A Study on the Adjustment Method of Bicycle Shoe Cleat for Bicycle Fitting System

Abstract

The nation's fraternity and elite players who have built up a global bicycle infrastructure often find it to be a problem with the bicycle's speed and speed reduction, pain in knees and hip joints, or even with the bike itself, or with the bike's own physical defects or a riding posture. However, we found that most cases of cleat adjustment errors were likely to be true. Accurate adjustment of the cleats is the most important of the entire fitting process and can be the basis for improving the ability of the bicycle rider and preventing injury. Therefore, the study was intended to give a prior study of bicycle fitting, which can improve bicycle efficiency and prevent injury when riding bicycle, and specific ways of adjusting bicycle shoe cleats, and the following results were obtained. First, the cleat characteristics of Shimano, LOOK and Speedplay, which are currently used in public, and the characteristics during the cleat adjustment process, were derived. In addition, the structure and characteristics of dedicated shoes using cleats and the method of using pedalling by the structure of shoes after adjusting the cleats were derived. Second, the position of the shoe and its relationship with torque in pedalling was discussed, and the method of adjusting front and back of cleats was derived. Third, leg length, ASIS, Q-Angle and Q-factor etc. were analyzed and the method of setting and adjusting cleat left and right values were derived. Fourth, the relationship between walking angle and cleat rotation was analyzed, the method was derived, and the torque size and angle behind the cleat adjustment were compared and analyzed using the spinner to indicate the torque and the effective mean torque angle after the cleat adjustment.

Fig. 1. Conceptual diagram of bicycle fitting system

Fig. 2. Bicycle fitting software design

Fig. 3. Conceptual diagram of bicycle (hardware) for fitting

Fig. 4. Bicycle fitting software design

Fig. 5. A : Shimano MTB cleat, B : Shimano road bike cleat, C : LOOK cleat, D : Speed play cleat

Fig. 6. A:Shimano MTB cleat[17]

Fig. 7. Bicycle fitting software design[19]

Fig. 8. Standard Cleat Position, Midsole Cleat Position[14]

Fig. 9. Bicycle fitting software design[13]

Fig. 10. Bicycle fitting software design[13]

Fig. 11. Shimano Road cleat[10]

Fig. 12. LOOK cleat[15]

Fig. 13. Speedplay cleat[20]

Fig. 14. A:base point, B:reference line

Fig. 15. Adjusting the front and rear values of the cleats

Fig. 16. Adjusting the left and right values of the cleats

Fig. 17. ASIS

Fig. 18. A:before knee alignment B:after knee alignment[21]

Fig. 19. Q-Angle[18]

Fig. 20. Q-Factor[16]

Fig. 21. Length of crank shaft[11]

Fig. 22. A:straight-line crank arm, B:flexural crank arm[11]

Fig. 23. Foot progression angle[18]

Fig. 24. Foot progression angle. Normal ranges shaded[18].

Fig. 25. Adjust bicycle cleat rotation value[10]

Fig. 26. Rotate the inside of the cleat (back heel reference)

Fig. 27. Cleat 11 characters fixed

Fig. 28. Rotate the cleat outer (back heel reference)

Fig. 29. Analysis of Pedaling Torque Using Spinscan