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Free UK Shipping Over £50 & Easy Returns





Free UK standard shipping on orders over £50
The FSA Ebike Chainset CK-320 ISIS 27.5mm Black is a high-quality component designed specifically for e-bike enthusiasts seeking reliable performance and durability. Crafted from die-cast alloy, the crank arms provide a perfect balance of strength and lightweight efficiency. Available in multiple lengths (155, 160, 165, and 170mm), this chainset offers versatility to fit a variety of rider preferences and bike setups.
Featuring an ISIS Drive system, the CK-320 ensures smooth power transfer and compatibility with popular e-bike motors such as Bosch G4, Brose MAG, Yamaha PW-X2, and others. Its bead-blasted black finish not only enhances the aesthetic appeal but also adds a layer of protection against wear and corrosion. With a weight of 503g per pair, it maintains a lightweight profile without compromising on robustness.
Before installation, it’s important to consider the QFactor and clearance dimensions to ensure proper fitment with your bike’s chainstays and motor system. This precision makes the FSA CK-320 an excellent choice for upgrading or replacing your e-bike’s crankset with confidence and style.
Is the FSA CK-320 compatible with all e-bike motors?
It is compatible specifically with ISIS Drive systems from motors such as Bosch G4, Brose MAG, Yamaha PW-X2, Fazua, Nidec, Polini, and SACHS. Compatibility depends on matching QFactor and clearance measurements.
How do I choose the right crank arm length?
Select a length between 155mm and 170mm based on your riding style, leg length, and comfort preferences. Proper sizing improves pedaling efficiency and reduces fatigue.
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.








