The Shimano Dura-Ace HB-7600-R is the definitive rear track hub for serious fixed-gear and keirin racing. With its iconic high-flange body and NJS certification, this hub has been the choice of professional keirin riders in Japan for decades — built to Shimano's highest standards for precision, durability, and lateral stiffness under sprint loads.

Highlights

• NJS Certified: Officially approved for Japanese keirin racing — a mark of the highest quality and safety standards in track cycling.
• Hi-Flange Design: Large 67mm flange diameter increases spoke bracing angle for a stiffer, more responsive wheel build.
• Flip-Flop Threading: Both drive-side and non-drive-side are threaded, allowing a fixed cog on one side and a freewheel on the other for versatile fixed/fixed or fixed/free setups.
• Premium Bearing System: Borozon-treated cup-and-cone races paired with stainless steel ball bearings for smooth, long-lasting roll.
• Chrome Steel Axle: Solid chromoly axle with flanged track nuts for secure clamping in horizontal dropouts.
• Made in Japan: Crafted to Shimano's exacting tolerances at their Japanese manufacturing facilities.

Construction

The HB-7600-R body is precision-machined with a flawless high-flange finish. The solid chromoly steel axle resists bending forces during sprints, and the flanged axle nuts lock firmly into track dropouts. Cup-and-cone bearings with Borozon-treated races are field-adjustable, allowing the rider to dial in bearing preload and service them indefinitely — a key advantage over cartridge-bearing alternatives for high-use track environments.

Compatibility & Fit

Rear axle spacing: 120mm O.L.D. (standard track dropout). Axle diameter: 10mm. Spoke holes: 36H. Threading: flip-flop (double-sided) — 1.375" x 24 tpi English standard on both flanks, accepting standard track cogs and lockrings. Includes one Dura-Ace lockring. Compatible with 120mm-spaced track frames. Not compatible with freewheel gearing, cassette systems, or disc brake axle standards.