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Shimano Claris rear derailleur R2000 short arm
in stock1-2 weekdays
Schwalbe Smart Sam Performance wire tire 27.5x2.35 E25 reflective black
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Shimano Ultegra R8000 Front Derailleur 34,9 mm
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Schwalbe tube 26"x1.00-1.60 (25/40-559) 40mm Auto Valve
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Shimano M6000 40T AN Chainring
Shimano
22,99 €
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Bolt for pedal arm Shimano FC4700, FC4703, FC5800, FC6800
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Prologo Nago R4 3D MSS PAS saddle 137 mm Nack carbon rail 7x9.3mm
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Schwalbe tube 26/27.5"x1.20-1.90 (30/47-559/597) 40mm Dunlop valve
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BBB HighSix OS stem
BBB
45,99 €
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BikePartner Steel Chainring, 44t, 104, Narrow Wide
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Promovec LED Display for SCO E-Bikes
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Shimano Claris R2000 Front Brake
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ABUS 5000 Protectus XCL Click Lock With Wire
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SRAM XX T-Type 12 Speed Chain
SRAM
105,99 €
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SRAM GX Eagle Boost DUB Crankset 32T 165mm
SRAM
119,99 €
Pre-orderExpected 18/08/2026
Shimano Ultegra R8000 Shift Lever Right 11-Speed
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PressFit bottom bracket 84,5 / 86,5 road
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Tube 700x20-28C FV60 20/28-622/-630 BikePartner Without thread
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Rock Shox remote spool and cable stop
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News

Spare parts for bicycles

There are an incredible number of different bikes, and almost all models are made up of different parts throughout several different brands. There are also a great many different spare parts for bikes throughout the categories of gear systems, brakes, handlebars, saddles, tires, tubes, handlebar grips, stems, locks, headsets, frames, front forks, and many other components.

 

Gear systems and brakes

Overall, there are two types of gear systems; external gears and internal gears.

External gear systems have a rear derailleur, cassette, or chainring, and sometimes a front derailleur if there are also gears on the front of the bike. Internal gears have a gear hub, often with 3, 5, 7, or 8 gears.

On external gears, you can have many more gears, since you multiply the number of chainrings at the back by those at the front. So you count all the combinations that can be done on the bike. At the back, there can be up to 12 chainrings at the front, so there are 1, 2, or 3 chainrings on the crankset.

Common to both internal and external gear systems is that there is a shift lever on the handlebars that makes it possible to change gears, most systems work with cable and wire pulls, while other newer systems are electronic.

 

Cockpit - handlebars, stem, seat post, and saddle

The handlebars, the stem, the seat post, and the saddle. The handlebar grips or the handlebars are often called the cockpit of the bicycle.

These components can come in many different shapes and styles, but the commonality is that almost all bicycles have these parts.

 

Handlebars

If we look at handlebars, there are different types of handlebars for different bikes. Handlebars are known to come in different shapes and sizes, such as downward-curved handlebars for racers. In contrast, there are also straighter handlebars that we know from mountain bikes, and in addition, the often more backward curved handlebars that are known for their use in city bikes and everyday bikes. The handlebars on BMX bikes also stand out a bit, as they are often much higher.

 

Stem

In general, there are two types of stems; the ahead-system, where the stem does not go down into the frame's crown tube but it's mounted on the outside of the front fork stem that goes up through the frame. In addition, there is also the "old" type, which is still available on many new bikes, where the stem goes down into the frame and connects to the front fork.

Both types are available in different lengths, in versions that are adjustable, and for different handlebar diameters.

When we talk about diameter, it is obvious to also mention seat posts. When you order a new seat post, it is important to check which diameter you need. There are some measurements that are widely used, but in addition to the most normal ones, there are a lot of other sizes. The most normal is 27.2mm and 31.6mm.

 

Different materials

The handlebars, seat posts, and stems are available in different materials such as carbon, steel, and aluminum.

Handlebar grips and handlebars are also available in different materials: foam, leather, plastic, rubber, cork, etc.

Their most important task is to give you the right comfort when you cycle.

 

If you have questions about the selection of spare parts or need help finding the right spare part, you are more than welcome to contact us.

Then we will do our best to help you.