The Surly Track Cog Lockring is engineered to pair perfectly with the Surly Track Cog — like hamburgers and hot dogs, they’re made for each other. Built tough and precisely machined, this lockring ensures a secure, reliable hold for your fixed-gear or track setup.

Features

• Optimized Design: Developed specifically for Surly Track Cogs for a perfect fit and maximum security

• Thick & Durable: 5mm thick body plus an extra 0.65mm lip for enhanced thread engagement and strength

• Threading: Fits English lockring threads (1.29” x 24 TPI, left-hand) — compatible with most track hubs

• Wide Compatibility: Works with nearly all standard ISO-threaded hubs (1.375” x 24 TPI)

• Exclusions: Not compatible with Campagnolo (1.32” x 24 TPI LH) or French (33mm x 1mm LH) hubs