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Free UK Shipping Over £50 & Easy Returns



Free UK standard shipping on orders over £50
The Shimano Ultegra RD-R8150 rear derailleur redefines precision and reliability for road cyclists seeking top-tier performance. Featuring the advanced Ultegra Shadow design combined with Di2 technology, this 12-speed rear mech ensures shifting is seamless and incredibly responsive—requiring only a gentle touch for flawless gear changes. Its sleek, low-profile construction not only enhances aerodynamics but also minimizes the risk of damage during crashes, making it an ideal choice for both competitive and serious recreational riders.
This rear derailleur serves as the intelligent hub of your drivetrain system, incorporating wireless connectivity to shifters and acting as the central charging point. With ANT+ compatibility, it easily integrates with third-party devices, streamlining your ride’s tech ecosystem. The built-in button allows for easy Di2 operations, while a clear LED indicator displays synchronized shift mode, settings, and battery status at a glance. Crafted with high-tolerance cold forged aluminum and featuring self-lubricating fluorine-coated pivot bushings, it combines durability with ultra-smooth, low-friction gear transitions.
Eliminating traditional mechanical cables in favor of electrical wiring, the RD-R8150 delivers consistent, effortless shifting regardless of environmental conditions, free from contamination or cable stretch. The inclusion of a saver (fuse) function protects the derailleur’s internal structure from impact damage, providing peace of mind on challenging rides. Compatible with wide gear ratios up to 11-34T, this component offers versatility without compromising precision, perfect for any demanding road cycling setup.
Is the Shimano Ultegra RD-R8150 compatible with my current Di2 system?
Yes, it is fully compatible with Shimano’s 12-speed E-tube Di2 electronic shifting systems, making it easy to integrate into your existing setup.
Can I use this derailleur with wide-range cassettes?
Absolutely. It supports wide gear ratios up to 11-34T, allowing for flexibility across varied road terrains.
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.
