{"product_id":"gravelbikeframe","title":"S-PARTS Titanium Alloy Gravel Bike Frame","description":"\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/S-PARTS_600x600.gif?v=1720602474\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eWHY GRAVLE?\u003c\/h2\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cstrong\u003eAt the inception of designing the first mass-produced titanium alloy bike frame for S-PARTS, we contemplated two questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003col\u003e\n\u003cli style=\"font-weight: bold;\" data-mce-style=\"font-weight: bold;\"\u003e\u003cstrong\u003eWhat type of bicycle is best suited for titanium alloy construction?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\" data-mce-style=\"font-weight: bold;\"\u003e\u003cstrong\u003eWhat kind of riding experience and lifestyle should an exceptional titanium alloy bicycle provide?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003e[Choose, Think, Create]\u003c\/h2\u003e\n\u003cp\u003eTitanium's inherent mechanical properties provide a perfect balance between torsional rigidity and vertical damping. It ensures the lateral stiffness needed for high power output during pedaling while absorbing vertical bumps from various complex terrains and filtering high-frequency vibrations. This makes it not only suitable for paved roads but also destined to break free from urban constraints and race through the wild. Whether it's short sprints or long journeys, these are its specialties. This reliable titanium alloy companion is always ready to join you on an adventure, embracing the mountains and rivers that await.\u003c\/p\u003e\n\u003cp\u003eThat's why \"Gravel\" is the most beautiful interpretation of a titanium bike.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiang1_600x600.png?v=1720582188\" style=\"margin-bottom: 16px; float: none;\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiang1_600x600.png?v=1720582188\" data-mce-style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" data-mce-style=\"text-align: left;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eCROSS CONTROL SYSTEM 2.0\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is the crowning design that we have meticulously developed and finally achieved for mass production. Years ago, when S-PARTS began its custom titanium frame business, we insisted on using a design where the seat stays connect to the top tube, which we termed \"CROSS CONTROL\" technology. This method effectively uses the passive deformation of metal to absorb road bumps in non-suspension frames. However, due to early technological limitations, we had to conservatively weld the connection between the seat stays and the seat tube. While this ensured the frame's strength, it significantly compromised the original goal of vertical shock absorption, which was undoubtedly frustrating.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing3_480x480.png?v=1720582803\" style=\"margin-right: -252px; float: none;\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing3_480x480.png?v=1720582803\" data-mce-style=\"margin-right: -252px; float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003eFor years, this issue has been on our minds, and the S-PARTS team never gave up on finding the optimal solution. In 2023, we introduced new hydraulic bending equipment and internationally advanced calibration and testing instruments. With these resources, we ventured into more daring tube and profile designs, using 3D software to simulate a completely disconnected structure between the seat stays and the seat tube, which we successfully achieved in simulations. This led to the creation of the \"CROSS CONTROL 2.0\" system we have today.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing4_480x480.png?v=1720593362\" style=\"float: none;\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing4_480x480.png?v=1720593362\" data-mce-style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003eWe chose slimmer seat stays, internally hydroformed to maintain support strength while providing ample clearance. This design allows for controlled physical deformation on rough roads, achieving the intended shock absorption function. To increase the contact area and vertical support strength at the weld points between the stays and the top tube, we used a special vertical pressing mold at both ends of the top tube. This created two elliptical cross-sections—one horizontal at the head tube and one vertical at the seat tube—achieving both aesthetic and functional benefits.\u003c\/p\u003e\n\u003ch2\u003eASYMMETRIC REAR FORK\u003c\/h2\u003e\n\u003cp\u003eTraditional metal frames, when requiring compatibility with both large chainrings and wide tires, usually compress the drive-side chainstay to form a dent. This is an unavoidable compromise that inevitably damages the original tube wall structure, resulting in a loss of strength.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing6_480x480.png?v=1720594500\" style=\"float: none;\" data-mce-style=\"float: none;\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing6_480x480.png?v=1720594500\"\u003e\u003c\/p\u003e\n\u003cp\u003eS-PARTS designed a connector CNC-carved from a single piece of titanium alloy plate, perfectly solving this issue in multiple ways:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eThe solid titanium alloy connector provides higher connection strength than tube materials, ensuring drive-side pedaling rigidity.\u003c\/li\u003e\n\u003cli\u003eThe 6mm wide plate offers considerable installation space for both tires and chainrings, allowing the GRAVEL frame to accommodate tires up to 42c and chainrings up to 48t.\u003c\/li\u003e\n\u003cli\u003eThe asymmetric recessed design also provides more chain movement space, significantly reducing the chance of chain-to-chainstay collisions during extreme bumps.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg height=\"806\" width=\"564\" style=\"float: none; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing7_480x480.png?v=1720595744\" data-mce-style=\"float: none; display: block; margin-left: auto; margin-right: auto;\" data-mce-src=\"https:\/\/cdn.shopifycdn.net\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing7_480x480.png?v=1720595744\"\u003e\u003c\/p\u003e\n\u003ch2\u003eInternal cable routing \/ CNC rear dropout \/ UDH derailleur hanger \/ T47 bottom bracket\u003c\/h2\u003e\n\u003cp\u003e\u003cimg style=\"float: none; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing8_480x480.png?v=1720596747\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/xiangqing8_480x480.png?v=1720596747\" data-mce-style=\"float: none; display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe frame features a 52mm integrated headset with uniform diameter, supporting ACR and DCR systems for fully internal cable routing with both integrated and non-integrated handlebars.\u003c\/p\u003e\n\u003cp\u003eThe fully CNC-machined flat mount brake caliper installation base ensures high strength and precise mounting holes for quick and accurate setup, delivering sharp and powerful braking performance.\u003c\/p\u003e\n\u003cp\u003eThe entire series is equipped with the UDH direct mount dropout system, compatible with nearly all rear derailleurs on the market.\u003c\/p\u003e\n\u003cp\u003eThe T47 threaded bottom bracket, standard across the series, is the optimal solution for metal frames, offering excellent stability, pedaling stiffness, and minimal noise risk. For 24mm spindle specifications, it supports a fully hidden brake hose routing solution within the bottom bracket shell.\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"float: none; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/chejia_canshu_600x600.png?v=1720598293\"\u003e\u003c\/p\u003e\n\u003ch2\u003eFrame Assembly Guidelines\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHead Tube\u003c\/strong\u003e: Use upper and lower 52mm integrated bearing headsets, ensuring compatibility with ACR or DCR system internal cable routing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFork\u003c\/strong\u003e: Optimal fork specifications for this frame are a length range of 389-400mm (excluding suspension forks), an offset range of 48-55mm, and a maximum tire clearance \u0026gt;42c.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBottom Bracket and Crankset\u003c\/strong\u003e: The frame's bottom bracket shell width is 68mm and requires a T47 external bearing bottom bracket. The specific model depends on the crankset used; please consult your retailer or S-PARTS official customer service. The frame supports a maximum chainring size of 48T.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShifting and Braking\u003c\/strong\u003e: The frame is compatible with DI2, AXS electronic shifting systems, and similar electronic shifting products (not compatible with any mechanical shifting systems). The frame only supports FLATMOUNT disc brake systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSeat Post\u003c\/strong\u003e: Only compatible with 27.2mm diameter round seat posts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWheelset\u003c\/strong\u003e: Only compatible with 700c wheel specifications and 12mm thru-axle road wheelsets.\u003c\/p\u003e\n\u003cp\u003e \u003cimg style=\"float: none; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/8c6db81bad1f7fab20f937b5a3deb50b_600x600.jpg?v=1720598624\" width=\"348\" height=\"686\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/S-PARTS_16_600x600.jpg?v=1720598752\" style=\"float: none; display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eGravel frame fatigue test report - Chinese\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/20240715110653_28b7ae18-6598-4f31-a60d-81f73332fa22.jpg?v=1721013477\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"S-PARTS","offers":[{"title":"S","offer_id":49157060362508,"sku":"","price":2199.0,"currency_code":"USD","in_stock":true},{"title":"M","offer_id":49157060395276,"sku":"","price":2199.0,"currency_code":"USD","in_stock":true},{"title":"L","offer_id":49157060428044,"sku":"","price":2199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/6454\/9388\/files\/zhu0_9dc92c86-f38b-4649-9d4c-e4e19eaf292b.jpg?v=1720581042","url":"https:\/\/www.spartsti.com\/ja\/products\/gravelbikeframe","provider":"S-PARTS","version":"1.0","type":"link"}