Best Bike Derailleurs

Shimano Dura Ace Di2 9 Speed Rear Derailleur


1) Easy to change gears with the shifter.

(Easy to use shifters are very popular among commuters.)

2) Very durable, it can handle heavy loads without breaking down.

(It’s made from high quality materials which make it last longer than other types of derailleurs.)


1) Pricey, but not too expensive.

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(You can get one for around $150).

2) Not recommended if you have small hands or weak fingers.

(The shifter is quite large and may take some time to learn how to operate.)

Dura Ace 10 Speed Rear Derailleur


1) Has a larger gear range compared to other brands.

(More gears means more flexibility when shifting between them quickly.)

2) Can be used with any type of bicycle.

(If you want to ride a fixed gear bicycle, then go for the Shimano Dura Ace 10 Speed.)

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3) Is very easy to maintain.

(There are no tools required to adjust the gearing.)

4) Does not require special tooling.

(It uses standard metric threads so it will fit almost all bicycles.)


1) Requires a bit of practice before getting used to operating it.

(Be patient with yourself when you first start using it, because it does take a little time to get used to it.)

2) You will have to use your hands when shifting the different gears.

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(This is not really a concern for most people, but if you need to go somewhere quickly and do not want to waste time shifting, then this is not the best choice for you. It may take some getting used to if you are not used to using this type of derailleur.)

Shimano Dura-Ace Freewheel


1) Easy to install, no need for special tools.

(You do not need a fancy tool to remove or install the rear wheel of your bicycle.)

2) Can be shifted while the bicycle is moving.

(You can quickly shift while riding without having to use your hands. This is a great feature for people who commute a long distance to work everyday, because it can help save time on your commute. If you use your hands to shift, then your hands will get tired, and this can become very dangerous if you suddenly need to brake quickly.)

3) Is compatible with most bicycles.

(You are not limited to using only one type of bicycle, because it is compatible with almost all types. You can use it on a racing bike, a mountain bike, or even a tandem bicycle.)

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4) Even if you ride really far, you will not get tired using it.

(Some people have reported that they could ride for days without getting sore because of the comfort and ease of shifting with this type of derailleur.)

5) Easy to match.

(You can easily match the color of your new rear derailleur with the color of your bicycle.)


1) It is not the cheapest type of rear derailleur.

(While it is more affordable than some other types of rear derailleurs, it may still be too expensive for some people. Most people can afford it though. It really just depends on what types of bicycles you were looking at before discovering this one.)

2) Not good for hilly areas.

(If you live in a hilly area and have a hard time riding up steep hills, then this is not the best type of rear derailleur for you. You will have a difficult time getting your bike to shift to the right gears when going uphill. This can cause a lot of frustration when trying to ride your bike, so you might want to get a different type of rear derailleur that is better equipped for hilly areas.)

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3) Does not come in purple.

(If you really wanted to match the color of your new rear derailleur with the rest of your bicycle, then you are out of luck. It only comes in black or silver. If you do not care about the color though, then this should not be a problem for you at all.)

Shimano Dura-Ace Freewheel

As with all types of bicycles, there are advantages and disadvantages to using one. The key is to decide for yourself which advantages and disadvantages are more important to you and your lifestyle. After you have figured out what is most important to you, then it will be easier to choose the right one.

Here are some pointers on how to choose the best rear derailleur for you.

How Often Will You Be Riding?

If you plan on riding your bicycle every single day, then you need to make sure you get a rear derailleur that can withstand a lot of wear and tear. You will most likely be riding in all different types of weather conditions, which can cause your parts to wear out quicker.

What Is Your Budget?

Budget is another important factor to consider when choosing a rear derailleur. Road bicycles can get very expensive, especially the higher quality ones. Luckily you do not have to spend a lot of money to get a high quality rear derailleur. There are some affordable ones that are of good quality. If you are on a tight budget, then you should be able to find a suitable rear derailleur for your needs.

How Many Gears Do You Need?

The more gears a rear derailleur has, the more it is going to cost. You do not need a rear derailleur that has a lot of gears for everyday riding. If you just need a simple gear change, then there are cheaper rear derailleurs that can get the job done.

How Easy Is It To Shift?

Some rear derailleurs are much easier to shift than others. If you want a easy to use rear derailleur, then you will have to pay more money. Once again, you do not need to spend a lot to get an easier to use rear derailleur. There are some affordable ones that can shift with just a flick of the wrist.

Are You Going To Upgrade?

If you do not like the first rear derailleur you buy, then you may want to upgrade. If you know you are going to upgrade in the future, then it may be best to buy a cheaper rear derailleur to begin with. That way if you do end up upgrading, you will not feel as bad about spending more money.

Do You Need A Compact Or Triple?

There are two different types of rear derailleurs. There are compact and triple. A compact is good for people who don’t like a lot of things hanging off their frames. People who don’t want a lot of weight dangling from their bikes usually prefer compact ones as well. A triple is good if you need more gears. Most road bikes have triple gearing nowadays, especially the higher quality ones.


Aluminum, titanium, steel, carbon fiber and ceramic are all materials that road bicycle parts can be made from. Each material has its own advantages and disadvantages.

Aluminum is one of the most common materials for making bicycle parts. It is very light weight which would seem to make it ideal for bicycles, but it is also quite flexible. This causes some problems with shock absorption on bumpy roads, which can be uncomfortable for riders. It is also cheaper to produce than other materials which causes companies to prefer using it.

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Titanium is denser than aluminum and much more durable. Unfortunately, it is also quite a bit heavier, which would make riding uncomfortable. It costs more to produce than aluminum as well, so it is not used as often. Some high-end bicycles have parts that are made from titanium though because of its superior strength and reduced weight.

Steel is heavier than both aluminum and titanium, but it is also much stronger. It is a good material for making bicycle frames, especially the tubing that makes them up. It can be bent into different shapes to make it easier to produce different elements of bike frames. Steel is cheap to mass produce which makes it a popular material for mass produced bicycles.

Carbon fiber is extremely light weight and very strong. For that reason, it is the most common material used for making bicycle frames. It is also easy to mold, which makes it popular among frame manufacturers. The problem with carbon fiber is that it is expensive to produce and not all companies are able to manage the complex manufacturing process.

Ceramic is extremely dense, heavier than even titanium. It is very brittle though and breaks under just about any stress. This makes it terrible for making bicycle frames, but companies have managed to make bearings, bushings and other small parts out of the material. These parts are much lighter than their metal or plastic counterparts and can withstand higher temperatures.

Riding Style

Riding style is important when choosing a rear derailleur. Shifting performance is very important for racers. The slightest lag in between shifts will lead to them losing races. Recreational riders and people who simply want to make the process of pedaling their bikes less tedious don’t need to worry as much about performance.

They just need a derailleur that changes gears fast enough that they are satisfied with it.

Materials are important for all riders though. Cheap materials can lead to failures that result in damages to frames and other components. Some of the more expensive materials like titanium and carbon fiber can help to keep the weight of bicycles down to help increase speeds and make rides more comfortable.


There are three main types of gears that are used in bicycles: mountain, road and track.

Mountain gears are the most basic. They are very strong and can handle lots of abuse from riding on very rough terrain. The trade off is that they are quite heavy and aren’t the best at changing gears quickly.

Road gears are much lighter than mountain gears. They are much better at shifting between different gears quickly, but they aren’t as strong and aren’t able to handle as much punishment. For riders who only take leisurely rides on the weekends, these are a good option.

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Track gears are the lightest available. They also shift very quickly between gears. These are usually only found on bikes used for racing because of their high price tag. They aren’t designed to withstand heavy impact or rugged terrain.

Gear Range

Bicycles can have a very wide range of gear ranges. Some have as few as three gears while others have over a dozen. The vast majority of bicycles have gear ranges of seven or more gears. Most average riders don’t need more than three gears and only expert riders will need more than seven.

Multiple gears allow riders to tackle different types of terrain. A single ride may involve quick bursts of speed to get up a steep hill, cruising along a highway and then making your way through heavy traffic during your trip into the city. Having a large gear range allows you to handle all of these situations without having to get off your bike and walk.


Bicycle gears cost anywhere from $80 up into the thousands. The type you need depends on how you plan to use it and how much you want to spend. Mountain bikes, for example, are rugged enough to handle rocky terrain and can be used for basic transportation. They usually cost between $300 and $500.

Sources & references used in this article:

International Journal of Modern Trends in Engineering and Research by J Beer – Learning

Electronic gear-shifting system by E Furia – 2010 – Rodale Books

Schwinn: The Best Present Ever by T Bike –

Bicycle derailleur and actuating system by RED SRAM –

From Marin County’s seventies clunker to the Durango world championship 1990: a history of mountain biking in the USA by D Rauf – 2017 –

Mountain Bike Magazine’s Complete Guide To Mountain Biking Skills: Expert Tips On Conquering Curves, Corners, Dips, Descents, Hills, Water Hazards, And … by SH Patterson, JD Cheever, MW Larson – US Patent 5,620,383, 1997 – Google Patents