How to change the rear wheel on a speed bike
First we decided to tighten the knitting needles. There are special ways to do this at home. For those who are interested, it is enough to search the Internet for how to fix the G8. A closer inspection revealed that a pair of spokes was missing. The plastic spoke guard installed on the wheel makes it difficult to install new ones, so it must be completely disassembled.
Turn the bike upside down, unscrew the eccentric clamp nut, remove the eccentric itself from the hole in the axle, release the footrest, remove the chain and wheel. In this case, you need to loosen the brake pads and release air from the wheel so that the tire does not cling to them.
How to fix play in rear bicycle wheel
Unscrew the nipple, pull out one side of the tire, gently prying it off with a flat screwdriver, without tearing the camera. Take out the camera, then remove the tire.
Now you need to remove the asterisk. It is impossible to do this without a special puller, so we took care of its purchase in advance.
Inserts the puller inside the sprocket and unscrew it with a gas wrench. By the way, for these purposes, any key for 24.
Our speed bike had a single rim wheel. Almost all modern bikes are equipped with double rim wheels. It is believed that they are stronger and more reliable. The difference in price is not very big, so we listened to the seller and bought a copy with a double rim.
At first, the plan for replacing the rear wheel on a speed bike seemed simple: screw the sprocket onto a new one, insert the tube, insert the tire, and mount it on the bike. But upon closer inspection, it turned out that the wheel axles are different. The old one. with a hole inside for the eccentric, and the new one. without it.
Therefore, I had to rearrange the axle from the old wheel to the new one. This requires 2 keys. We hold the locknut with one, and unscrew the other with the other. Having unscrewed, remove the washer and unscrew the locknut, which is the bearing boot. When unscrewing the nut, watch out for balls that may fall out of the gap formed. Now you can remove the axle.
In the same way, we remove the axle from the new wheel. The grease in it is fresh, thick, so the bearing balls, sticking to it, were in their place.
Carefully, adding fresh grease, insert the axle with a hole for the eccentric onto the new wheel and tighten the nuts in the reverse order.
It is necessary to tighten the nuts with a cone for the bearing until there is no play in the carriage, but at the same time the wheel rotates freely. On both sides of the axle along the edges, we leave a space equal to 1 cm so that it fits into the eyes of the rear fork of the bicycle. This distance is adjusted with a bushing washer. By tightening the second nut, we fix the first with a key so that it does not move, otherwise the wheel will spin with effort.
Then we collect everything in the reverse order. We install the protection of the spokes, with the help of a puller we twist the asterisk.
On the one hand, fill the tire, insert the camera, fill the tire completely. We pump the chamber with a pump, then bleed the air so that it fits into place.
Now we take the wheel, put the chain on the sprocket and install the axle in the eyes of the fork. The tire, having pressed on it, must be pushed between the brake pads.
Install the footrest, insert the eccentric clip and secure it with a nut.
Let’s adjust the brakes by fixing the pads near the rim. We pump up the camera and make a test drive. This completes the replacement of the rear wheel of the sports bike. If you liked the article, share it on social networks.
The high-speed bike has a multi-stage transmission, which fundamentally distinguishes it from the classic bicycle with one gear. A big problem for singspeed (single-speed) is steep and long climbs, especially without a perpendicular slope of the road. The low gears of the high-speed bike reduce the speed, but make it possible to overcome the hills without additional power costs. High gears allow you to accelerate the bike on level ground, and it will outperform singlespeed in speed.
How to remake Singlespeed
Let’s try to turn a regular bike into a high-speed one with a single shifting system. For this you will need:
- non-brake bushing;
- v-brakes or pliers, front and rear;
- rear cassette 6 stars;
- two chains for a high-speed bike;
- switch cable;
- squeezing the chain;
- cassette remover;
At the very first stage, you should choose the type of brakes, which we will then install on the bike. We look at the feathers and the fork. if they do not have seats for the brakes (they are not provided on classic frames), then we purchase pliers. If there are sockets, we take v-brake. Another, more complicated, option is to place a similar fork under the vectors, and put a tick back. In this case, you will have to remove and change the plug.
How to convert a single speed bike into a multi speed bike. step by step instructions:
Remove the rear wheel with a wrench and disassemble it.
Open and remove the circuit. you will no longer need it.
Make one of the two chains, with 128 links for a 6-speed cassette. To unclamp additional links to the standard chain and connect them, you will need a squeeze.
Next, you need to put a non-brake hub in the rear wheel. The work is divided into 3 stages: dismantling a conventional bushing, re-spacing the wheel and installing a new bushing. It is quite difficult to do the repositioning, therefore it is better to entrust this work to the master. A simple option is to purchase a ready-made wheel with a 6-star cassette.
If you install the sprockets yourself, you will need a cassette remover.
It will not work to put the rear wheel on the stays of a standard frame. the speed hubs are wider. To do this, you need to unclench the feathers by 2-3 cm.This is easiest to do on the machine.
The next step is to install the derailer. the rear derailleur. Choose a device with an axle mount, because no special attachment for classic frames.
Apply front brake. standard procedure.
The front sprocket on single speed bikes has thicker teeth so the speed chain will not fit. We remove the star paired with a connecting rod, grind the teeth on a milling machine.
Assemble the bike: place the wheel on the feather dropouts, the chainring on the bottom bracket and clamp the chain.
When the rear wheel is in place, apply the rear caliper brake.
Installing the rear shifter for the derailleur on the right side of the handlebar.
Connect the shifter and the switch, fasten the cable to the upper tube of the frame with clamps.
By changing the configuration of the transmission and installing a new braking system, a simple bike can be turned into a high-speed.
What are high-speed bicycles
By the type of transmission, bicycles with speeds can be divided into three types:
How To Lift Your Rear Wheel | Mountain Bike Skills
- with double shifting system: mountain bikes, road bikes and hybrid bikes;
- with a single gear system. high-speed road models;
- planetary velocity models.
The dual gearshift system has two star systems. at the front at the bottom bracket and at the rear hub. For the chain transfer along the front and rear sprockets, the corresponding switches are responsible. front and rear. Standard systems:
- 3 x 7;
- 3 x 8;
- 3 x 9.
There are several rear sprockets for one chainring: a large chainring in front is combined with small rear ones, and vice versa. Average values such as 2 x 5 are commensurate with the gear ratio of a single speed. The switches are controlled by shifters located on the steering wheel: on the left. front, on the right. rear switch.
A single gearshift system includes only the rear cassette, one derailleur and, accordingly, one shifter. In front, the chain only runs along one leading star, like on a single speed.
City bicycles with speeds make it possible to move more comfortably on roads with inclines, have a more developed braking system. front and rear v-brake versus the rear drum brake of a conventional bike.
It is worth noting that in the city high-speed roadways run better than mountain ones: there are high gears, large wheels, the geometry is sharpened for movement on flat roads.
The planetary gearshift system is located in the rear wheel hub. The planetary hub transmission combines the characteristics of single shift and single speed systems:
- rear derailleur shifter;
- one front and one rear sprocket;
- the chain is short, runs straight.
Gear shifting is carried out while coasting, in contrast to the classic system, where the chain is thrown over the stars when pedaling.
- the mechanism is completely protected from dirt, water, dust;
- does not require maintenance and repair;
- more convenient to change gears.
Disadvantages of planetary hubs: significant weight gain, high friction and low endurance of mechanisms, high price of the bike. Taking this into account, it is advisable to use the planetary only in urban driving conditions and on suburban highways.
Advantages and Disadvantages of a Speed Bike
For trips around the city on flat roads and simple rides in parks and embankments, the presence of a high-speed bike is not essential. A simple one-gear touring bike is fine here: it is both cheaper and does not require frequent maintenance.
Another thing is long trips on highways, dirt roads and, even more so, off-road. Here you will need a more stable bike that will pass under any conditions, save energy, and make the trip more comfortable. It is difficult to imagine a long tourist route on single speed, to put it mildly, although, in principle, nothing is impossible.
Compared to a single-speed model, a bicycle with a multistage transmission has several advantages:
- climbing hills in low gears;
- less power costs in a headwind;
- acceleration on flat areas;
- maximum accuracy of adjusting the bike to specific riding conditions (especially on models with a large number of gears);
- constant cadence, less fatigue;
- the braking system of high-speed bikes is more powerful than singlespeeds.
Let’s see from the other side, where single-speed models outperform their rivals:
- the bike is cheaper;
- undemanding to maintenance of the transmission: the chain and sprockets are designed for almost the entire life of the bike;
- in case of replacement of the chain, it is easily rubbed against the old stars;
- singlespeed gives a good workout for all leg muscle groups on the rise;
- allows you to develop the skill of high-frequency pedaling.
The controversial advantage of the single-speed model is the reduction in weight due to the absence of switches and cassettes. Only valid when comparing identical models with and without cassette. To put in one row, for example, a light road bike with speeds and a steel road bike in this sense is wrong.
Tips for choosing a bike with speeds
Today, high-speed bicycles prevail on sale, so there is plenty to choose from. All classes fall into this family:
- road bikes;
- road bikes.
To choose the right speed model for yourself, you need to decide where and on what routes you plan to drive. For example, for city riding, you do not need to take a professional mountain or road bike with a lot of gears, a classic road model or a bicycle on a planetary hub will suffice. However, the latter are distinguished by an overpriced.
In addition to the purpose of travel, cost plays an important role, and both of these factors are closely related to each other. For trips in aggressive driving and tourism conditions, you should not save on the model. you will have to spend more on maintenance and rework. If the goals are modest, for example, to roll out 50 km a couple of times a week, then you can choose an inexpensive model. it will be economically justified. And of course, we pay attention to brands and fakes for them.
The bike should be comfortable to travel. Multi-speed models make it possible to evenly distribute efforts, make movement more comfortable. But do not forget about such an important parameter as the size of the frame. It must fully correspond to the height of the cyclist. There are size tables for verification, and of course, we draw attention to our own feelings on the “fitting” of the bike.
Frames are divided into male and female. The latter are designed for the convenience of cyclists to get off and on the bike. In principle, both male and female frames will be comfortable for men, but women on male frames would be uncomfortable.
Taking into account these simple recommendations, you will be able to choose a bike that suits you and enjoy riding for more than one season.