{"product_id":"ethirteen-helix-race-107-bcd-chainring-chainrings-cnrg2029","title":"e*thirteen Helix R 107 BCD 42t Chainring - 11 - 12-Speed Aluminum Alloy, CNC Machined for Gravel \u0026 Road Cycling, Premium Stiffness \u0026 Chain Retention","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your Gravel and Road cycling performance with the ethirteen Helix R 107 BCD Chainring - 42t, 11\/12-Speed, Black. Designed for high-demand riders, this premium chainring combines advanced materials, precision engineering, and innovative features to deliver superior durability, stiffness, and efficiency on every ride.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Construction:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eCrafted from durable, aerospace-grade 7075-T6 aluminum (7075-T7), the ethirteen Helix R chainring offers exceptional strength-to-weight ratio and long-lasting wear. CNC-machined from a solid block of premium alloy, this chainring ensures unmatched stiffness and a sleek, technical aesthetic that complements any high-performance cycling setup.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003ePerformance \u0026amp; Engineering:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eEngineered for racing excellence, the Helix R features an M4 narrow-wide tooth profile that guarantees optimal chain retention and compatibility with Shimano and SRAM 11\/12-speed chains, including flattop styles. The 4.8mm chainline offset, set precisely by the SRAM crank assembly, ensures smooth power transfer and compatibility across a wide range of drivetrains.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eComponents \u0026amp; Technology:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eCompatible with 4-bolt 107 BCD SRAM and Quarq power meter cranks, the 42-tooth ring provides a perfect gear ratio for conquering steep climbs or maintaining high speeds on flat terrain. The CNC-optimized design minimizes weight (only 81g) while maximizing stiffness, stiffness-to-weight ratio, and technical aesthetics.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003eDesigned in a sleek black finish, the Helix R chainring is ideal for gravel riders, road racers, and cyclists seeking a high-performance upgrade. Its round shape and strategic tooth configuration reduce wear and improve chain engagement, ensuring reliable shifting and superior chain retention during demanding rides.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative \u0026amp; Differentiating Features:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Compatible with both Shimano and SRAM 11\/12-speed drivetrains, including flattop chain compatibility\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Premium CNC-machined from lightweight, high-strength 7075 alloy for maximum durability\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Narrow-wide tooth profile delivers excellent chain retention and reduces chain wear\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Designed for versatility with normal (45mm) and wide (47.5mm) chainline configurations\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Perfectly pairs with ethirteen's cassettes for extended gear range and top-end speed\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eOptimize your cycling setup with the ethirteen Helix R 107 BCD Chainring, engineered for durability, efficiency, and style. Whether you're pushing performance on gravel trails or racing on the road, this innovative chainring ensures a reliable and precise drivetrain.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eEnhanced durability with the e*thirteen Helix R 107 BCD Chainring crafted from premium 7075-T6 aluminum alloy for superior strength, stiffness, and long-lasting performance. \u003c\/li\u003e\n\u003cli\u003eOptimized for high-performance Gravel and Road cycling, this 42-tooth, round chainring features CNC-machined construction that delivers precise engineering, lightweight design, and sleek minimal aesthetics. \u003c\/li\u003e\n\u003cli\u003eDesigned for compatibility with SRAM Red, Force, and Quarq power meter cranks, the 4-bolt 107 BCD mounting ensures a secure fit and seamless integration with 11 and 12-speed drivetrains, enhancing gear shifting efficiency. \u003c\/li\u003e\n\u003cli\u003eThe M4 narrow-wide tooth profile provides excellent chain retention across varied terrains, compatible with Shimano and SRAM flattop chains, reducing chain drop and wear for reliable ride quality. \u003c\/li\u003e\n\u003cli\u003eDesigned for versatile use cases, this chainring offers a 4.8mm offset with a 45mm to 47.5mm chainline depending on crank width, making it an ideal upgrade for aggressive riding, endurance adventures, or competitive cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"e*thirteen","offers":[{"title":"Default Title","offer_id":42201910476867,"sku":"CNRG2029","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/CR4211_a4495705-67e3-4ba2-9ab0-71cdf8813659.jpg?v=1773592209","url":"https:\/\/365cycles.com\/products\/ethirteen-helix-race-107-bcd-chainring-chainrings-cnrg2029","provider":"365 Cycles","version":"1.0","type":"link"}