Description The Sturmey Archer NIG Ball Ring HSA799 is used in their BWR 3 Speed hubs. This is a genuine Sturmey Archer part. Not sure if Sturmey Archer NIG Ball Ring HSA799 is the part you need? We can help! Abbotsford Cycles has been a stockist for Sturmey parts for over 3 decades now, so we know our Sturmey parts. Our catalogue of replacement parts includes both new parts & New Old Stock from our archives. You won’t find a wider range of Sturmey parts anywhere else in Australia! This is because we are a speciality bicycle repair shop that has been building wheels & servicing internally geared hubs for decades. And because we work on Sturmey Archer hubs every day in our bicycle repair shop, we keep all the spare parts here too. Every part that you find in stock on our webshop is in stock in our physical shop in Melbourne. So if you are concerned this is not the right part, or if you need more advice you can get in touch with us anytime. We have access to the exploded diagrams for most Sturmey Archer hubs to confirm which part you need to repair or restore your hub.