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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 Altus 8-Speed 42/32/22 175mm Square Chainset Black
Low Spec Item but does the job.
This chainset is typical of those found on entry level mountain and hybrid bikes, and is all riveted together, so when the teeth wear down, you have to replace the whole lot - including the cranks! But, it won't break the bank and works well enough, and even looks pretty good too!
, the
Shimano Altus M2000 175mm 9 Speed Chainset 40/30/22
Quality product
Good product
, the
Shimano UN-300 BSA 73X113 Bottom Bracket
Great part
Value for price just the rite part I needed thank you
, the
Shimano Tiagra BSA RS500 Bottom Bracket Cups
Excellent kit
Plain simple conversion from 7mm square taper bb to these Hollow Tec bearings
, the
Shimano Claris R2000 170mm 8 Speed Chainset 50/34
Excellent kit
Good bit of kit and very very well priced compared to UK sites
, the
Shimano Deore M6000 175 mm 40/30/22 3x10-Speed Chainset Black
very good quality
very good quality and easy to install
, the
Shimano Claris R2000 170mm 8 Speed Chainset 50/34
Very good Shimano parts
Great as expected from Shimano
, the
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.
, the
Shimano Altus 8-Speed 42/32/22 175mm Square Chainset Black
as described
Does what its supposed to
, the
Shimano Claris R2000 170mm 8 Speed Chainset 50/34
Great upgrade!
Bought to replace FSA Tempo Compact. Groupset is all Claris except for chainring, cranks and BB, so upgraded and very happy with the result! Cannot fault deporevillage, great value and delivery is very quick, why go to AliExpress?
, the
Shimano Tiagra BSA RS500 Bottom Bracket Cups
Great value BB
Bought to replace a square tapered BB that was clicking and creaking. Easy to insert and works very well. Great value and service from deporevillage!
, the
SRAM DUB M18/M30 Crank Extractor Bolt Gold
Does the job
Good quality Correct fitting information
, the
Shimano XT / SLX MT800 C Bottom Brackets C: 68/73
Very good good
Very good great
, the
Shimano XT / SLX MT800 C Bottom Brackets C: 68/73
Excellent quality
genuine shimano
, the
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
, the

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