsAdjustable entry and exit hardnessSee images for size chartUnlike conventional clipless pedals, which force the feet to adopt an almost parallel, unnatural foot position, the 512 road bike pedal allows a physiological and natural foot position. This not only prevents one-sided loading, particularly of the fibula head, but also improves the transmission of force. The SQlab pedal technology provides a round pedal in a natural, anatomical position.Which axle length is required in which case Shorter axle: These pedals are seldom used, but still have their justification. The short axle is suitable for cyclists with small shoe sizes who can ride in a parallel foot position. The so-called Q-factor is therefore lower. Especially in combination with a narrow sit bone distance and narrow hip width it makes sense to stand with the feet as close together as possible. The short axle length is also suitable for children.Middle axle: The standard size, for all those who honestly also get along well with the pedals of the market leaders in this field.Longer axle: This is important for people whose foot position is V-shaped when viewed from above. If the feet are placed parallel on the pedals, this no longer corresponds to the natural position and this can lead to complaints in the knees. So, if there are complaints especially on the outside of the knees at the fibula head, the feet should be placed on the pedals in their natural position.With the SQlab click pedals, the cleat can usually be adjusted without problems. However, since it is then usually too narrow for the heel, which drags on the crank or frame, the longer axle of the SQlab pedals simply provides more space for this foot position. Even from shoe size 45 on it often gets tight and you can see polished cranks.