{"product_id":"overfast-colnago-y1rs-carbon-fibre-ultralight-di2-battery-holder-shimano","title":"Overfast COLNAGO Y1RS Carbon Fibre Ultralight Battery Holder - SHIMANO Di2","description":"\u003ch1\u003eOverfast Ultralight Di2 Battery Holder for Colnago Y1RS\u003c\/h1\u003e\n\u003ch2\u003eHidden Performance. Engineered for the Details.\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e2026 Overfast Ultralight Di2 Battery Holder\u003c\/strong\u003e has been developed exclusively for the \u003cstrong\u003eColnago Y1RS\u003c\/strong\u003e, replacing the original battery mounting system with an ultra-lightweight assembly engineered for riders who believe every gram—and every detail—matters.\u003c\/p\u003e\n\u003cp\u003eWeighing just \u003cstrong\u003e10g (±1g)\u003c\/strong\u003e, the Overfast battery holder delivers an incredible \u003cstrong\u003e97g weight saving\u003c\/strong\u003e compared to the original \u003cstrong\u003e107g Colnago\u003c\/strong\u003e assembly. Combining a \u003cstrong\u003efull carbon fibre battery cover\u003c\/strong\u003e with a \u003cstrong\u003e3D-printed carbon composite body\u003c\/strong\u003e, it provides a secure, rattle-free solution without compromising strength or reliability.\u003c\/p\u003e\n\u003cp\u003eComplete with a premium \u003cstrong\u003eblack titanium mounting bolt\u003c\/strong\u003e, laser etched with the \u003cstrong\u003eOVERFAST\u003c\/strong\u003e logo, it's the perfect finishing touch for the ultimate Y1RS build.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNew for 2026\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned exclusively for the Colnago Y1RS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeighs just \u003cstrong\u003e10g (±1g)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSaves approximately \u003cstrong\u003e97g\u003c\/strong\u003e over the original Colnago battery holder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFull carbon fibre battery cover\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdvanced 3D-printed carbon composite body\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBlack titanium mounting bolt with laser-etched OVERFAST logo\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUltra-lightweight construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSecure, rattle-free battery retention\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDirect replacement for the original battery holder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvailable in \u003cstrong\u003eForged Carbon\u003c\/strong\u003e or \u003cstrong\u003e3K Carbon\u003c\/strong\u003e finishes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAdvanced Carbon Construction\u003c\/h2\u003e\n\u003cp\u003eThe 2026 version introduces an all-new construction, pairing a lightweight \u003cstrong\u003e3D-printed carbon composite body\u003c\/strong\u003e with a premium \u003cstrong\u003efull carbon fibre cover\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eEvery element has been engineered to remove unnecessary weight while maintaining exceptional rigidity and long-term durability. The result is a beautifully finished component that complements one of the world's most advanced road bikes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eLightweight Without Compromise\u003c\/h2\u003e\n\u003cp\u003eRemoving almost 100 grams from a hidden component is only worthwhile if reliability remains uncompromised.\u003c\/p\u003e\n\u003cp\u003eThe Overfast battery holder has been engineered with generous strength reserves and extensively durability tested, including \u003cstrong\u003emore than 2,000 drop tests from 1 metre\u003c\/strong\u003e with a Di2 battery installed. Its rigid carbon composite construction also resists bending under substantial load, ensuring secure battery retention in real-world riding.\u003c\/p\u003e\n\u003cp\u003eIt's designed to be exceptionally light—but built with complete confidence.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSecure Fit. Zero Rattle.\u003c\/h2\u003e\n\u003cp\u003eThe Overfast battery holder has been designed specifically around the Colnago Y1RS to provide a precise, secure fit within the downtube.\u003c\/p\u003e\n\u003cp\u003eOnce installed, the Di2 battery is held firmly in place, eliminating unwanted movement and preventing rattles, while maintaining easy access for servicing when required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSimple Installation\u003c\/h2\u003e\n\u003cp\u003eInstallation couldn't be easier.\u003c\/p\u003e\n\u003cp\u003eSimply position the supplied titanium mounting bolt to the indicated reference mark, tighten into place and the battery holder is ready to ride. No specialist modifications or complicated setup are required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCompatibility: Colnago Y1RS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDrivetrain: Shimano Di2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeight: \u003cstrong\u003e10g (±1g)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOriginal Colnago Assembly: \u003cstrong\u003e107g\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeight Saving: Approximately +\u003cstrong\u003e80\u003c\/strong\u003e\u003cstrong\u003eg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBody Material: 3D-Printed Carbon Composite\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCover Material: Full Carbon Fibre\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting Bolt: Black Titanium with laser-etched OVERFAST logo\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFinish Options:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eForged Carbon\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e3K Carbon\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy We Stock It\u003c\/h2\u003e\n\u003cp\u003eThis is exactly the kind of product that defines Overfast. Instead of accepting the original design, they completely re-engineered one of the heaviest hidden components on the Colnago Y1RS, reducing its weight by over \u003cstrong\u003e80+\u003c\/strong\u003e\u003cstrong\u003e grams\u003c\/strong\u003e while improving fit, eliminating rattles and maintaining exceptional strength.\u003c\/p\u003e\n\u003cp\u003eFor riders building an uncompromising Y1RS, it's one of the most effective weight-saving upgrades available—and proof that true performance is often found in the details.\u003c\/p\u003e","brand":"OVERFAST","offers":[{"title":"Forged Carbon","offer_id":57600374079832,"sku":null,"price":54.99,"currency_code":"GBP","in_stock":true},{"title":"3K Carbon","offer_id":57600374112600,"sku":null,"price":54.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/7611\/1704\/files\/1254.jpg?v=1782843731","url":"https:\/\/www.offthefront.cc\/products\/overfast-colnago-y1rs-carbon-fibre-ultralight-di2-battery-holder-shimano","provider":"Off The Front","version":"1.0","type":"link"}