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No Hassle Returns
With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.
Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!
With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.
So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.
Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.
The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.
Call us if it's a bike as we can help arrange collection. Tel 01752 849315 or info@certini.co.ukPlease fill in the downloadable returns form to complete and return with your goods.CLICK HERE TO DOWNLOAD THE RETURNS FORMReturns Address:
Brand:Shimano
Code:34R 9807
The Shimano Nexus SG-8R20 Ball Retainer (3/16" x 13) is a genuine Shimano replacement part designed for maintaining smooth, reliable performance in your Nexus internal gear hub. Engineered to Shimano’s high-quality standards, this wheel hub ball bearing retainer ensures optimal bearing alignment, reduced friction, and long-lasting durability for urban bikes, trekking bikes, and commuter bicycles.
This Shimano Nexus hub spare is listed as product number 19 in the SG-8R20 exploded diagram and is essential for keeping your internal gear hub running efficiently. Its precise 3/16” x 13 bearing configuration delivers consistent performance, making it an ideal choice for cyclists seeking smooth gear shifting and low-maintenance riding.
Ideal for riders who want to keep their Shimano Nexus hub performing like new, this high-quality ball retainer is a small but essential component for wheel hub servicing and long-term reliability.
General Unisex Brand Information