{"product_id":"surly-track-cog-1-8-x-18t-silver","title":"Surly Track Cog 1\/8'' X 18t Silver","description":"\u003cdiv\u003e\n\u003ch2\u003eSurly Track Cog 18T 1\/8in Silver New 415 Chromoly Steel\u003c\/h2\u003e\n\u003cbr\u003e\n\u003cp\u003eEngineered for track cycling, this 18-tooth cog pairs with 1\/8\" chains to deliver reliable, repeatable engagement during sprints and tempo laps. The gear is ideal for fixed-gear and track builds that demand crisp power transfer.\u003c\/p\u003e \u003ch3\u003eSpecifications and materials\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cp\u003eMaterial: 415 hardened chromoly steel with a durable silver finish. Size: 1\/8\" (0.125\") chain. Teeth: 18. Threading: 1.375\" x 24 tpi, right-hand. Fits track hubs; BMX\/freewheel hubs exist in the same threading but are not recommended for this application.\u003c\/p\u003e \u003ch3\u003ePerformance and use cases\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cp\u003eBest used on track hubs where precise, long-wearing engagement matters—ideal for velodrome laps, time trials, and single-speed street rides that demand consistent performance and longevity.\u003c\/p\u003e \u003ch3\u003eInstallation and care\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cp\u003eThread onto a compatible track cog lockring. Keep threads clean, apply a light grease, and avoid cross-threading to preserve life and ensure smooth retention during high-torque efforts.\u003c\/p\u003e \u003ch3\u003eWhy choose this cog\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cp\u003eSurly’s 415 chromoly steel offers sturdy wear resistance and durability under high-torque riding. The standard BMX-style threading keeps retrofits straightforward while maintaining true tracking and alignment on track hubs.\u003c\/p\u003e \u003cbr\u003e \u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTooth Count\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1\/8''\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Surly","offers":[{"title":"Default Title","offer_id":49012478673136,"sku":"FW2066","price":35.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0640\/8142\/8720\/files\/surly-first-variant-sku-track-cogs-lockrings-7456977.jpg?v=1778856971","url":"https:\/\/stage21bikes.com\/products\/surly-track-cog-1-8-x-18t-silver","provider":"Stage 21 Bikes","version":"1.0","type":"link"}