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![Hope Technology](https://content.westbrookcycles.co.uk/upload/1/merch/3d9d4695_hope-remarkable-logo.jpg)
Hope Technology
24mm Bottom Bracket Non-Drive Side Cup
![Hope Technology](https://content.westbrookcycles.co.uk/upload/1/merch/3d9d4695_hope-remarkable-logo.jpg)
Hope Technology
24mm Bottom Bracket Drive Side Cup
All bikes have bottom brackets, including road bikes, e-bikes, mountain bikes, hybrid bikes and gravel bikes. The bottom bracket of the bike connects the crankset of the bike to the frame - meaning that the crankset can rotate, without the entire frame rotating!
Bottom brackets will typically last for thousands of miles, which can be a couple of years for riders - although bottom brackets on mountain bikes may need replacing sooner, with ingress of mud & grime from the trails - which can be negated by a strict cleaning regimen. The biggest giveaway to a bottom bracket that needs replacing, is a wobbling crank or excessive noise from the bottom bracket.
In some cases, a noisy bottom bracket may not need replacing - it may just need the bearings replacing or greasing.