{"title":"Square Taper Bottom Brackets","description":"\u003ch2\u003eBuying Square Taper Bottom Brackets Made Easy\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSquare taper bottom brackets are robust and don't cost much... However, they have been increasingly less installed on new bicycles in recent years. Why? Quite simply: These bottom brackets are quite heavy, which is a real turn-off when it comes to bicycle components today.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMoreover, manufacturers have put a lot of development work into lighter, modern bottom brackets. No matter how long they have proven themselves, the old components are then only offered as spare parts. Today, square taper brackets are only found on cheap, simple bicycles and children's bikes, or they are used as spare parts for retro bikes.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou can buy these bicycle parts as \"bottom brackets\" or \"inner brackets,\" with bottom bracket being just a slightly outdated term.\u003c\/li\u003e\n\u003cli\u003eSometimes they are also called \"cartridge brackets.\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/kategorie-vierkant-tretlager_480x480.png?v=1747304252\" alt=\"Square Taper Bottom Bracket\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003eHere you see the four edges that give the square taper bottom bracket its name. Image © Thun\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eHow a Square Taper Bottom Bracket Works\u003c\/h3\u003e\n\u003cp\u003eIn a square taper bottom bracket, the axle that connects the two crank arms is part of the bracket. It is held in a completely sealed sleeve (also called a \"cartridge,\" hence the name \"\u003cstrong\u003ecartridge bracket\u003c\/strong\u003e\") by two bearing shells.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003esquare end\u003c\/strong\u003e of the crankshaft fits into the also square hole of the crank and is screwed in there. The \u003cstrong\u003epedals\u003c\/strong\u003e are attached to the ends of the \u003cstrong\u003ecrank arms\u003c\/strong\u003e, and you're ready to go!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/kategorie-vierzahn-lager-passende-kurbel_480x480.png?v=1747304975\" alt=\"Crank for Square Taper Bottom Bracket\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eWhat Square Taper Bottom Brackets Are There?\u003c\/h2\u003e\n\u003cp\u003eIf you have the right system (i.e., you know you need a square taper bottom bracket), you still need to find the appropriate bracket.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eBuying the Right Inner Bracket Standard\u003c\/h3\u003e\n\u003cp\u003eThere are two particularly common standards for the sizes of square taper bottom brackets:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO\u003c\/strong\u003e is the European standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJIS\u003c\/strong\u003e is mainly used by Asian manufacturers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe two systems are not compatible\u003c\/strong\u003e! If you want to buy and install a square taper inner bracket, you should first find out which system your crank has, as the two standards are hard to distinguish with the naked eye.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSelecting the Right Dimensions for a Square Taper Bottom Bracket\u003c\/h3\u003e\n\u003cp\u003eWith square taper inner brackets, different \u003cstrong\u003ehousing standards\u003c\/strong\u003e are available, meaning they have \u003cstrong\u003edifferent diameters and threads\u003c\/strong\u003e. You can easily sort them here in the online shop using the filter at the top left. The housing standard determines whether a square axle fits into the bottom bracket shell and can be screwed in there. In almost all cases, square taper inner brackets are \u003cstrong\u003ethreaded brackets\u003c\/strong\u003e. BSA, ITA, or FRA are different thread types, differing in thread pitch (\u003cstrong\u003eTPI\u003c\/strong\u003e , Number of grooves per inch) and in the thread direction.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/kategorie-tretlager-vierkant-gewinde_480x480.png?v=1747306954\" alt=\"Square bottom bracket with thread and dimensions\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cem\u003eHere you can see on one hand the threads of the square bottom bracket and on the other hand the further details of the manufacturer. Image © Shimano\u003c\/em\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAdditionally, they come with different \u003cstrong\u003eaxle lengths\u003c\/strong\u003e from 102mm to 127mm, here too you can simply use our filters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe safest way to identify the right spare part is to take a look at your old bottom bracket, where the width, diameter, thread standard, and a hint whether you are currently using ISO or JIS are usually indicated.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eDo you want to buy a square bottom bracket?\u003c\/h3\u003e\n\u003cp\u003eIf you need a new bottom bracket, you are in the right place in the BMO online shop, because we have a large selection of bicycle parts for you. \u003cstrong\u003eBut do you even need a square bottom bracket?\u003c\/strong\u003e It's simple, if you remove the crank and then encounter square bolts, you have a square bracket. If there are more edges, it is a \u003ca href=\"\/en-fi\/collections\/innenlager-vielzahn\" title=\"Splined bottom bracket\"\u003e\u003cstrong\u003esplined bottom bracket\u003c\/strong\u003e\u003c\/a\u003e. If the crankshaft is firmly attached to one of the crank arms, you have a two-piece crank and a \u003ca href=\"\/en-fi\/collections\/innenlager-hohlachse\" title=\"Hollow axle bottom bracket\"\u003e\u003cstrong\u003ehollow axle\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eYou can easily filter by the different standards and sizes, so you can quickly find your new square bottom bracket. If you need more information, you can visit the \u003ca href=\"\/en-fi\/collections\/innenlager\" title=\"Bottom brackets\"\u003ebottom brackets\u003c\/a\u003e, where there is a particularly detailed \u003cstrong\u003ebuying guide\u003c\/strong\u003e.\u003c\/p\u003e ","products":[{"product_id":"miche-innenlager-pista-bsa-107mm","title":"Bottom bracket Pista BSA 107mm ","description":"\u003cp\u003eCartridge Bottom Bracket\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eColor: Black \/ Silver \u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminum 7075\u003c\/li\u003e\n\u003cli\u003eShell Width: 68 mm\u003c\/li\u003e\n\u003cli\u003eAxle Length: 107 mm\u003c\/li\u003e\n\u003cli\u003eAxle Interface: Square Taper JIS\u003c\/li\u003e\n\u003cli\u003eWeight: 210 g\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Miche","offers":[{"title":"Default Title","offer_id":50587518140680,"sku":"sw21346","price":32.6,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/Image.jpg?v=1736818530"},{"product_id":"thun-efficient-jive-thompson-einpresslager-oe40mm","title":"Efficient Jive Thompson press-fit bearing Ø40mm ","description":"\u003cp\u003eBottom bracket for old frames with a 40 mm bottom bracket diameter. Also suitable for old Mifa folding bikes.\u003c\/p\u003e\n\u003cp\u003eShaft made of specially hardened material (ML treatment) in standard ISO 4210-8:2014 EN14766 (MTB standard), double rubber-sealed industrial ball bearings, galvanized steel sleeve to protect the bottom bracket with a recess for internally routed cables.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eISO 4210-8:2014\u003c\/li\u003e\n\u003cli\u003euniversally usable for all square taper cranks (ISO 6695:2015)\u003c\/li\u003e\n\u003cli\u003edurable, maintenance-free, and highly weather and corrosion resistant\u003c\/li\u003e\n\u003cli\u003eOptimal rotation quality through double-sealed deep groove ball bearings\u003c\/li\u003e\n\u003cli\u003eThompson for pressing in\u003c\/li\u003e\n\u003cli\u003eDelivery includes 2 crank bolts (for Torx and 14 mm wrench)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation note\u003c\/strong\u003e: Bolt tightening torque: 45 Nm\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Thun","offers":[{"title":"119 mm","offer_id":50589190750472,"sku":"201406041455PF1","price":11.89,"currency_code":"EUR","in_stock":true},{"title":"127 mm","offer_id":50589190783240,"sku":"201406041455PF2","price":11.85,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/54-691.jpg?v=1736843931"},{"product_id":"miche-innenlager-pista-bsa-110-mm","title":"Bottom bracket Pista BSA 110 mm ","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eColor: Black \/ Silver \u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminum 7075\u003c\/li\u003e\n\u003cli\u003eHousing width: 68 mm\u003c\/li\u003e\n\u003cli\u003eAxle length: 110 mm\u003c\/li\u003e\n\u003cli\u003eAxle mount: Square JIS\u003c\/li\u003e\n\u003cli\u003eWeight: 210 g\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Miche","offers":[{"title":"Default Title","offer_id":50591907447048,"sku":"sw39920","price":26.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/ImageJ4ou1LOgiJcL3.jpg?v=1736870863"},{"product_id":"tange-seiki-innenlager-vierkant-jis-ita","title":"Inner bearing square JIS - ITA ","description":"\u003cp\u003eSimple and functional bottom bracket. Image similar.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eColor: Silver, Gray\u003c\/li\u003e\n\u003cli\u003eMaterials: Steel (axle), Aluminum (housing), Steel (left bearing cup), Steel (right bearing cup)\u003c\/li\u003e\n\u003cli\u003eHousing width: 70 mm (ITA)\u003c\/li\u003e\n\u003cli\u003eAxle lengths: 103 mm, 107 mm, 113 mm\u003c\/li\u003e\n\u003cli\u003eSquare taper\u003c\/li\u003e\n\u003cli\u003eSealed bearings\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Tange Seiki","offers":[{"title":"103 mm","offer_id":50594466431240,"sku":"201303141156PF01","price":19.6,"currency_code":"EUR","in_stock":true},{"title":"107 mm","offer_id":50594466365704,"sku":"201303141156PF02","price":19.9,"currency_code":"EUR","in_stock":false},{"title":"113 mm","offer_id":50594466398472,"sku":"201303141156PF03","price":19.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/0019101_tange-bottom-bracketxCFcSD2DF9As2.jpg?v=1736902797"},{"product_id":"tange-seiki-innenlager-vierkant-jis-bsa","title":"Bottom bracket square taper JIS - BSA ","description":"\u003cp\u003eSimple and functional bottom bracket\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWidth: 68 mm \u003c\/li\u003e\n\u003cli\u003eAxle lengths: 103 mm, 107 mm, 113 mm\u003c\/li\u003e\n\u003cli\u003e4 square JIS mount\u003c\/li\u003e\n\u003cli\u003esealed bearings\u003c\/li\u003e\n\u003cli\u003eCups compatible with standard Shimano bottom bracket tool\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Tange Seiki","offers":[{"title":"103 mm","offer_id":50594993176840,"sku":"201303141151PF01","price":22.9,"currency_code":"EUR","in_stock":true},{"title":"107 mm","offer_id":50594993111304,"sku":"201303141151PF02","price":19.6,"currency_code":"EUR","in_stock":false},{"title":"113 mm","offer_id":50594993144072,"sku":"201303141151PF03","price":21.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/0019101_tange-bottom-bracket.jpg?v=1736911829"},{"product_id":"shimano-bb-un300-vierkant-innenlager-bsa","title":"BB-UN300 Square Taper Bottom Bracket - BSA ","description":"\u003cp\u003eThe BB-UN300 from Shimano is the official successor to the Shimano BB-UN55 bottom bracket and now comes with the second bottom bracket cap made of steel instead of plastic, offering higher quality bearings.\u003c\/p\u003e\n\u003cp\u003eABEC 3 bearings are installed instead of the previously installed ABEC 1 bearings.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShell width: 68 mm\u003c\/li\u003e\n\u003cli\u003eAxle widths: 107 mm, 110 mm, 113 mm, 115 mm, 117 mm, 118 mm, 122.5 mm, 127 mm\u003c\/li\u003e\n\u003cli\u003eMaterials: Steel (axle)\u003c\/li\u003e\n\u003cli\u003eAxle mount: Square taper\u003c\/li\u003e\n\u003cli\u003eSuccessor to the Shimano BB-UN55 bottom bracket\u003c\/li\u003e\n\u003cli\u003eDifferent axle widths for cranks and chainlines\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Shimano","offers":[{"title":"107 mm","offer_id":50595118711048,"sku":"sw32869.3","price":14.61,"currency_code":"EUR","in_stock":true},{"title":"110 mm","offer_id":50595118743816,"sku":"sw32869.2","price":13.7,"currency_code":"EUR","in_stock":true},{"title":"113 mm","offer_id":50595118809352,"sku":"sw32869","price":14.6,"currency_code":"EUR","in_stock":true},{"title":"115 mm","offer_id":50595118907656,"sku":"sw32869.8","price":14.33,"currency_code":"EUR","in_stock":true},{"title":"117 mm","offer_id":50595118973192,"sku":"sw32869.5","price":14.61,"currency_code":"EUR","in_stock":true},{"title":"118 mm","offer_id":50595118874888,"sku":"sw32869.1","price":13.91,"currency_code":"EUR","in_stock":true},{"title":"122 mm","offer_id":50595118940424,"sku":"sw32869.6","price":13.76,"currency_code":"EUR","in_stock":true},{"title":"122.5 mm","offer_id":50595118776584,"sku":"sw32869.7","price":13.7,"currency_code":"EUR","in_stock":true},{"title":"127 mm","offer_id":50595118842120,"sku":"sw32869.4","price":14.25,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/EBBUN300B07X.jpg?v=1736913370"},{"product_id":"token-jis-vierkante-trapas-bsa-cromo-staal","title":"JIS Square Taper Bottom Bracket BSA - CroMo Steel ","description":"\u003cp\u003eCNC-machined, very high-quality JIS square taper bottom bracket with BSA thread.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThread: BSA 68 mm\u003c\/li\u003e\n\u003cli\u003eLengths: 103 mm, 107.5 mm, 110.5 mm, 113.5 mm, 116 mm, 118 mm\u003c\/li\u003e\n\u003cli\u003eMaterials: Carbon (body), CroMo steel (axle), Aluminum (cups)\u003c\/li\u003e\n\u003cli\u003eInterface: Square taper\u003c\/li\u003e\n\u003cli\u003eWeight: 212 g (103 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003every lightweight carbon body\u003c\/li\u003e\n\u003cli\u003ebearing cups made of aluminum\u003c\/li\u003e\n\u003cli\u003estandard square taper interface\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Token","offers":[{"title":"116 mm","offer_id":50597956124936,"sku":"sw21820","price":45.9,"currency_code":"EUR","in_stock":false},{"title":"118 mm","offer_id":50597956157704,"sku":"sw21820.1","price":46.49,"currency_code":"EUR","in_stock":false},{"title":"103 mm","offer_id":50597956190472,"sku":"sw21820.2","price":45.9,"currency_code":"EUR","in_stock":false},{"title":"110.5 mm","offer_id":50597956223240,"sku":"sw21820.4","price":46.09,"currency_code":"EUR","in_stock":false},{"title":"107.5 mm","offer_id":50597956256008,"sku":"sw21820.3","price":45.9,"currency_code":"EUR","in_stock":false},{"title":"113.5 mm","offer_id":50597956288776,"sku":"sw21820.5","price":37.02,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/jis-vierkant-innenlager-bsa-35553.jpg?v=1736942991"},{"product_id":"thun-efficient-jive-fs-innenlager-iso-4-kant","title":"Efficient Jive FS bottom bracket - ISO square taper ","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eISO 4210-8:2014 MTB certified and suitable for city\/trekking, mountain, and cargo bikes\u003c\/li\u003e\n\u003cli\u003eUniversally usable for all square taper cranks (ISO 6695:2015)\u003c\/li\u003e\n\u003cli\u003eDurable, maintenance-free, and highly weather and corrosion resistant\u003c\/li\u003e\n\u003cli\u003eOptimal rotation quality through double-sealed ball bearings\u003c\/li\u003e\n\u003cli\u003eLengths: 114 mm, 116 mm, 119 mm, 122.5 mm, 123 mm, 127 mm, 131 mm, 132 mm\u003c\/li\u003e\n\u003cli\u003eThread: BSA (1.37x24)\u003c\/li\u003e\n\u003cli\u003eIncludes screws (M8x1\/10.9, hex socket, FE\/ZN coated, lock, plastic washer)\u003c\/li\u003e\n\u003cli\u003eThe only bottom bracket \u003cstrong\u003eMADE IN GERMANY\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e ","brand":"Thun","offers":[{"title":"114 mm","offer_id":50612344750344,"sku":"SW43220","price":13.04,"currency_code":"EUR","in_stock":true},{"title":"116 mm","offer_id":50612344783112,"sku":"SW43220.1","price":13.99,"currency_code":"EUR","in_stock":true},{"title":"119 mm","offer_id":50612344815880,"sku":"SW43220.2","price":14.95,"currency_code":"EUR","in_stock":true},{"title":"122.5 mm","offer_id":50612344848648,"sku":"SW43220.3","price":14.44,"currency_code":"EUR","in_stock":true},{"title":"123 mm","offer_id":50612344881416,"sku":"SW43220.4","price":13.71,"currency_code":"EUR","in_stock":true},{"title":"127 mm","offer_id":50612344914184,"sku":"SW43220.5","price":12.89,"currency_code":"EUR","in_stock":true},{"title":"131 mm","offer_id":50612344946952,"sku":"SW43220.6","price":13.2,"currency_code":"EUR","in_stock":true},{"title":"132 mm","offer_id":50612344979720,"sku":"SW43220.7","price":14.68,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/7085\/1592\/files\/Nicht-benannt9R3b4oChYnGsC.jpg?v=1737051783"}],"url":"https:\/\/www.bike-mailorder.com\/en-fi\/collections\/bottom-bracket-square-taper.oembed","provider":"Bike-Mailorder","version":"1.0","type":"link"}