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Surly Single Speed Track Cog Lockring 1.29" X 24mm

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CNC-machined from premium stainless steel...no flaking chrome or rusting. The improved design is the thread contact, It’s now a full 5mm thick, plus a lip (.65mm extra) to maximize thread contact on all compatible hubs. Fits English lockring threads (1.29x24tpi LH) to work on almost all track hubs available today except Campagnolo (1.32x24t LH) and French (33x1mm LH).
• Machined from Stainless Steel • 1.29x24tpi Left Hand • 5mm Thick (plus lip .65mm extra) • Not Compatible with Campagnolo (1.32x24t LH) and French (33x1mm LH).20t