How much does it cost to upgrade an 18 speed mountain bike to a 21 speed or 24 speed bike?

It's easier to move up to 21 speeds, and if your rear derailleur is a Shimano Tourney, just buy a 7-speed spinner cassette and a 21-speed shifter. Shimano 7S flywheel + finger dial to buy it in TB for 100 yuan to die.

Upgrading to a 24-speed is more cumbersome, changing the cassette, rear derailleur, rear hub, finger derailleur, crankset and front derailleur can be improvised, but it is better to replace it as well. When buying hubs, pay attention to whether the number of holes is the same as the number of holes in your rim, otherwise you will need to change the rim.

If you insist on going up to 24 speeds, it is recommended that you go straight to 27 speeds. Because there are as many things that need to be replaced, the price difference between the Shimano 27-speed M390 package and the brand's 24-speed package is very small. **700 yuan can buy M390 kit, including crankset, flywheel, finger dial, rear dial, front dial, bottom bracket, finger dial and chain, and then spend about 200 yuan to pick a card fly hub.

In total, about 900 can be changed to a 27-speed one.

The whole wheel set is replaced, 200 (** of the Quantum ball hub + DP20 or DH19 rim, the rim is said to be fake).

Then the micro rotation 24-speed small set + chain + flywheel up to 200 pieces, if the 27-speed micro rotation 27-speed small set + Japanese Chi flywheel + any chain = 250 inside.

Then the brake handle depends on the situation, and if you change it, it will be within 30 days.

It is less than 500 in total.

The 18-speed low-end car is enough to change the slight change speed, and there is no need to change to a more expensive one.

If you dismantle the old parts, you can sell as much as you want.

Honestly....There is no need to change to a 24-speed car with an 18-speed car....Because the 18-speed configuration itself is not good...Maybe a big 24-speed kit is more expensive than your car...It's better to change cars...Merida and Giant are good.

The difference between the 21-speed, 24-speed and 27-speed bikes is the different types of shifts and the number of chainrings that fly backwards.

First, the type of transmission is different:There are 21 shifting combinations for the 21-speed, 24 shifts for the 24-speed and 27 shifts for the 27-speed. The higher the number, the faster the speed, the 21-speed is the first three gears and the second seven gears, the 24-speed is the first three gears and the last eight gears, and the 27-speed is the first three and the last nine gears.

21,24,27 refers to the bicycle's shift ratio, the front ** is 3 discs corresponding to three gears, the back is 7 to 9 flywheels, 21-27 speed, 21 speed is the least applicable speed and adjustability, 27 speed is the highest speed and adjustability, the difference between 21 speed and 27 speed when climbing is shown, so that you climb more comfortably, easier to exert force, 27 speed ** is also a lot higher than 21 speed, the cost performance is relatively high is 24 speed.

Second, the number of chainrings of the rear flight is different:The number of chainrings is 7 for the 21-speed rear flight, 8 for the 24-speed rear flight, and 9 for the 27-speed rear flight.

21-speed chainring, 48-38-28, flywheel, 14, 28

24-speed chainring, 42-32-22, flywheel, 11 30 (11 32).

27-speed chainring, 44-32-22, flywheel 11 30 (11 32).

The number of chainrings divided by the number of flywheels is the gear ratio.

21-speed maximum gear ratio, minimum gear ratio 1

24-speed maximum gear ratio, minimum gear ratio.

27-speed maximum gear ratio 4, minimum gear ratio.

3. Say goodbye

The 21-speed is the first three gears and the second seven gears, the 24-speed is the first three and the second eight gears, and the 27-speed is the first three and the last nine gears.

21,24,27 refers to the bicycle's shift ratio, the front ** is 3 discs corresponding to the third gear, the back is 7 to 9 flywheels, 21-27 speed, 21 speed is the least applicable speed and adjustability, 27 speed is the highest speed and adjustability, the difference between 21 speed and 27 speed when climbing is shown, making the climb more comfortable, easier to force, 27 speed ** is also a lot higher than 21 speed, the cost performance is relatively high is 24 speed.

The higher the number, the faster it will be. Speed difference refers to the number of different gear ratios matched with the front and rear gears; That is, for example, the front crankset of a mountain bike is usually 3 pieces, and the rear cassette can be a piece of the wheel, so the speed ratio can be 3 times 7 equal to 21 speed, 3 times 8 equal to 24 speed and 3 times 9 equal to 27 speed. If it is enough to travel only 21 speeds, 24 speeds and 27 speeds will be much more expensive, and there is not much difference between travel.

Summary: The 21-speed bicycle is mainly used for commuting riding, suitable for relatively flat roads, 24-speed is generally used for short trips and exercise, more suitable for suburban riding, 27-speed can be used for long-distance riding, and the speed is more suitable for complex roads, but it is best to wear a helmet and protective gear when riding, try to ride in sunny weather, and slow down on unfamiliar road sections.

The number of shifts that can be combined with the front and rear chainrings. 3x7 is 21-speed, 4 8 is 24-speed, and 3 9 is 27-speed.

Precautions for cycling:

Riding gear to wear:

Wear the necessary equipment before cycling, such as helmets, knee pads, wrist pads, etc., to protect your body from accidental falls, so remember to wear gear.

Check the condition of your car in detail

Before cycling, carefully check the various parts of your bike, such as brakes, tire pressure, transmission, etc., to ensure safe riding, and at the same time, it can also prevent us from being helpless on the road.

Always be aware of the vehicles around you:

Many tragedies are caused by carelessness, when turning a corner or when there are vehicles passing by, you must pay attention to the surrounding vehicles, and slow down, do not engage in dangerous movements, in order to prevent traffic accidents.

Project History:

Mountain biking originated in 1977 by Scott, a student at the University of California, USA, who converted ordinary bicycles, and was derived from the development of a model that drove a bicycle on an off-road course for motorcycle racing. Later, it gradually formed a form of sports and became popular in Europe and the United States.

In 1979, a company was founded under the name "Ricky Mountain Bike", which is how the name "Mountain Bike" came from.

In 1983, the American Mountain Bike Championship was held.

With the boom in the mountain bike market, professional teams began to be formed. In 1987, the first major competition was held in Europe, an unofficial mountain bike race in France.

In 1988, the German company Grundig Electrical Manufacturing organized the "Grundig Challenge Cup" across Europe.

In 1990, the International Cycling Union announced the recognition of the sport.

In 1991, the Mountain Bike World Cup was held for the first time in San Francisco, USA.

In 1996, it became an official Olympic event.

If it is the same brand of mountain bike, the same brand of transmission, 21-speed and 24-speed without considering other configurations, the main differences are as follows:

The first is whether the shifting is flexible. You may not feel it on a normal road, but you can feel it when you step on an uphill road.

Second, there is a difference between the 21-speed and the 24-speed finger pluck and model. The more advanced the better, and the more reasonable the design.

In ordinary use, especially on urban roads, both transmissions are about the same, nothing is noticeable. If you're on a mountain trail and have a lot of uphill climbs, the 24-speed transmission has a clear advantage.

Summary. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions, will provide you with a satisfactory answer! I hope this service can help you, if it is helpful to you, I look forward to your praise and attention.

The 27 speed is better, more labor-saving, and the usual flat speed is faster. The main difference between the 24-speed and the 27-speed is that the 27-speed front chainring has been adjusted from 42 to 44, so that the nine gear ratios under the large chainring are larger than those of the 24-speed. And the 24-speed and 27-speed are different, the 27-speed has more gears and smoother shifting, and the car's various accessories have also been upgraded to better models.

It should be noted that the flywheel of the 27-speed car is generally the same as that of the 24-speed car, and the minimum gear ratio is the same. The speed ratio just gives the rider more opportunities to choose, the speed depends on their own leg strength and endurance, I hope my answer can help you!!

Which is better, 24-speed or 27-speed mountain bike 21-speed and easy to use?

Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions, will provide you with a satisfactory answer! I hope this service can help you, if it is helpful to you, I look forward to your praise and attention. The 27 speed is better, more labor-saving, and the usual flat speed is faster.

The main difference between the 24-speed and the 27-speed is that the 27-speed front chainring has been adjusted from 42 to 44, so that the nine gear ratios under the large chainring are larger than those of the 24-speed. And the 24-speed and 27-speed are different, the 27-speed has more gears and smoother shifting, and the car's various accessories have also been upgraded to better models. It should be noted that the flywheel of the 27-speed car is generally the same as that of the 24-speed car, and the minimum gear ratio is the same.

If it is said to be strong and durable, the failure rate is low, which one is better?

Which is more rugged or 27-speed, 21-speed or 27-speed, with a lower failure rate?

The key to this depends on your own use, if you use it more, choose the 27-speed. To put it simply, go for the 21-speed.

Summary. Hello, I'm glad to answer for you I'm your car master exclusive technician Concentrate on your intentions and sincerely answer your car questions, and find solutions and methods for you to ask questions as follows: The difference between 12-speed and 24-speed is that the gears are different.

The following is an introduction to the 24-speed: 1. Introduction: The 24-speed is a 3*-speed transmission system, which uses 3 cranksets and 8 flywheels to form 27 gear ratios.

It is characterized by a delicate gear ratio and a high gearing ratio. 2. Advantages: 24-speed durability.

It can only be reflected when going uphill, because the 24-speed has many gears, so it will save effort when going uphill. 3. Materials and workmanship: The speed and transmission of the 24-speed car correspond to the entry-level level, the workmanship is average, and the aluminum materials are average, so the weight is heavy and not very durable, and there will be obvious deformation and discharging when climbing the slope.

Hello, don't click to end, I'm textual to give you the full answer, 2-3 minutes.

Hello, I'm glad to answer for you I'm your car master exclusive technician Concentrate on your intentions and sincerely answer your car questions with the source, and find the solution and method for you to ask the question as follows: The difference between 12-speed and 24-speed is that the gear is different. The following is an introduction to the 24-speed

1. Introduction: 24-speed is a 3*-speed transmission system, using 3 cranksets and 8 flywheels to form 27 kinds of gear ratios. It is characterized by a delicate gear ratio and a high gearing ratio.

2. Advantages: 24-speed durability. It can only be reflected when going uphill, because the 24-speed has many gears, so it will save effort when going uphill.

3. Materials and workmanship: The speed and transmission of the 24-speed car correspond to the entry-level level, the workmanship is average, and the aluminum materials are average, so the weight is heavy and not very durable, and there will be obvious deformation and discharging when climbing the slope.

1. The transmission ratio is different.

21-speed maximum gear ratio, minimum gear ratio 1

24-speed maximum gear ratio, minimum gear ratio.

2. The speed is different.

The higher the gear ratio, the more power output, and the faster the speed. The 24-speed is faster than the 21-speed.

3. The uphill advantage is different.

The more speeds, the more advantageous the uphill climbs, and the 24-speed has an advantage over the 21-speed uphill.