Check the listing for details. SRM Origin Lock Ring. Condition: New. Listed at 10.00 USD. SRM Origin Lock RingThis SRM Origin Lock Ring is used to secure SRM Origin power meters to the spindle. This lock ring fits all SRM Origin spindles. Please note that the SRM Origin Look Ring Tool is needed to change the spindle on your Origin. Why Buy from Power Meter City1. We ship fast! All orders ship on the same day your order is placed!2. We are an authorized SRM dealer and this product comes with a full warranty.3. Expert advice and customer service in case you need any help.4. We offer a free, 30-day return policy on new items. About our CompanyAt Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service. We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.