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Bicycle Chainsets & Bottom Brackets

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579 Item(s)

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

SRAM DUB PRESSFIT MTB 92 mm Bottom Bracket Cups
Top quality
Depot village is top quality as always..
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Shimano Claris R2000 170mm 8 Speed Chainset 50/34
Claris chainset
The Claris chainset is very good value for money very good quality just what I needed
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SRAM DUB PRESSFIT MTB 92 mm Bottom Bracket Cups
Hope bottom bracket
Fantastic to deal with, excellent delivery time , much better than crc in Ireland
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SRAM connecting rod screw left for BB30 M18 / M30
Good price
Perfect original part.
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Spare part SRAM connecting nut BB30 PF30
Good price
Replica part but works well.
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SRAM BB GxP Team 73-68 mm English Thread MTB/Road Bottom Bracket Cups
Top quality bottom bracket.
Not used yet, but top quality product and one of the best prices.
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Shimano XT M8100 1x12v BOOST Cranks 52 mm Black
Looks fantastic!
I’ve not had chance to fit or use the cranks yet, but presented nicely and look like they’ll do perfectly.
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SRAM DUB English Thread BSA 73/68 mm Bottom Bracket Cups
Like for like replacement
The first one I had only lasted 6 months of Irish Winter riding. Hopefully this will last longer over the Summer.
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SRAM GX Eagle DUB BOOST Direct Mount 32D Chainset Grey
Crankset 32 chain ring
Does the job for me
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SRAM DUB PRESSFIT MTB 92 mm Bottom Bracket Cups
Decent quality BB
Seem fairly good these dub BB's last one did 1800 miles in poor UK conditions so a massive improvement over the old SRAM stuff
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Left Hand Crank with 4iiii Potentiometer for Shimano Ultegra R8000 Black
Good quality
It met my requirements
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SRAM X5 GXP 9V 175 44/32/22 black cranks
Good quality
Recommend for Mtb bike
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SRAM BB GxP Team 73-68 mm English Thread MTB/Road Bottom Bracket Cups
Good quality
Recommend for Mtb bike
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Shimano XT M8120 12V SUPERBOOST 55mm Crankset Black
The best bar None!
Don’t need to say much more....it’s XT it’s works brilliantly and looks amazing
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Shimano UN-300 BSA 73X122 Bottom Bracket
Satisfactory
It is a good brand
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