According to the different tooth discs, the bicycle chain can be divided into three types (single speed vehicle is not included in the range), single tooth disc, double tooth disc and three tooth disc, so the judgment methods of chain length are different.
First, let’s determine the length of the chain.
Single piece toothed disc chain installation: it is commonly used in touring car and folding car toothed disc.
As shown in the above figure, the chain does not pass through the back shift, but passes through the maximum tooth disc and the maximum flywheel to form a complete circle, leaving 4 chains.
Installation of double tooth disc chain: the tooth disc of common highway vehicles and folding vehicles can also use the tooth disc of highway vehicles.
The mountain vehicle has a double disc design since 2010.
As shown in the above figure, after the chain passes through the back pull, the maximum tooth disc and the minimum flywheel to form a complete circle, the angle formed by the intersection of the straight line formed by the tension wheel and the guide wheel with the ground is less than or equal to 90 degrees.
Such chain length is the best chain length.
Three piece toothed disc chain installation: common mountain bike toothed disc and highway toothed disc also have three piece disc design.
As shown in the above figure, the chain does not pass through the back shift, but passes through the maximum tooth disc and the maximum flywheel to form a complete circle, leaving 2 chains.
After judging the length, install the chain.
It is worth noting here that some chains have positive and negative ones, such as shimano570067007900 and hg94 (New 10s chain) in mountainous areas.
Generally speaking, the literal outward direction is the correct installation method.
The installation method is shown in the figure.
As for why there are pros and cons, it is because the chamfer of the chain on the reverse side is different from that on the front side.
Serious warning: don’t put the front and back wrong.
Otherwise, the chain will break in a short time.
The final preparation for chain installation is a small detail, which is often ignored.
When installing, the direction of the inner guide plate and the outer guide plate should be on the left or the right.
The correct installation direction will make your chain stronger.
When you step on it, a will be less likely to break than B.
Therefore, we recommend the link method shown in figure a below.
The following is about the installation operation of the chain.
Regular boxed chains are all with pins.
A metal column called a pin that links a chain.
In fact, installing the chain is very simple, just like closing the elephant in the refrigerator.
Open the door, plug the elephant, and close the refrigerator door.
The first step in installing the chain is to insert the pin into the hole of the chain.
Step 2: drive the pin into the chain with a chain breaker.
After hitting, move the movable chain by hand to see if there is any blockage.
It doesn’t explain that the installation is correct.
Generally, when a regular pin is hit to the end, the chain breaker will give your hand a feeling that it is OK.
The correct pin position is shown in the figure below.
Step 3 the last step is to break off the excess pins.
Some chain breakers have this function.
If not, use pointed nose pliers.
Below are the broken pins.
It should be noted that for some chains such as Campagnolo, the extra pins do not need to be broken.
It has a plug-in design.
After being driven in, the extra pins can be pulled out by hand.
Of course, most chains do not have this design, so they use magic buttons such as SRAM chains and KMC chains.
If you like to dismantle and wash the chain frequently, Campagnolo and Shimano chains can also use magic buttons, but pay attention to the correct width of the chain.
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