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Free UK standard shipping on orders over £50
The CeramicSpeed T47A Shimano 24mm Bottom Bracket is engineered to elevate your bike’s performance with precision and durability. Designed specifically for frames with a 77mm asymmetrical shell, this bottom bracket combines the oversized interface benefits of BB right with the reliability of a threaded interface, ensuring a secure fit and long-lasting performance. Its unique configuration places the non-drive side bearing inside the frame while keeping the drive side bearing external, optimizing bearing placement for improved efficiency and stability.
Crafted with CeramicSpeed’s renowned hand-built bearings, this bottom bracket offers exceptional smoothness and durability, dramatically reducing friction and power loss during pedaling. The precision dust covers guarantee a snug fit, fully protecting the bearing faces from contaminants and ensuring consistent performance in all conditions. Included in the package are two cups with CeramicSpeed bearings and dust covers, a two-part spacer tube, a packet of All Round Grease, and an exclusive sticker sheet, providing everything you need for an expert installation.
Technical innovation is at the heart of the T47A design, featuring an open standard that supports 24mm diameter spindle cranks while maintaining the benefits of oversized shells and threading. The CeramicSpeed Standard Bearings reduce drag by up to 75% compared to conventional bottom brackets, consuming as little as 0.3-0.4 watts per set due to their hardened-steel races and superior ceramic balls. For even greater performance, the CeramicSpeed coated Bearings offer a 60% longer lifespan and 50% less drag, making them ideal for riders seeking the ultimate in efficiency and endurance. The included All Round Grease can be swapped for specialized greases to tailor drag and durability according to your riding conditions.
Is this bottom bracket compatible with all Shimano cranksets?
It is compatible with Shimano cranksets that use a 24mm spindle diameter and frames featuring a 77mm asymmetrical shell width.
What tools do I need for installation?
The CeramicSpeed Dual Socket Tool T45/T47 16-notch 52.2mm cup tool diameter is recommended for proper installation.
Can I use different types of grease with this bottom bracket?
Yes, the bottom bracket comes pre-greased with CeramicSpeed All Round Grease, but you can switch to Race Day Grease for lower drag or Long Life Grease for enhanced durability in challenging conditions.
Stock Status Instock - Instore - Item Usually shipped or available for shop collection, within 48 hours (Mon-Fri)
Instock - Supplier Warehouse - Item is held in Suppliers Warehouse, Depending on the the supplier transfer time can vary from 24 Hours to 14 Days for item held in European warehouse.
(over festive periods some suppliers shut from 24th Dec-2nd Jan so orders can be delayed through this period.)
Brands held in European website include Trek, Bontrager, Electra, Wahoo, Rapha. For up-to-date transfer times please call customer services on +44 (0)1782 768622
Most out products are shipped by FedEx, providing unprecedented reliability and speed. Lightweight Spares below £25.00 value have a Royal Mail postage option, which is sent via Tracked 48 service. - £2.99
Shipping on all Domestic Orders over £50.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!
Bike and Home Trainers and oversize Goods £15.00 - FedEx
White Glove Bike Delivery - our white glove option has your bike personally delivered to you by a fully trained Mechanic and Bike fitter - £99.99
(Certain bikes will only have this option such as Cargo Bikes)
To Qualify for FREE Shipping:
In some cases, we may ship items out with another courier, depending on the status and availability of items ordered. (Customers will not be charged more and will be refunded any unused postage cost) If part of an order is cancelled and the total drops below the £50.00 free postage, a postage charge may be taken.
Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.
If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by email:store@swinnertoncycles.co.uk or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavor to process your order within 5 working days. Please bear in mind in some cases orders can take longer to process, please contact us for more details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

