{"product_id":"promax-ex-1-bottom-bracket-68mm-hollowtech-ii-bottom-bracket-cr3550-bicycle-bottom-brackets","title":"Promax EX-1 External Sealed Bearing BSA Bottom Bracket for 24mm Cranks | Alloy CNC Machined, Dual-Labyrinth Seals, Compatible with 68 - 73mm Shells","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your bicycle's performance and reliability with the Promax EX-1 External Sealed Bearings BSA Bottom Bracket, crafted for 24mm cranks and compatible with 68mm or 73mm shell widths. Designed for cyclists seeking precision, durability, and seamless integration, this high-quality bottom bracket features advanced engineering and premium materials that elevate your 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\u003eBuilt with cold-forged and CNC-machined alloy cups, the Promax EX-1 boasts enhanced strength, lightweight performance, and corrosion resistance. Its precision sealed bearings are engineered for maximum longevity and smooth pedaling efficiency, even under demanding riding conditions. Dual-labyrinth bearing covers provide superior dust and water protection, ensuring consistent performance over time.\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\u003eThe EX-1 utilizes sealed bearing technology, reducing friction and increasing efficiency for improved power transfer. The bearings are designed to withstand the rigors of mountain biking, road cycling, and gravel adventures. Its robust construction guarantees reduced maintenance and extended lifespan, while maintaining a lightweight profile at just 102.9 grams.\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 a variety of spindle interfaces including Shimano Hollowtech II, FSA MegaExo, FSA MegaExo Light, and RaceFace EXI, the EX-1 offers versatile compatibility across numerous cranksets. The BSA (English) shell interface ensures easy installation and secure fitment in frames with 68mm or 73mm shell widths and 1.37\" I.D. bottom bracket shells.\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\u003eFeaturing a sleek black finish, the Promax EX-1 seamlessly blends with any bike aesthetic-from sleek road bikes to rugged mountain setups. Perfect for upgrading your existing bottom bracket or building a custom setup, this bottom bracket enhances pedaling stability, boosts overall bike efficiency, and promotes a smooth, silent ride.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative Features \u0026amp; Benefits:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Cold-forged, CNC-machined alloy cups for durability and precision\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Dual-labyrinth sealed bearings for superior dirt and water protection\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Compatible with multiple spindle interfaces, including Shimano and RaceFace\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Suitable for 68mm and 73mm shell widths, fitting a wide range of bikes\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Optimized for maximum power transfer and long-lasting performance\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eElevate your cycling experience with the Promax EX-1 External BSA Bottom Bracket-designed for riders who demand performance, reliability, and style. Perfect for upgrading your bike's drivetrain or undergoing a complete build, this bottom bracket ensures a smooth, efficient, and trouble-free ride every time.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eDurable cold-forged and CNC-machined alloy cups provide superior strength, longevity, and resistance to corrosion for reliable performance on demanding rides \u003c\/li\u003e\n\u003cli\u003ePrecision sealed bearings with dual-labyrinth covers ensure smooth rotation, minimal maintenance, and protection against dirt and moisture for maximum efficiency \u003c\/li\u003e\n\u003cli\u003eCompatible with all 24mm crank spindles and designed for 68 and 73mm BSA shell widths, making it an versatile upgrade for a wide range of road and mountain bikes \u003c\/li\u003e\n\u003cli\u003eEngineered with multi-interface spindle compatibility, including Shimano Hollowtech II, FSA MegaExo, and RaceFace EXI, offering versatile integration with popular cranksets \u003c\/li\u003e\n\u003cli\u003eSleek black finish and innovative sealed bearing technology deliver a professional look and enhanced durability, making this bottom bracket ideal for high-performance cycling and everyday riding\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Promax","offers":[{"title":"Default Title","offer_id":42206290149443,"sku":"CR3550","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/CR3550.jpg?v=1773362191","url":"https:\/\/365cycles.com\/products\/promax-ex-1-bottom-bracket-68mm-hollowtech-ii-bottom-bracket-cr3550-bicycle-bottom-brackets","provider":"365 Cycles","version":"1.0","type":"link"}