QR Code Link to This Post Here is one tough replacement chain for your BSA C15T, and C15S motorcycles, with standard gearing. These chains are manufactured to the same specs as your original. They are manufactured by a major producer of motorcycle and power sports chains. This chain is 1/2 inch pitch X 5/16 inch inner plate width.If you have any further questions please call Dan, the number is listed above. do NOT contact me with unsolicited services or offers