Shimano Dura-Ace Lockring
• Black Steel
• 1.29" x 24 TPI Left-Hand Thread
• Fits most hubs, except Campagnolo, Miche or Phil Wood.
Dura Ace has represented the state of art of bicycle components under Shimano since 1973. Over the past 40 years, Dura Ace has tested and developed many excellent components that delivers concentration, control and confidence with slick, fast, accurate performance.