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Shimano BB-7700 Dura-Ace Bottom Bracket

From £53.75
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Product Description

Precision engineered Dura-Ace 7700 bottom bracket for road Octalink splined system.

Key Features:

  • 22 mm diameter chrome-moly hollow pipe billet axle reduces weight
  • Splined interface gives a more rigid crank assembly compared to tapered counterparts
  • Compound bearing structure - ball and needle bearings support the spindle to reduce flex
  • Maintenance-free sealed cartridge design prevents corrosion and is easy to install
  • Average weight 173 g


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Bottom Brackets Guide

What is a bottom bracket?

A bottom bracket is the bearings that the crank axle passes through, keeping the cranks turning smoothly.

Who needs a bottom bracket?

Every bike has a bottom bracket, so if your bike is creaking or feels stiff or notchy as you turn the pedals, your bottom bracket might be worn out and need replacing.

What are the choices?

It’s not so much a choice as a matter of compatibility. You need to establish whether your bottom bracket is press-fit or threaded and what size. Then you need to make sure it is compatible with your crankset. If it’s worn out, replacing like for like is often the easiest thing to do.

What should I buy with it?

You need some specialist tools both to fit and remove bottom brackets and to remove the cranks to get at it.

Anything else?

If you’re fitting a bottom bracket into a brand new frame, your frame will need some preparation first. Bottom bracket shell facing tools can be very costly, so you might need to bring it into a bike workshop to get this done.

Delivery & Guarantee

UK Delivery Information

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns.

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

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