Some riders reflected: in the riding process， each trample a circle， will be issued a "foot" regular "Da" sound;

About this question， we first consider is: the foot to have quality problems， or bearing a problem!

According to our research， and pedal factory technical feedback: in fact， the ninety percent is the problem of installation!

"The amount of Kuang Da" sound actually comes from between the pedal crank threads and thread and extrusion!

First， everyone in the mounting foot， whether has obtained tight enough?

You may have seen the car inside the shop pedal wrench that special (handle long); new pedal while you buy，generally in your home are using an ordinary wrench or inner six angle wrench to tighten， and then no matter; in fact，fastening pedal torque needed， is common (10-20cm) length of the wrench it is difficult to achieve， even if you press the hand cramps! So the foot wrench will used long arm design (screwing torque increase);

Between the two threaded fit not tight after use， there will be wear Kuang quantity (maximum wear is often a crank，because its material for aluminum alloy， soft material)， and then generate noise. Crank for longer， Kuang Liangyuebig!

So， you must to the car shop， foot wrench borrowing dedicated， tighten your foot.

Second， between the pedal and crank， whether pad foot pad?

When installed， if between the pedal and crank pad， a metal gasket， can rise to disperse load， reduce the vibration generated when riding， and reduce the abrasion.

For larger amount of noise has a crank Kuang， between the pedal and crank pad foot gasket (the gasket is generally buy a tooth disk when the standard， most pedal without)， and with professional foot wrench tightened onvigorously， has produced worn threads play a correct role. Through many riders pedal test， ISO 90% ring can be removed.

In third， confirm that there is still abnormal sound generated under locked state， can be replaced with another group of pedal and press 1，2 method extended function locking， try again.

A if there is still abnormal sound is the sound may come from BB (axis system) or the transmission structure; pleaseand professional bicycle shop maintenance.

B if the other case abnormal sound exclusion may be pedal quality problem， the warranty period the original storefeedback and the original factory repair "buy".