{"title":"Shimano Bottom Brackets","description":"\u003cp\u003eA Shimano bottom bracket holds the bearings your crankset turns on, and it must match two things: the shell in your frame and the spindle on your crankset. Threaded and press-fit frames take different bottom brackets, and older square taper and Octalink cranks need their own cartridge types.\u003c\/p\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eRead more: threaded or press-fit, Hollowtech II, square taper and Octalink, fitting\u003c\/summary\u003e\n\n\u003ch2\u003eThreaded or press-fit\u003c\/h2\u003e\n\u003cp\u003eThreaded frames take cups that screw into the shell, usually the BSA standard at 68 mm wide on road bikes and 73 mm on many mountain bikes. Press-fit frames take bearings pressed straight into a smooth shell, such as BB86 on road bikes and BB92 on mountain bikes. Check your frame's shell type before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eHollowtech II\u003c\/h2\u003e\n\u003cp\u003eMost current Shimano cranksets use Hollowtech II, with a 24 mm steel spindle fixed to the drive side arm. Hollowtech II bottom brackets come in threaded and press-fit versions that take the same spindle, so the frame shell decides which one you need.\u003c\/p\u003e\n\n\u003ch2\u003eSquare taper and Octalink\u003c\/h2\u003e\n\u003cp\u003eMany entry and older bikes use a cartridge bottom bracket with its own spindle: square taper on budget cranks and splined Octalink on some older Shimano cranks. Match the spindle length and shell width so the chainline and crank position stay correct.\u003c\/p\u003e\n\n\u003ch2\u003eFitting and creaks\u003c\/h2\u003e\n\u003cp\u003eThreaded bottom brackets need a matching cup tool and the correct torque, while press-fit types need a bearing press and a clean shell. Creaking often comes from dirt or dry threads rather than worn bearings, so cleaning and greasing may solve it.\u003c\/p\u003e\n\n\u003cp\u003eNot sure which bottom bracket fits your frame? \u003ca href=\"?tba-chat=Which+Shimano+bottom+bracket+fits+my+bike%3F\"\u003eAsk TBA Guide\u003c\/a\u003e, our chat assistant.\u003c\/p\u003e\n\n\u003c\/details\u003e","products":[{"product_id":"shimano-tiagra-bottom-bracket-bb-rs500","title":"Shimano Tiagra Bottom Bracket BB-RS500","description":"\u003ch3 class=\"cmp-product-info__modelno\" data-mce-fragment=\"1\"\u003eShimano Tiagra Bottom Bracket BB-RS500\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eShimano Tiagra - Bottom Bracket - Threaded - Hollowtech II - 68\/70 mm shell width\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUncompromised Performance:\u003c\/strong\u003e Crafted with Shimano's renowned engineering, the Tiagra Bottom Bracket BB-RS500 guarantees unrivaled performance. Its innovative Hollowtech II technology enhances stiffness and reduces weight, translating into more efficient power transfer with each pedal stroke.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect Fit \u0026amp; Compatibility:\u003c\/strong\u003e Designed for threaded bottom bracket shells with 68\/70 mm width, this bottom bracket effortlessly fits a wide range of frames. Say goodbye to compatibility worries and embrace a seamless integration into your existing setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt to Last:\u003c\/strong\u003e The Shimano Tiagra Bottom Bracket BB-RS500 comes equipped with a new seal construction that ensures exceptional longevity. Enjoy long-lasting performance on your rides, with minimal maintenance required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSmooth \u0026amp; Silent Riding:\u003c\/strong\u003e Benefit from the bottom bracket's precision-engineered bearings, which deliver a smooth and silent cycling experience. Focus solely on your ride, as the BB-RS500 efficiently reduces friction for an uninterrupted journey.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrust in Shimano's Legacy:\u003c\/strong\u003e As a global leader in cycling components, Shimano is a name synonymous with reliability and innovation. With the Tiagra Bottom Bracket BB-RS500, you can trust in Shimano's legacy and elevate your cycling adventures with confidence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy Installation \u0026amp; Maintenance:\u003c\/strong\u003e With its user-friendly design, installation and maintenance are a breeze. The threaded bottom bracket system ensures straightforward setup, and the new seal construction simplifies maintenance, leaving you more time to enjoy the open road.\u003c\/p\u003e\n\u003ch5 class=\"cmp-product-info__title\"\u003eSpecifications\u003c\/h5\u003e\n\u003ch3\u003eSpecifications of Shimano Bottom Bracket BB-RS500\u003c\/h3\u003e\n\u003ctable style=\"width: 560px;\" class=\"cmp-product-spec__table\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 17px;\" class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 401.1875px; height: 17px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eModel No\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"width: 144.8125px; height: 17px;\" class=\"cmp-product-spec__value\"\u003eBB-RS500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 36px;\" class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 401.1875px; height: 36px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eSeries\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 144.8125px; height: 36px;\" class=\"cmp-product-spec__value\"\u003eTiagra 4700 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 17px;\" class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 401.1875px; height: 17px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eAverage weight\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 144.8125px; height: 17px;\" class=\"cmp-product-spec__value\"\u003e92\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 17px;\" class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 401.1875px; height: 17px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eHollowTech II Bottom Bracket|Threaded Bottom Bracket Type\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 144.8125px; height: 17px;\" class=\"cmp-product-spec__value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable height=\"50\" style=\"width: 559px;\" class=\"cmp-product-spec__table\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 9px;\" class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; height: 9px; width: 401.09375px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eThreaded Bottom Bracket Shell Width (mm)_68\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; height: 9px; width: 143.90625px;\" class=\"cmp-product-spec__value\"\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 17px;\" class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; height: 17px; width: 401.09375px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eThreaded Bottom Bracket Shell Width (mm)_70\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; height: 17px; width: 143.90625px;\" class=\"cmp-product-spec__value\"\u003e\u003cspan\u003eYes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003eTechnology\u003c\/h5\u003e\n\u003ch3\u003eTechnology of Shimano Bottom Bracket BB-RS500\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eHollowTech II:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eProviding the best balance of stiffness, strength, weight and rotating performance\u003c\/p\u003e\n\u003cp\u003eThe concept of Hollowtech II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own proprietary forging technology that also maintains rigidity.\u003c\/p\u003e\n\u003cp\u003eThe addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.\u003c\/p\u003e\n\u003cp\u003eThe Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness \u0026amp; rotating performance in a lightweight and beautiful crankset design.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Precision Sealing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMoreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":42348650594465,"sku":"EBBRS500B","price":1270.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/5869\/2257\/files\/shimano-tiagra-bottom-bracket-bb-rs500-the-bike-affair-273878.jpg?v=1713323067"},{"product_id":"shimano-bb-un300-square-type-bottom-bracket","title":"Shimano BB-UN300 Square Type Bottom Bracket","description":"\u003cp\u003eThe Shimano BB-UN300 is a square taper bottom bracket built to deliver long-lasting performance and dependable support for your drivetrain. Designed with Shimano’s renowned durability, it’s ideal for recreational and everyday riding.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSmooth, Stable Operation\u003c\/b\u003e: Featuring cartridge bearings, the BB-UN300 offers smoother rotation and reduced friction over extended use. Its internal construction ensures a sealed, maintenance-free experience that stands up to weather and debris.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eImproved Chainline Stability\u003c\/b\u003e: The integrated chain line stabilizer helps maintain precise alignment, contributing to better drivetrain performance and gear shifting. This feature is especially valuable in keeping your ride efficient and responsive.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMultiple Structure Options\u003c\/b\u003e: Whether you ride with a standard setup, E-type front derailleur, or chain case, the BB-UN300 supports all three configurations. This makes it a flexible upgrade or replacement for a wide range of bicycles.\u003c\/p\u003e\n\u003cp\u003e\u003ci\u003eWith an aluminum adapter and steel axle, the Shimano BB-UN300 balances strength and weight. It’s a cost-effective solution for riders seeking Shimano reliability without compromising on quality.\u003c\/i\u003e\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"68x107 mm","offer_id":44545341587617,"sku":"EBBUN300B07X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"68x110 mm","offer_id":43133543415969,"sku":"EBBUN300B10X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"68x113 mm","offer_id":43920145318049,"sku":"EBBUN300B13X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"68x115mm(D-H)","offer_id":44735148949665,"sku":"EBBUN300B15B","price":1150.0,"currency_code":"INR","in_stock":true},{"title":"68x117.5 mm","offer_id":45093672321185,"sku":"EBBUN300B17X","price":1110.0,"currency_code":"INR","in_stock":false},{"title":"68x118mm(XL118)","offer_id":44735150456993,"sku":"EBBUN300B18X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"68x122.5 mm(D-NL)","offer_id":42753442480289,"sku":"EBBUN300B22X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"68x122.5 mm (LL123)","offer_id":42753442513057,"sku":"EBBUN300B23X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"73x118 mm","offer_id":44965513003169,"sku":"EBBUN300C18X","price":1110.0,"currency_code":"INR","in_stock":true},{"title":"73x122.5 mm","offer_id":44072487944353,"sku":"EBBUN300C23X","price":1110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/5869\/2257\/files\/shimano-tourney-bb-un300-square-type-bottom-bracket-the-bike-affair-753503.jpg?v=1732620926"},{"product_id":"shimano-ultegra-sm-bbr60-threaded-hollowtech-ii-bottom-bracket","title":"Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket","description":"\u003cp\u003eUpgrade your bike's bottom bracket with the Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket. Built with precision and durability in mind, this bottom bracket is designed for threaded shell widths of 68\/70 mm and ensures a smooth and reliable ride.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThreaded Hollowtech II Design for Easy Installation: \u003c\/b\u003eFeaturing a threaded Hollowtech II design, the SM-BBR60 bottom bracket is easy to install and provides a secure and stable fit to your bike frame. Enjoy hassle-free setup and worry-free riding with this threaded bottom bracket.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eReliable Shimano Bearings and Seals: \u003c\/b\u003eThe Shimano Ultegra bottom bracket is equipped with reliable bearings and seals, providing long-lasting performance and smooth rotation. The high-quality components contribute to its durability and ensure a consistently smooth ride.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLong Service Life for Enduring Performance: \u003c\/b\u003eWith its robust construction and dependable components, the SM-BBR60 bottom bracket offers a long service life, reducing the need for frequent replacements. Enjoy enduring performance and extended use from this top-quality bottom bracket.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCompatible with Ultegra and Other Compatible Cranksets: \u003c\/b\u003eDesigned for use with Ultegra cranksets, the SM-BBR60 bottom bracket is also compatible with other compatible cranksets that utilize the Hollowtech II system.\u003c\/p\u003e\n\u003cp\u003e\u003ci\u003eEnjoy versatility and flexibility when it comes to upgrading your bike's drivetrain.\u003c\/i\u003e\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":42753454997665,"sku":"ISMBBR60B","price":1810.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0558\/5869\/2257\/files\/shimano-ultegra-sm-bbr60-threaded-hollowtech-ii-bottom-bracket-the-bike-affair-678996.jpg?v=1713323131"},{"product_id":"shimano-deore-xt-bb-mt800-hollowtech-ii-threaded-bottom-bracket","title":"Shimano Deore XT BB-MT800 Hollowtech II Threaded Bottom Bracket","description":"\u003cdiv class=\"groupset-head-area hide-sm\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"cmp-product-info__modelno-area\" data-mce-fragment=\"1\"\u003e\n\u003ch3\u003e\u003cstrong\u003eExperience Exceptional Performance with the Shimano Deore XT BB-MT800 Hollowtech II Threaded Bottom Bracket\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eShimano Deore XT - Bottom Bracket - Threaded - Hollowtech II - 68\/73 mm shell width\u003c\/p\u003e\n\u003cp\u003eUpgrade your mountain biking adventures with the Shimano Deore XT BB-MT800 Hollowtech II Threaded Bottom Bracket. Specifically designed for Shimano 24mm MTB cranks, this bottom bracket guarantees high-quality performance with its sealed bearings and offers versatility with both threaded and pressfit options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSealed Bearings for Optimal Performance: \u003c\/strong\u003eThe Shimano Deore XT BB-MT800 is equipped with high-quality sealed bearings, ensuring smooth and reliable rotation. These sealed bearings not only provide enhanced durability but also reduce friction, allowing you to maximize power transfer and pedal efficiency during every ride.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHollowtech II Design for Lightweight Strength: \u003c\/strong\u003eEmbrace the Hollowtech II design, which combines lightweight construction with exceptional strength. The Deore XT bottom bracket's Hollowtech II technology ensures a sturdy foundation for your crankset, contributing to an overall lighter weight for your MTB setup without compromising on performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVersatility with Threaded and Pressfit Options: \u003c\/strong\u003eThe Deore XT BB-MT800 offers versatility to suit your specific MTB frame requirements. Whether you need a threaded or pressfit option, Shimano has you covered, providing seamless compatibility for various mountain bike frames.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for 68\/73mm Shell Width: \u003c\/strong\u003eWith a design catered to fit bottom bracket shell widths of 68mm and 73mm, the Shimano Deore XT BB-MT800 is suitable for a wide range of MTB frames. Its precise fit ensures a secure and stable connection, giving you the confidence to tackle any challenging terrain.\u003c\/p\u003e\n\u003ch5 class=\"cmp-product-info__modelno\" data-mce-fragment=\"1\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h5\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications of Shimano Deore XT BB-MT800 Hollowtech II Threaded Bottom Bracket\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cdiv class=\"cmp-itemlist-accordion__always-visible-section\"\u003e\n\u003ctable class=\"cmp-product-spec__table\" style=\"width: 539px;\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 270px;\" class=\"cmp-product-spec__name\"\u003e\n\u003cspan style=\"font-weight: normal;\"\u003eModel No\u003c\/span\u003e\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 253px;\" class=\"cmp-product-spec__value\"\u003eBB-MT800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 270px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eSeries\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 253px;\" class=\"cmp-product-spec__value\"\u003eDeore XT T8000 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 270px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eAverage weight\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 253px;\" class=\"cmp-product-spec__value\"\u003e82\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 270px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eHollowtech II Bottom Bracket_Threaded Bottom Bracket Type\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 253px;\" class=\"cmp-product-spec__value\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"cmp-product-spec__table-row\"\u003e\n\u003cth style=\"text-align: left; width: 270px;\" class=\"cmp-product-spec__name\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eThreaded Bottom Bracket Shell Width (mm)\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd style=\"text-align: left; width: 253px;\" class=\"cmp-product-spec__value\"\u003e68, 73\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cmp-itemlist-accordion__accordion-section cmp-itemlist-accordion__accordion-section--is-opened\"\u003e\n\u003ch5 class=\"cmp-itemlist-accordion__contents\" data-starting-height=\"0\" data-final-height=\"112\"\u003eTechnologies\u003cbr\u003e\n\u003c\/h5\u003e\n\u003ch3\u003eTechnologies of Shimano Deore XT BB-MT800 Hollowtech II Threaded Bottom Bracket\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eHollowtech II:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eProviding the best balance of stiffness, strength, weight and rotating performance\u003cbr\u003eThe concept of Hollowtech II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own proprietary forging technology that also maintains rigidity. The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness \u0026amp; rotating performance in a lightweight and beautiful crankset design.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Precision Sealing: \u003c\/strong\u003e\u003cspan\u003eMoreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.\u003cmeta charset=\"UTF-8\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e24mm Diameter Axle And Bearings: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eWhy choose the 24mm axle and bearings for the Hollowtech II crankset? \u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe diameter of the Bottom Bracket axle and bearings was of primary importance for the development because the Bottom Bracket axle area is tied to such key elements as stiffness, strength, weight and rotating performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eWhat’s important is the total balance of crankset\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn addition, taking the crankset as a whole, the total balance of crankarm rigidity, axle stiffness, bearing position and others is essential.\u003c\/p\u003e\n\u003cp\u003eIndeed, the crankset is designed by careful consideration of the total balance of those elements to prevent breakage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutboard Bearing: \u003c\/strong\u003eFor most frames with 68mm Bottom Bracket shells, Hollowtech II with 24mm axle can set the bearing position outside of the frame to provide better weight distribution and more stability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e24mm Diameter Axle And Bearings Provide Optimum Balance For The Crankset: \u003c\/strong\u003eAfter studying all these problems thoroughly, we made the decision to adopt the 24mm diameter axle and bearings, which have the optimum balance, for the Hollowtech II crankset.\u003c\/p\u003e\n\u003cp\u003eIn addition, an examination of the total crankset, including the crankarm and gears, proves the optimum balance of rigidity, weight and rotating performance for the ultimate transfer of power to your bike. 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With proper tools and techniques, the installation becomes straightforward, allowing you to spend more time on the road.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCompatible with Hollowtech II Cranksets: \u003c\/b\u003eDesigned for Hollowtech II cranksets, the Ultegra bottom bracket ensures seamless compatibility and optimal performance. 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It is meticulously crafted to deliver flawless function and durability, empowering you to push your cycling limits with confidence.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLightweight at 54 Grams: \u003c\/b\u003eDespite its outstanding performance, the Dura Ace SM-BB92-41B remains remarkably lightweight, weighing in at a mere 54 grams. This lightweight design adds to your bike's agility and responsiveness, allowing you to soar through any terrain with ease.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePerfect Fit for Press Fit Frames with Hollowtech II Technology: \u003c\/b\u003eDesigned for Press Fit frames with Hollowtech II technology, the SM-BB92-41B bottom bracket ensures a secure and accurate fitment. 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