What are the essential bike parts? Which bike components should you know and possibly upgrade soon? You might be using a bike to commute to work or for fun days out with the family, or you could be on a bikepacking adventure. Whatever you use it for, it is good to understand what brings a bike together and what the different bike parts are.
We are often asked, “What are the components of a bike?” This article will answer that question by explaining the different bike parts, what sets performance bike components apart from basic bike components, and much more.
- Bike parts: High-tech or basics?
- Which are the essential bike parts?
- Understanding component compatibility
- Bike components' price vs performance
- What are the bike components of a bike?
Bike parts: High-tech or basics?
Advancements in technology
Bike parts have greatly advanced over the years, more so in modern times than ever. Although bikes 20 years ago looked very similar to today's, they are entirely different machines.
Frames were generally aluminum or steel. We now have many carbon fiber frames. Groupsets require cables to work. Now, we have hydraulics and electronic bike components, some completely wireless and customizable.
Wheels that needed to be trued often and were hefty are now lightweight and so strong that many cyclists will never need to true them. People tend not to use inner tubes as much but tubeless systems with sealant.
Basic still works
Although technology has come a very long way, and that does come with an extra price tag, basic bikes still work fantastically, and many people choose simplicity over technology. There’s a lot to be said for keeping it simple.
Which are the essential bike parts?
Now for the exciting part. What are the parts of a bike? These are the main bike components. Some types of bikes can differ, and not all bikes have each. A good example is a road bike, which won’t have a rear shock.
First bike component: The frame
The first and most important component to discuss is the frame. This is the centerpiece of the bike, to which all the other bike components attach. It’s vital that every bike has a frame, and different types of bikes have different styles of frames.
They come in all different sizes and materials. Depending on the frame, the bike can be limited to using certain bike components. Road bike frames cannot fit mountain bike tires. The cost of the frame often greatly differs depending on the manufacturing process.
Forks
Next, we have the forks, which hold the front wheel. When they are supplied with a frame, this is classed as a frameset.
"They come in many different types, and depending on the type of bike, they are completely different." - Alice Huot @buycycle
Forks for road bikes are rigid and made to keep the bike aerodynamic and go faster. Forks for mountain bikes (Suspension forks) are made to give the bike extra ability and can compress and expand over bumps.
Choosing the right fork is essential!
Wheels and tires
A bike will also be equipped with wheels. Wheels come in various sizes, such as 26”, 27.5”, 29”, and many more, and in different materials, such as carbon fiber and aluminum.
Tires must match the wheel size and be the correct size to fit inside the frame. They will also need inner tubes or sealants to hold air properly.
Your wheels and tires also have a huge impact on your ride.
Groupset
Then we have the groupset, often called the bike's gearing. This gives the rider the ability to climb uphill at different leg speeds (cadences) and descend much quicker when required.
Groupsets consist of many different parts, such as shifters, cranksets, brakes, chains, derailleurs, cassettes, cables, brake rotors, and even the bottom bracket. These can all be classed as separate bike components.
Sophia Willmes
Finishing kit
We also have a finishing kit on the bike. A finishing kit helps us steer the bike and also allows us to sit comfortably on it. Like the groupset, it is a group of bike components generally picked by the user with the correct sizes.
"The finishing kit is generally considered the seat post, handlebars, bar tape or grips, and seat." - Anja Benson @buycycle
These are all typically unique to the person and bike, as saddles come in many different styles and handlebars come in many lengths. What component holds the handlebars on a bike? This is called the stem.
Accessories
Finally, we have accessories. The accessories are all the little add-ons to the bike that give it a personal touch for the user but are very handy for improving comfort and making cycling a little easier.
Accessories could include a bell, a computer mount, water bottle cages, or lights. Bikes often don’t come with these, leaving it to the end user to pick their own if they want them. They are fairly cheap; you can find them in bike shops or online.
Understanding component compatibility
Specific bike components will work perfectly together, and others will not. One of the biggest challenges for bike builders is getting all the bike components to match up and work. Although this might sound simple, it doesn’t always go according to plan.
Wheel size matters
Let’s go through some examples. In modern times, we have lots of different wheel sizes. 26”, 27.5”, and 29” on mountain bikes, 650b and 700c on gravel bikes, and road bikes 700c and 650c (see our road bike size chart). The frame has to fit the wheel and the added tire to suit with ample clearance.
Brake compatibility is crucial
Brake compatibility is crucial for safety and optimal performance.
Another good example is the brakes. Disc brakes will not work on a rim-brake frame, and rim brakes won’t work on a disc-brake frame. When designing a bike, it must be fit for its purpose, and the parts must all work perfectly together.
Just because you can doesn’t mean you should
Some bike parts will be compatible, but that doesn’t always mean you should assemble them. For example, you could fit flat handlebars on a road bike instead of drop handlebars, but the groupset wouldn’t work, and it would significantly change the bike's geometry.
When building a bike and putting parts together, it's important that they will work properly. We often see bikes that are a mix of many different bits from different bikes, and very rarely do they perform properly, or they come at a cost to make them work.
Bike components' price vs performance
There is a big argument for price vs performance regarding bike components. Some bike parts are incredible upgrades for a bit of money, and you can gain a lot of performance. Upgrading wheels to carbon fiber is a great example.
Generally, if you spend more money, you get better performance. It might be upgrading a frame or getting better gears. It is safe to say that you get what you pay for 95% of the time in cycling.
What are 3 important bike components of a bike safety checklist?
Three important bike components for a safety checklist are:
- brakes
- tires
- lights.
The most important factors when it comes to bike parts are: Do they work properly? Are they safe and attached properly? Do they make any strange noises? If you answer no to any of these, further investigation is required.
How long do bike parts last?
Many variables affect the amount of time bike components last. Firstly, the bike components themselves, with some wearing quicker than others. It is recommended that a chain be changed every 1500 miles on road bikes.
The next factor that affects it is how well it is looked after. If you regularly clean your bike and not just ride hard every ride, you will find that bike components will last a lot longer and that replacements won’t come around as much.
Maintenance is key for bike components
The most important thing is to keep on top of maintenance, keep a clean bike as much as possible, and use branded bike components that last much longer. Some cyclists can get away with a yearly service quite often.
What are the bike components of a bike?
Bike parts are quite simply the parts of a bike that have broken down. If you have the time, it is great to learn about them, and one of the best ways to do so is by stripping and rebuilding a bike.
So, what will be your next bike components upgrade?
Components guide
- Bike components guide: what are the parts of a bike?
- What bike parts to upgrade first?
- How much do bike parts cost?
- Where to buy bike parts?
- What are the main gravel bike parts? Check out our guide to gravel bike components!
- What are the main mountain bike parts? Check out our guide to mountain bike components!
- What are the main road bike parts? Check out our guide to road bike components!
- How to convert a road bike to a gravel bike? Is that even a good idea?
- All things suspension travel
Gearing system
- Everything you need to know about the Shimano Di2
- Shimano Claris review: lifting the lid on the Shimano’s most accessible road bike groupset
- All about the Chinese L-TWOO eRX shifting group
Wheels and tires
- Tubeless tires - What are the advantages?
- Going Tubeless
- Gravel tires on road bike: A genius move or a misguided choice?
- Schwalbe tires recycling
- Everything about the tire size of your bike
Breaks
Pedals
Saddles
- Best MTB saddles: saddle up for the trails
- Best road bike saddle: the seats that can’t be beat
- How to calculate your ideal saddle height
Bags
Electronics
- The best bike gadgets 2024
- The buycycle bike computer test
- Everything about road bike gears
- The bicycle power meter
Bike Maintenance
Others