Sugino NJS lockring
Made of hardened steel and featuring a stepped design that prevents the chain from making unwanted contact with the lockring when using a 12t cog.
Of course, you can use this lockring with other size cogs too but it's not really necessary.
• NJS stamped
• standard 1.29"x24 tpi left-hand threads
• phosphate black finish
This will not fit Campagnolo, Miche, Mavic or Phil Wood hubs so don't bother trying!