{"product_id":"fsa-ck-745-ebike-chainset-isis-25-7mm-spindle-black-crankset-for-bosch-more","title":"FSA CK-745 Ebike Chainset ISIS 25.7mm Spindle Black Crankset for Bosch \u0026 More","description":"\u003cp\u003eThe FSA Ebike Chainset CK-745 ISIS 25.7mm Black is engineered to deliver reliable performance and durability for your e-bike setup. Crafted from forged AL6061\/T6 aluminum, these crank arms combine strength with lightweight design, weighing just 477g per pair. Available in lengths of 165, 170, and 175mm, this chainset is tailored to fit a variety of rider preferences and bike geometries. Its sleek 2-tone anodized black finish not only looks great but also resists corrosion and wear over time.\u003c\/p\u003e\n\n\u003cp\u003eDesigned specifically for ISIS drive systems, the CK-745 ensures a secure and precise fit with a 25.7mm spindle diameter. This compatibility extends across popular e-bike motors such as Bosch G4, Brose MAG, Yamaha PW-X2, Fazua, Nidec, Polini, and SACHS, with carefully measured QFactor and clearance dimensions to match each motor's requirements. Whether you are upgrading or replacing your crankset, the FSA CK-745 offers a perfect blend of functionality and style for your e-bike’s transmission system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: QFactor refers to the distance between the outer edges of the crank arms, while clearance is the space between the inner sides. Always ensure the clearance is wider than your bike’s chainstays to avoid fitment issues.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding a durable and lightweight crank solution for e-bikes with ISIS drives.\u003c\/li\u003e\n  \u003cli\u003eOffering multiple crank arm lengths for customized fit and comfort.\u003c\/li\u003e\n  \u003cli\u003eCompatible with a wide range of popular e-bike motors, ensuring versatile application.\u003c\/li\u003e\n  \u003cli\u003eEnhancing the aesthetic with a sleek 2-tone anodized black finish.\u003c\/li\u003e\n  \u003cli\u003eEnsuring precise transmission performance with high-quality forged aluminum construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse with non-ISIS drive systems or incompatible spindle diameters.\u003c\/li\u003e\n  \u003cli\u003eApplications requiring crank arms outside the available lengths of 165, 170, or 175mm.\u003c\/li\u003e\n  \u003cli\u003eBikes with chainstay widths wider than the specified clearance measurements.\u003c\/li\u003e\n  \u003cli\u003eRiders seeking ultra-lightweight carbon cranksets instead of aluminum.\u003c\/li\u003e\n  \u003cli\u003eNon e-bike setups that do not require the reinforced durability for motor assistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this crankset compatible with my Bosch G4 motor?\u003c\/strong\u003e\u003cbr\u003eYes, the FSA CK-745 is designed to fit Bosch G4 motors with an ISIS drive interface, featuring a QFactor of 184mm and clearance of 156mm to ensure proper fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this chainset on a bike with a different motor brand?\u003c\/strong\u003e\u003cbr\u003eIt is compatible with several popular e-bike motors including Brose MAG, Yamaha PW-X2, Fazua, Nidec, Polini, and SACHS, as long as they use the ISIS drive system and the clearance fits your bike’s chainstays.\u003c\/p\u003e","brand":"FSA","offers":[{"title":"ISIS \/ Black \/ Offset - 25.7mm, Length - 170mm","offer_id":45966733738159,"sku":"324-0055003090","price":50.46,"currency_code":"GBP","in_stock":true},{"title":"ISIS \/ Black \/ Offset - 25.7mm, Length - 175mm","offer_id":45966733770927,"sku":"324-0055005090","price":50.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/CK-745-IS_20Bosch_20G4.jpg?v=1768531916","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/fsa-ck-745-ebike-chainset-isis-25-7mm-spindle-black-crankset-for-bosch-more","provider":"Swinnerton Cycles","version":"1.0","type":"link"}