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Bicycling-Self-locking locking piece adjustment method

it's its locking, and unlocking methods have been no different from the current locking pedal system,

By Pramod TiwariPublished 2 years ago 4 min read
2
Bicycling-Self-locking locking piece adjustment method
Photo by James Thomas on Unsplash

it's its locking, and unlocking methods have been no different from the current locking pedal system, also gently step down and push forward to lock, and lightly twist the ankle to unlock. The appearance of this locking pedal caused a huge reaction in the cycling circle at that time, and in the following year, that is, 1985 Tour de France, the rider Bernard Hinault used it and won the overall championship (copied from the US bike)

The locking piece is different due to the different styles of functionality and is broadly divided into triangular road system locking piece and disc type mountain system locking piece, the mainstream brands are SHIMANO and LOOK, of course, there are also time spaceship type locking piece and Wahoo Speedplay lollipop type, the upper/unlocking structure is similar, Speedplay is the unlocking mechanism installed in the locking piece through seven The unlocking mechanism is installed on the locking mechanism through seven screws and the adjustment of this behavior is not shown here, so let's just talk about the adjustment method of the regular road self-locking and mountain self-locking.

The road bike's triangular locking plate has a large adjustable space, about 2~3cm up and down, 1~1.5cm left and right, and 4~6° internal and external rotation angles can be adjusted independently of the head and tail rotation, its locking stability after locking is undoubtedly in the 40 years of the self-locking career, in contrast, the mountain bike small disc locking plate up and down 2~3cm, 1~1.5cm left and right and 1.5° internal and external rotation angle are quite unbeatable. The internal and external rotation angle is quite unable to fight, but its simple structure, not affected by mud, and bad road conditions on the convenience of the lock are also very popular. Today do not expand, simply talk about how to adjust the locking piece.

Road bike self-locking adjustment can first be determined by some basic positioning method to determine, that is, in the case of locking shoes up and down suitable without false position, by measuring the forefoot ball joint position to make a mark and the middle of the pinky ball joint position to make a mark to determine the fore and aft power center point of the foot, and then mark the position of the front external ratchet through the hip, single-leg squatting power to find the knee joint position, in checking whether there are knee internal buckle and ankle After checking whether there is knee inversion and ankle valgus as well as O/X-leg, determine the amount of locking plate positioning translation and rotation by correcting the force position, which is the basic locking plate position debugging.

Of course, this is only a very basic static locking plate installation method, if you go to more accurate debugging of the locking plate, it is necessary to know clearly the impact of the position of the locking plate on the proportion of muscle force and knee pressure, such as the amount of locking plate translation will change the pressure of the internal and external meniscus, and the locking plate debugging position and the opposite of the locking shoe position, for example, such as the locking plate translation to the outermost side of the locking shoe, then when the locking plate locking in the pedal, the locking shoe in the pedal The pressure on the medial meniscus is at its maximum, and the pressure on the medial muscles, such as the adductors, gastrocnemius and even the sutures and hip flexors, will become greater, while the lateral muscles will not be able to generate force, such as the rectus femoris, the middle femoris and the lateral femoris, which will not only be inefficient, but will also cause a large accumulation of lactic acid in the medial muscles, resulting in the inability to generate force and cramps.

The professional debugging of the locking piece often requires professional instruments to detect the force quadrant, according to the experience of the technician and professional equipment such as XYZ axis three quadrants professional grade power meter to monitor the force stability, force position, force effectiveness, pedal smoothness, maximum force point, force moment, left and right balance, etc. to determine the stability of the locking piece, on this basis also need to modify such as saddle height, saddle front, and rear position, handlebar height, handlebar height, handlebar height, handlebar position, knee height, knee height, and other factors. On this basis, we also need to modify the data such as saddle height, saddle front, and rear position, handlebar height, handlebar height, knee force center point and pedal axis position, etc. After repeatedly testing the data for strength testing, and finally copying the data to the bike, and then testing the strength again, to solve the slight error brought about by the actual road conditions and improve the stability, through a review once every three months, to solve the problems brought about by the locking plate to the body.

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Pramod Tiwari

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  • Dr Lachlan Soper9 months ago

    Thanks for sharing this advice!

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