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Bicycle Chainsets & Bottom Brackets

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Do you want to know more about chainsets and bottom brackets?

Chainsets and bottom brackets are responsible for transferring the strength of the cyclist to the chain, which in turn transfers it to the rear wheel of the bike. They consist of one or more chainrings attached to the cranks at the end of which are located the pedals. There is one crank for the right leg and one for the left and they are mounted at 180 degrees from each other, joined by the bottom bracket.

Chainrings are a set of cogs that are responsible for making the bike chain move, transmitting the movement to the rear wheel through the cassettes. There are different sizes of chainrings to increase the drivetrain force and therefore adapt the gear to the different conditions of the terrain being cycled.

The bottom bracket can be described as the heart of the bike, since it is one of the most important parts of the bike, although it is not spoken so much about since it normally cannot be seen. Almost all bottom brackets are airtight and with the joints sealed, they are assembled under pressure and cannot be disassembled, but they can be greased to improve their performance.

These brackets do not allow for much maintenance or repair, which is why if they break,you usually have to replace the entire chainset.


Opinions featured in Bicycle Chainsets & Bottom Brackets

Shimano XT / SLX MT800 C Bottom Brackets C: 68/73
Usual great Shimano quality
The installation adaptor thing is a bit annoying, but you only fit and remove once so not a huge issue.
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SRAM DUB English Thread BSA 73/68 mm Bottom Bracket Cups
Quality fit and finish DUB bottom bracket
Easy to buy, simple to fit to the bike and works really well.
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SRAM DUB M18/M30 Crank Extractor Bolt Gold
Does the job
Good quality Correct fitting information
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Shimano XT / SLX MT800 C Bottom Brackets C: 68/73
Very good good
Very good great
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Shimano XT 1x11 Drivetrain 11/47 32T Chainring Groupset
Unbeatable quality
Very happy with this bit of kit
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Shimano XT 1x11 Drivetrain 11/47 32T Chainring Groupset
excellent quality
top spec groupset at a great price
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Shimano XT / SLX MT800 C Bottom Brackets C: 68/73
Excellent quality
genuine shimano
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SRAM DUB Preload Adjuster Kit
Unbeatable quality
Price is amazing for this item 10/10 very very happy infact I bought two
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Shimano Altus 9x2S 175mm Chainset 36/22
Shimano chainset
Great product got my friends bike up & running again so he's very happy & a good price fast delivery thanks
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SRAM BB30 PressFit Bottom Bracket Cups
BB 30 Press fit
Good quality item good fit.
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SRAM DUB M18/M30 Crank Extractor Bolt Gold
Exceptional
Yes, recommend it
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Rotor BB Press Fit 4130 Ceramic Gold Race Bottom Bracket
Rotor components
Would recommend using them
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Shimano XT 1x11 Drivetrain 11/47 32T Chainring Groupset
Good quality groupset
Easy to set up, well packaged & quality shifting
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SRAM BB30 PressFit Bottom Bracket Cups
Bb cups bearing
Perfect replacement
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FSA PLATINUM ISIS 68 x 108mm Cartridge Bottom Bracket
Seams ok but time will tell.
Not used it yet but it came with instructions on fitting which was good.
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