How to straighten a rim on a bicycle with your own hands

How to create a bike trailer at home

To create a bicycle trailer with your own hands, you will need the following:

  • straight square pipes;
  • corners;
  • four corner pipes;
  • wheels;
  • eight metal plates;
  • a metal sheet;
  • boards;
  • screws, nuts, screws, nails for hammering boards.
  • drill;
  • welding machine;
  • electric jigsaw;
  • spanners.

The first step in creating a trailer frame is to create a dimensional drawing. You need to come up with them in advance, based on your own preferences. In general, the drawing will look like this:

When we have decided on the size and location of all the elements of the future trailer, we start manufacturing it. At the ends of pipes and corners, holes are drilled with a diameter corresponding to the screws.

Important: all holes must be aligned with each other when connecting parts accurately! The numerical dimensions of the distances of the holes from the edges are immediately indicated in the drawing.

So, the rectangle is assembled, the next task is to weld the crossbars to it. For this, pre-prepared pipes are taken, the lengths of which correspond to the width of the rectangle. The optimal number of crossbars is two.

Manufacturing of external protrusions. Using a welding machine, we weld the corner pipes to each other, and then to the sides. The distance between the sidewalls and the outer tubes must match the width of the wheel hubs.

  • Four identical plates are taken.
  • The size of the dropouts is marked on each.
  • Using a jigsaw, grooves are cut to fit the dimensions of the hub bolts of the wheels.
  • Plates are welded to the sides of the trailer frame and outer pipes.

The next stage in creating a trailer with your own hands is making the walls from boards, welding the metal bottom and connecting the walls to it. Holes are drilled in the bottom, into which metal corners are fixed with bolts. The distance of the holes from the edges of the bottom is selected in such a way that the corner is on the inner side of the walls. We install a plank rectangle and use self-tapping screws to fix it on the corners. The number of connections of the walls with the bottom is selected based on the size of the trailer, but the more, the better.

To complete the structure, it remains to make a drawbar, or an element for securing the trailer to the frame. Two pipes and the remaining metal plates are taken. The first pipe. vertical. is screwed to the rectangular frame of the trailer. A hole of a given diameter is drilled in the front part, exactly the same. in a vertical pipe. Then, using a long bolt, we connect both parts.

The horizontal element of the drawbar must be secured to the vertical tube and the bike frame. We take four plates and drill holes in each. Then we weld on the edges of the pipe on both sides. The horizontal part of the drawbar is adjusted to the vertical one, both pipes are firmly fixed with a bolt and a nut. We select the height of the horizontal pipe depending on the bike.

The last thing left to do is attach the trailer to the rear of the frame. The bolt seats are ready, we drive the drawbar with the plates forward and tighten. The trailer is ready. According to this principle, you can also make a trailer for children: higher walls, a seat and a tarpaulin visor.

Bicycle cradle on the road: safety rules

With additional load, the bike becomes more dangerous both for the driver himself and for other road users. When leaving with a trailer on the road, the cyclist must make sure:

  • all fasteners in the trailer are in good working order;
  • in the reliability of the connections of the drawbar pipes with each other and with the bicycle;
  • in the safe location of the cargo.

Permitted dimensions of the transported cargo in width. no more than 0.5 m in each direction. It is advisable to screw a reflective element onto the trailer if it is homemade.

Either way, the extra bogie in the back makes the bike less responsive, especially around tight turns. The total travel speed with the trailer should be lower than the usual speed of the cyclist. In other words, the bicycle turns into a slow-moving vehicle.

A bike and a trailer rolling behind it can be a serious bait for dogs. All cyclists know firsthand about their passion for two-wheeled vehicles, but imagine if they see four such wheels? The attack of animals on the bike distracts from the control, and can turn into an accident. With this in mind, we choose a safe route. It’s good to have protection with you. a stun gun or pepper spray.

There are craftsmen who live on earth, as they say, of all trades, who are able to independently assemble a bicycle. In this case, there is no need to talk about quality, although it can be different. But nevertheless, making something with your own hand is a great experience that will not hurt anyone. For example, the Chinese Kevin Cyr designed and then assembled a whole house on wheels. Camper bike. It was presented to the public in April 2008. But no one is producing serial samples yet, you understand why. )))

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You may need a cargo bike only a few times in your life, but let it be better than suddenly having to look for it later. This design will be indispensable for the transportation of a certain amount of cargo that cannot be carried by hand, but it is extremely unprofitable and costly to use a car for this. Next, we suggest watching the video. It clearly shows how to make a simple cargo bike from the usual old “Ukraine”. Everything is done with a bolkar and a welding machine. Not even turning work was needed.

A bike trailer is a useful thing. One of the commercial companies produces the popular Pchelka and Pchelka 2 bicycle trailers. However, a bike trailer can be made by hand. Its design is quite simple and includes several mandatory components: a platform measuring 70 x 100 centimeters, mounting brackets, a frame with wheels and a place for attachment to a bicycle.

To make a bicycle trailer, you will need the following tools: a grinder with two types of discs. cutting and grinding, an electric drill with nozzles of various diameters, a welding machine, a mask, gloves for safe work, a ruler, a pencil for marking, steel pipes of small and inch diameters, as well as strips up to thirty centimeters wide, a hammer, bolts for securing the structure (their diameter depends on the diameter of the drills selected for work), a ball joint, threaded studs, two wheels, the platform itself (it can be either wooden or from other materials).

A metal frame for a bicycle trailer can have a simple design with oblique mounting plumb lines and a dropped axle for the wheels. You can always find a drawing for its manufacture on the Internet or, if you have the ability to create it yourself. In order for everything to work out what is called the first time, it is necessary to make very clear measurements and be guided by the principle of “measure seven times and cut once.” A very important point is the system for attaching the trailer to the bike. In the common people it is called a drawbar. This is a kind of knot made from a two-inch square tube. Below are a few drawings for self-manufacturing of this device.

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The platform for the bike trailer itself must be light and strong overnight so that heavy objects and loads can be transported with it. Most often, MDF is used. a material that is durable to break and at the same time is characterized by low weight. The only drawback of this material is that it easily absorbs water and collapses under its influence. But the modern market also offers MDF with a water-repellent coating. In essence, it solves all problems.

A self-made bike trailer is a very convenient thing. You can independently determine the size and shape of the trailer that will suit your needs. In the end, after you have created a bike trailer, you can try yourself as a master manufacturer of experimental bicycles. this is always very interesting, and in the long term it is also incredibly profitable.!

Before starting, you need to prepare the necessary materials and a basic tool with which the work will actually be done.

  • Steel or aluminum square profile (you can also use a round profile);
  • Metal plates;
  • Bolts with nuts and washers;
  • Ball joint;
  • The required number of wheels, depending on the design;
  • Angle grinder with cutting and grinding disc (popularly. grinder);
  • Electric drill;
  • Drills of a diameter commensurate with the bolts;
  • Welding machine (can be rented);
  • Square, tape measure, pencil, marker;
  • Hammer;
  • Bolt wrenches;
  • Gloves and goggles (don’t forget about safety precautions)

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Types of bike trailers

At the moment, there is a wide variety of bike trailers on the market. All of them can be divided into types that characterize the specifics of their purpose, and, consequently, design features. Below we will dwell on each of them in detail and explain which bike trailer is best for you.

For transporting children

They are an analogue of a stroller (by the way, some models, having disconnected from the bike, can be used in this way) and can be either single or for two children. Often, a scheme with two wheels is used, which can be equipped with shock absorbers for a more comfortable ride. Bicycle trailers for transporting children have one of the safest designs. To ensure the safety of the child on the road, these bicycle trailers are equipped with a swivel joint, which will prevent the bicycle trailer from overturning if the tractor bicycle driving it falls. Child seats are equipped with seat belts. For more comfortable movement of children, these cycling carriages can be equipped with special mosquito nets and rain covers. It is worth noting that almost all expensive imported children’s bicycle trailers undergo a specialized crash test, which tests their safety. The disadvantages that are inherent in other bike trailers are not bypassed by the children’s side. The only thing is that they can be less pronounced in comparison, for example, with cargo. Although this view is the safest, it will not be superfluous to add a couple of additional reflectors and signal lights. And so. this is a great choice for a joint bike trip with children.

How To Fix Or Straighten A Taco’d Bicycle Wheel

Attaching the trailer to the bike (drawbar)

The drawbar is undoubtedly one of the most important parts of a bike trailer. Ease of use and maneuverability depend on its design. You can make this element in the form of a triangle that connects to one guide.

The simplest option would be to connect two pipes in series. The guide must ensure the entire structure is in a vertical position.

Direct spotting to the bicycle frame is most conveniently done in the form of a hinged bracket, which is attached to the saddle axis guide. The hinge adds a smooth ride when cornering and does not put additional pressure on the bike frame.

So, to fix your wheel you may need:

  • spoke key
  • crayon or something that can draw on the wheel rim (water marker)
  • universal plastic assemblies for dismantling bicycle tires.

We need the spoke key to loosen and tighten the wheel spokes. I must say right away that you won’t have to tighten up much. You will gradually tighten the knitting needles and check the results immediately.

How to fix a figure eight on a bicycle wheel

If your wheel is bent and you don’t know how to fix it, you are in the right place. I have already come across this problem and will tell you simply. repair is possible. everything is quite simple. over, I will say that the problem that you are faced with will most likely arise at an enviable frequency if you love your bike and ride it several times a week. Therefore, it is worth learning this once, so that in the future you can remove the breakdown yourself every time it occurs.

Also, be sure to read how much pressure you need to inflate the wheels of the bike here.

How to tell if your wheel is okay. Simply place the bike upside down on the saddle and on the handlebars with the wheels up. Spin the problematic wheel, as you think, (spin it in the sense of rotating it around the axis) and check it first “by eye”. If everything is in order with the wheel, then it will rotate around the axis absolutely evenly. If there is a figure eight, then it should be visible to the naked eye, or more often something like the beating of a wheel in a certain place. It is necessary to look at the wheel in profile and in face, since the bending of the wheel can occur in different directions.

General algorithm for eliminating problems with a deformed wheel

The general algorithm is as follows. we determine in which specific place the figure eight begins and where it ends (we select the lesion focus). The next step is to find the center needle in the figure eight and work with it. If our figure eight falls to the left side, select the spoke on the opposite side and pull it up to a distance of less than one turn of the spoke key. Then we take two adjacent knitting needles. these will be knitting needles already on the opposite side of the previous knitting needle. weaken them by the number of revolutions a little less (for example, 2 times less) than we tightened the previous knitting needle. And so on until fully straightened. That is, the next two knitting needles (they will be placed on the opposite side) are already tightening even weaker than the very first knitting needle. As you move away from the central spoke (lesion focus), the number of revolutions, respectively, will also decrease gradually.

So, again, how do you fix a figure eight on a bike? To fix the wheel, we select a section where there is an eight, and along the length of this entire section we loosen and tighten the spokes going one after the other. We loosen the spokes on one side of the wheel, and tighten them on the other. When the required operations have been completed with all the spokes, we rotate the wheel again and see the correct movement of the wheel around the axis. If it gets worse, we return the knitting needles to their previous place and make the tightening-weakening less. Thus, the skew in one direction leading to the figure eight will gradually level out. In order to perfectly align the figure eight, you will have to patiently and painstakingly perform all the above actions slowly (i.e. we twist a little).

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Eight larger. to be treated in the same way as a small one

The wheel is flattened by an egg, the straightening algorithm is slightly different. We only pull up the right side

Types of bends that are possible in principle:

The eight wheel tilted to the left, the dotted line shows how it should be

The wheel is curved like an egg. The dotted line shows how it should be

Umbrella curvature. Dotted line as it should be

How defects can form and why

There is a widespread belief that the wheel can change its shape if you do not ride carefully, when driving over bumps or during unsuccessful jumps. This is all true. That is, all this, of course, affects the rapid wear. But that’s not the only reason a wheel can break. When the cyclist gets on the bike, the wheels are already being loaded in the vertical direction. Further, when braking at speeds, the wheels can deform, forming eights. When maneuvering (cornering) in any direction and hard braking. In general, I think you can not explain what sloppy driving is, you yourself understand everything perfectly. So caring for your bike can put off the problem, but over time you will come back to it anyway. Even if you ride very carefully on a good road, such is the specificity of a bicycle.

Of course, everything still depends to a large extent on the wheel rim itself, on its physical characteristics. Therefore, when buying a bicycle, one should pay the seller’s attention to such things, wondering how long the wheels can last, how they react to the deformations described above. So on cheap bicycles, the rims are correspondingly less strong. And various bends (egg and eights) of the wheels can form much earlier than on their more expensive and high-quality counterparts.

In general, how the problem can arise, I think you already understood. So let’s get straight to how to solve the problem and align your wheel.

What tools we may need to eliminate defects

How to straighten a wheel in practice and how to determine exactly where the figure eight of a bicycle wheel goes

How to determine exactly where the eight passes. Masters who have gotten their hands on in this matter can fix the problem without improvised means (crayons and other things). You will have to edit the wheel first with the use of chalk. Spin (rotate) the wheel and gradually bring the chalk to the rim of the wheel rotating in the axle. In those places where there is an eight, the chalk will touch the rim and scribble serifs on it. So you define an eight for yourself.

I saw another great option on how to straighten a figure eight on a bicycle wheel in one video. We take ear sticks. On both sides of the wheel we have front fork stays. We attach ear sticks to these feathers on scotch tape from both sides and, just like with a crayon, rotating the wheel, gradually bring the ear sticks to the wheel rim and the places where they begin to clearly touch the rim. mark with chalk. Quite a convenient option, since it can be quite problematic to hold the chalk on the weight. If your wheel is flattened like an egg, that is, it has lost its perfectly round shape, we do everything the same as for the figure eight, only we just bring the chalk from the outside of the rim. where the tire with the camera should be.

As a result, I would like to say that it is better to learn how to do all this yourself once. than to go to the workshop every time. Personally, I remember the workshops as would-be masters who do not have time to serve everyone, so they do everything in haste. And you are the owner of the bike and you can do everything unhurriedly, unhurriedly, literally and accurately. So go ahead and buy spoke wrenches and fix your bike wheels!

Pedals on the bike find out the reason here.

See more about fixing the figure eight on a bicycle in the video below so that everything finally fits in your head with a clear picture.

How to connect a wheel motor in front?

Motor wheels for front mounting are often designed for fork widths of about 100 mm. The wiring in these models exits the hollow axis on the right. To equip a bicycle with an electric drive, it is necessary to have a wheel motor with a suitable rim size. Before installation, it is recommended to unscrew and seal the outer motor covers with a heat-resistant waterproof sealant.

The front mounting of the electric motor is extremely simple. Need to:

  • Unscrew and remove the front wheel.
  • Install a wheel motor instead. Secure it using curly washers and nuts.
  • According to the diagram, connect all the components of the kit for equipping the bike with an electric drive.
  • Make sure the motor is working properly.
  • Clamp the engine. It must be securely fastened, free to rotate, and equidistant from the brake pads and fork elements. In case of imbalance over 1.5 mm, it is necessary to correct it by adjusting the spokes.
  • Install the remaining components. controller, battery, throttle and brake levers, PAS system and control panel.
  • Adjust front brake.

If you do not have experience in performing such work, you can use professional services for equipping bicycles with electric traction in our workshop.

We also invite you to familiarize yourself with our previous material on the formats and sizes of lithium-ion batteries.

Now you have an idea of ​​how to install a wheel motor on a bicycle with your own hands. It is especially convenient to use this type of transport for mixed riding: ride on a flat track with the help of pedals, and when entering a hill, turn on the electric drive and enjoy how the bike takes you upstairs. But you can also turn it on when you need to develop a high speed. the kind that only professional athletes can achieve on a bicycle. Thus, you can get a universal transport in which the lightness, mobility and simplicity of the bike design will be combined with the power and speed of an electric motor.

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Operating principle

The wheel motor is a direct current electric motor. It is installed on a bicycle rim, and you can choose both the front and rear wheels (or you can design a vehicle of special power and install the motor on two wheels at once). The power of such motors can be 250, 500 or 1000 watts. The most powerful one allows you to develop a bicycle speed of up to 60 kilometers per hour. Installation of the wheel motor on the bike does not require additional adjustment or maintenance, it is done in one go.

  • The bike is not subject to irreversible changes. Even its appearance hardly suffers. The main part of the device is mounted on the wheel.
  • The motor wheel runs almost silently.
  • Smooth, yet high-speed movement of your two-wheeled vehicle is achieved thanks to the smooth operation of the engine.
  • Climbing the hill is performed with minimal effort.
  • The device has no rubbing parts, so its service life is very long.
  • You can easily remove the device and return the original functionality of your bike.
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All the necessary components are often sold in ready-made kits, but you can pick them up yourself. Of course, the installation of a ready-made kit will be much easier and faster. Keep in mind that after installing all the elements, your bike will become 8-10 kg heavier, so give preference to parts with lighter weight.

Its diameter should be 20 to 28 inches. You can use an old wheel, but it should be in good condition with no functional deficiencies or breakages. And also it must be well adjusted for normal operation.

The motor itself, which will rotate the wheels for you.

A battery to provide the power you need to move your bike.

Required so that you do not fly off the track and can control your speed limit.

The board that regulates the operation of your wheel motor.

You will place the battery and the controller in them to protect them from environmental influences.

How to install a motor wheel on a bicycle

Installing the wheel motor

Now let’s find out how to install the wheel motor on the bike. It is necessary to develop a wiring diagram for all elements. If you purchased a ready-made kit, then the scheme is also available. If you create the circuit yourself, we recommend choosing the rear wheel of the bike to install the motor, and installing the battery, which is the heaviest part of the structure, on the trunk. It is advisable to bring the speed regulator to the steering wheel so that it is at your fingertips.

How to true a bent bike wheel without a spoke key

To install the motor-wheel on a bicycle, you can use acoustic wires that connect audio speakers. This is a cheap option that allows enough current to pass through. RCA connectors can be used.

Remember to put the battery in your backpack and shield it from rain, sand, and other types of moisture and dirt. And you also need to secure it securely, since a heavy structure can easily fly out of the trunk when cornering, especially if you develop a decent speed.

When assembling, consider a method that allows you to remove the installed motor to easily return the bike to its original condition. Usually, it is enough to change the motor-wheel to a regular wheel, remove the cover with the battery and wires. and the bike will take on its usual look.

Installing the electric wheel on the rear of the bike

To mount an electric motor to the rear of your bike, first make sure the electric wheel you choose matches the size of the stock wheel and fork. If an electric motor with a sprocket or ratchet does not fit between the frame stays, try using a ratchet with a reduced number of stars or even slightly straighten the dropouts.

The procedure for connecting the motor wheel at the rear is quite simple. Need to:

  • Unscrew the nuts or eccentric fixing the standard wheel. Extract it.
  • Remove the engine housing covers and coat them with a waterproof high temperature sealant and wrap it into the tire with a tube and rim tape.
  • Place the motor-wheel so that the wires go from the axis of the electric motor to the left in the direction of travel. since the chain and the speed switch are located on the right.
  • Completely assemble the wiring diagram of the motor-wheel without fixing the components (just “bait” the parts) in order to check the serviceability of the kit, determine the route of the wires and make sure that their length is sufficient.
  • Place the controller in an area inaccessible for water ingress on the device body.
  • Connect the wires according to the diagram supplied with the kit. Strictly observe the compatibility of connectors and match the colors of the insulation winding.
  • Install chain.
  • Align the wheel motor. during rotation, it should be at an equal distance from the fork parts and not touch the brake pads.
  • In case of a strong beating of the rim (over 1.5 mm up, down or in any direction). adjust its position by tensioning the spokes.
  • In the absence of noticeable beats, secure the engine with curly washers with an inner hole in the shape of a circle with 2 protrusions and an external curved spike (it should be in the hole in the frame). Washers of this design will prevent the engine from cranking.
  • Make sure the motor is working correctly. When the throttle is rotated, it should start moving smoothly and quickly gain about 400 rpm. idling. If you have a bike computer, you can track the speed on it.
  • Securely attach all parts of the electrification kit. Insulate the wires thoroughly and fasten them neatly to the frame.
  • Adjust the function of the circuit switches.
  • Check the operation of the brake system.

Wheel motor installation

You can install a motor-wheel on a bicycle in a workshop or on your own. provided that you have the appropriate skills, tools and a desire to tinker a little with the pieces of iron.

  • Instead of a rear wheel, the best choice for fans of extreme riding on rough terrain, due to the increased strength and reliability of the structure. In this case, good grip of the electric wheel with the surface is ensured, even in difficult conditions. Bicycles with a rear fork motor are great for bumping and slippery surfaces, but you need to take into account the sweep so as not to impair handling. Driving difficulties are most evident when mounting a heavy direct-drive motor-wheel at the rear and installing the battery on the trunk.
  • Instead of the front wheel, this installation of an electric wheel provides the bike with all-wheel drive (electric in front and pedal in the rear), similar speed characteristics and excellent cross-country ability. Mounting the motor from the front is technologically simpler. Often, a compact wheel motor with a gearbox (200-350 W) is used to organize a front-wheel drive, and the battery is fixed on the trunk. If necessary, you can take a gearless electric motor with increased power and weight characteristics, but then it is important to ensure high strength of the fork (you can use the amplifier of the fork pen).