How to assemble a rear wheel sprocket on a bicycle

STEP 2B: Install the steering wheel

assemble, rear, wheel, sprocket

  • Unscrew the clamping screw (s) on the stem with a 4-way wrench to remove the cover.
  • Insert the handlebar into the bracket, being careful not to cross the brake cables.
  • Place the handlebar in the desired position and tighten the screws (tightening torque 6 Nm), note that there must be the same distance between the hood and the stem at the top and bottom.

The tools you need

The conversion requires limited mechanical knowledge and only a few bike tools. These are tools that every cyclist should own anyway, as they are essential for basic maintenance / replacement parts. This project. a good reason to get tools if you don’t already have them!

  • ruanbian and retaining ring tool. used to remove cassette with rear wheel.
  • Chain tool. you need to shorten the chain to the correct size.
  • Large adjustable wrench. used to rotate the retainer.
  • Various socket wrenches. used to remove the rear derailleur and derailleurs, install the tensioner, etc.

How To Install A Motorized Bike Kit. Rear Sprocket

Adjust the brakes

For the front brake caliper, check that your brake calipers are securely attached and then tighten the chimney screw if necessary.

  • Use a 5mm hexagon wrench to loosen the cable retaining nut.
  • Install the brake pads on the rim and, while holding them, pull the cable down and tighten the fixing nut.
  • Using the brake pad screw, adjust the height of the brake pads so that they touch the brake band (top of the rim).
  • Carry out the same operation with the rear brake caliper.

Inflating tires

  • Unscrew the cap from the pump valve.
  • Press the valve into the bottom of the tire (loosen the small ring on the valve if necessary).
  • Unscrew the valve body.
  • Connect the pump to the valve and pump the inner tubes. Make sure the pumping is uniform, we recommend 5 bar at the front and 5.5 bar at the back.


In this section, you will find instructions that are not part of the assembly, but provide information on the components of your bike and how they work.

Bicycle Gears Explained | The Complete Guide to Bike Drivetrains

The top tray may already be on your model bike

  • Flip the bike.
  • Install the rack on the left side of the bike on the opposite side of the drivetrain.
  • Install the stand by tightening the nut.
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NOTE: The stand is only designed to support the weight of the bike, it is not designed to support the cyclist and bike.

Bicycle sprocket care

Needless to say, all mechanisms require maintenance, otherwise they will quickly fail. If you clean the transmission of dirt as it gets dirty, it will significantly extend the life of the part.

You can clean the bike structure according to the following principle:

  • Release the brake and remove the rear wheel;
  • Inspect the inner cassette for dirt. If the dirt is strong, then without removing it will not be possible to clean, in the case when the dirt is minimal, then you can clean it directly on the bike;
  • Use coarse-bristled brushes for cleaning, but they should be small enough to get into hard-to-reach areas. An old toothbrush that is not planned to be used for its intended purpose is suitable for such cleaning;
  • Initially, a rag should be dipped in kerosene and only then start removing dirt from the sprocket;
  • After cleaning, apply grease to the brush and wipe over the teeth. Then install back.

In order not to change the asterisks, you should constantly carry out proper care and diagnostics. Spending once a month a few minutes of your time to lubricate the sprockets, you can protect yourself not only from large costs, but also wasting extra time.

Therefore, it is much easier to take care of in a timely manner than to repair your bike, especially if you use it often enough.

If a breakdown still happened, you should not be upset, but make every effort to fix it yourself.

How to remove the sprocket from the rear wheel of a speed bike

A speed bike drivetrain consists of three main elements: a derailleur on the rear wheel, a derailleur (shifter) on the handlebar, and a set of sprockets. The latter bear a heavy load, so they are subject to rapid wear. Before removing the sprocket from the rear wheel of a speed bike, you need to learn how to do it correctly. Errors made during disassembly will lead to damage to the part, or failure of the ratchet bearings (it all depends on the type of design).

Why you need to change sprockets on a bike?

The sprocket on a bicycle has one of the main roles that affect ride quality and speed. During the use of a two-wheeled vehicle, a load is exerted on all its component parts.

Replacing the sprockets is essential for proper function and gear shifting. If you do not repair parts immediately after damage, there is such an option that broken parts will accumulate and repair will be quite costly, in some situations it exceeds the cost of the bike itself.

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Step-by-step removal from the rear wheel

The sequence of actions differs depending on the type of construction of the part. Therefore, before removing the old cassette, the bicycle owner should find out which category it belongs to. There are two of them:

  • Standard cassette. Consists of at least six stars, is fixed to the bushing with a special nut, which is screwed to the drum. Budget cassette models consist of a riveted base (from 1st to 3rd or 4th stars) and a set of additional stars bolted to the base with a hex bolt. Everything that is higher in cost can be freely disassembled thanks to two common hex bolts that secure all the sprockets at once.
  • Ratchet. Many people confuse it with a regular cassette. Visually, it strongly resembles a standard bicycle cassette, but structurally is very different. First of all, it cannot be removed like a regular cassette from a drum. This is because the drum, equipped with loose bearings, is one piece with the ratchet. To remove it, you will have to disassemble almost half of the sleeve, leaving only the shaft with the bulk bearings of the sleeve.

Now more about the sequence of actions when removing the bicycle cassette. The procedure will not take much time. The main thing is to adhere to the instructions:

  • Removing the rear wheel from the bike. To do this, unscrew the two nuts on the shaft, or pull out the eccentric handle (if there is one) to loosen the fastening. It is important to watch the chain so as not to twist the rear derailleur.
  • Checking the current state. This can also be done on the bike without disassembling it. But in this case, it is not always possible to notice that the repair of the cassette of your bike needs to be done as quickly as possible. For example, if the bushing suffers from micro-backlash, while the owner attributes this problem to the cassette.
  • Withdrawal. For dismantling, a chain whip and a special cassette puller are used. First you need to see where the 12-tooth retaining ring is. If the rear hub is heavily contaminated with oil and dirt, making it difficult to quickly locate the retaining ring, it is sufficient to clean the last sprocket of the cassette with the least number of teeth. It is held by a retaining ring having a left (reverse) thread. When unwinding, you can hear a characteristic crunch, sometimes a grinding sound. No need to worry, extraneous sounds are caused by locking teeth and loosening of the tightening torque. The whip is used to prevent damage to the hub drum.
  • Shifting the cassette. To remove the element, it must be moved relative to the drum in any direction. The part will not fly apart into separate collapsible parts if all of them are fixed with long hex bolts.
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That’s all. the procedure is complete, you can carefully examine the technical condition of the part. The inner faces of the star and the teeth are subject to verification. Additionally, you need to make sure that the star itself is not curved.

Removing the rear wheel from the bike Checking the current status Removing Shifting the cassette

How to remove rear sprockets from a bike

The bike drivetrain requires periodic maintenance. The most common problems are chain wear and failure of one or more sprockets on the cassette. Wear is also true for a single-speed one, the only difference is that the chain and the star itself are designed for longer operation.

The worn out part of the transmission negatively affects its entire operation, therefore the used sprocket will need to be replaced. Especially this problem pops up on asterisks, which are used too often, which, in principle, is logical. Before changing, it is necessary to remove the worn out sprocket from the rear wheel, which we will talk about further.

How to Repair, Repack and Adjust a Bicycle Hub

How to remove sprockets from the rear wheel of a bicycle?

If this is a ratchet, then everything will be a little easier. If there is special equipment, then even a person who has nothing to do with bicycles can cope with this.

This requires only 2 tools:

  • special puller;
  • adjustable wrench.

First, of course, you need to remove the wheel. Then the stars are removed in two steps. It is necessary to insert the puller into the ratchet, and then try to turn it counterclockwise with a key.

If the mechanism has never been removed, then it can twist strongly (such is its property) and not give in even under great efforts. Then you need to spray the miraculous WD-40 spray there from the thread side. If you leave it like this for a few hours, then the ratchet can be easily removed. It should also be remembered that the larger the lever, the greater the effort. Therefore, you need to take the largest adjustable wrench. Do a couple of jerks and the ratchet will unscrew easily.

You will need another tool to remove the cassette. It’s called a whip. This is a handle to which a piece of a bicycle chain is attached. If you turn the cassette counterclockwise, it will start to rotate. This is where this whip will come in handy, which will hold her. Some craftsmen simply use a piece of an old chain instead of this tool. Then everything is the same as when removing the ratchet.