The Suntour Superbe #BB-91 Axel NOS NEW bottom bracket is a high-quality steel component designed for various bike types including single speed, city, mountain, BMX, and more. With a shell width of 68mm and a spindle type of square taper - ISO, this silver bottom bracket is compatible with BSA (English) threaded systems. This set includes the bottom bracket shell, spindle, and all necessary parts for installation, making it a reliable choice for cyclists looking for durability and performance in their bike's drivetrain. Made in Japan by the reputable brand Suntour, this bottom bracket is a top choice for cyclists seeking quality components for their rides.