{"product_id":"4130-road-frame-fork-set-sapphire-chrome","title":"4130 Road - Frame \u0026 Fork Set - Sapphire \u0026 Chrome","description":"\u003cstyle\u003e\n  .fr-pdp { font-family: inherit; font-size: inherit; line-height: inherit; color: inherit; }\n  .fr-pdp h4 { font-size: 16px; font-weight: 700; margin: 30px 0 8px; border-bottom: 1px solid #e0e0e0; padding-bottom: 4px; }\n  .fr-pdp p { margin: 0 0 12px; }\n  .fr-pdp ul { margin: 0 0 12px; padding-left: 22px; }\n  .fr-pdp li { margin-bottom: 5px; }\n  .fr-pdp a { color: #0055cc; }\n  .fr-pdp .note { font-style: italic; font-size: 13px; color: #555; }\n  .fr-divider { border: none; border-top: 1px solid #e5e5e5; margin: 32px 0; }\n  .fr-callout { border-left: 3px solid #111; padding: 14px 20px; margin: 20px 0 16px; background: #fafafa; }\n  .fr-callout .ec-headline { font-size: 15px; font-weight: 700; color: #111; margin-bottom: 6px; }\n  .fr-callout .ec-body { font-size: 13px; color: #444; line-height: 1.6; }\n  .fr-name { display: block; font-size: 14px; font-weight: 700; margin-bottom: 6px; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"fr-pdp\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe 4130 Road, stripped to the two parts that decide how a bike rides.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDouble-butted 4130 chromoly frame and matching chromoly fork. Everything else is up to you.\u003c\/p\u003e\n\n\u003cp\u003eThe 4130 Steel Line earned its namesake from the double-butted 4130-grade chromoly used on the frame and fork — strength without compromising weight. This is the road version: classic lines, modern clearance, and an interface list with nothing proprietary on it anywhere.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eWhy start with a frameset\u003c\/h4\u003e\n\n\u003cp\u003eBecause you already know what you want, and you'd rather not pay for parts you're going to replace.\u003c\/p\u003e\n\n\u003cp\u003eMaybe you have a groupset sitting in a box. Maybe you've been collecting rim-brake components while everyone else moved to discs and you finally want a modern frame to hang them on. Maybe you just want to build something that's yours rather than buying something that's everyone's.\u003c\/p\u003e\n\n\u003cp\u003eThis frame is designed for that. Every interface on it is an established standard with decades of parts behind it — new, used, cheap, expensive, whatever you're working with.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eBuild it 1x or 2x\u003c\/h4\u003e\n\n\u003cp\u003eThe complete bike ships 1x8 with a 42T ring, which is the right call for most riders. The frame is not limited to it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe frame supports a full 2x drivetrain, with a maximum chainring size of 50\/34T.\u003c\/strong\u003e If you want a traditional compact road setup with a front derailleur and the tight gear steps that come with it, the frame accommodates it.\u003c\/p\u003e\n\n\u003cp\u003eThat makes this an unusually flexible platform. Build it simple and singlespeed-adjacent with a 1x, or build it as a proper geared road bike with a compact double and a wide-range cassette. Same frame either way.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003e700 x 40c clearance\u003c\/h4\u003e\n\n\u003cp\u003eThe frame clears up to \u003cstrong\u003e700 x 40c\u003c\/strong\u003e, which is a long way past what road frames of this shape used to allow.\u003c\/p\u003e\n\n\u003cp\u003eThat's the difference between a bike restricted to smooth pavement and one that handles the roads people actually ride — cracked asphalt, construction plating, rough bike lanes, the gravel connector between two paved sections. Run 28s if you want a fast summer setup, run 38s or 40s if you want comfort and puncture resistance, and change your mind whenever you like.\u003c\/p\u003e\n\n\u003cp\u003eThat figure is for the frame and the fork, and it holds whether you build 1x or 2x — the clearance doesn't change based on how you set up the drivetrain.\u003c\/p\u003e\n\n\u003cp class=\"note\"\u003eActual fitment varies with rim width and tire brand — a 40c on a wide rim measures wider than a 40c on a narrow one.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eThe geometry\u003c\/h4\u003e\n\n\u003cp\u003eRoad geometry, tuned by size rather than scaled from one drawing.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e425mm rear center across every size\u003c\/strong\u003e — chainstay length stays constant, so the balance between front and rear doesn't shift as the frame gets bigger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e45mm fork offset across every size\u003c\/strong\u003e — consistent trail and steering feel from a 49 to a 62\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e65mm BB drop\u003c\/strong\u003e — low enough for stability and cornering confidence, high enough for pedal clearance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e72° head angle on 49 and 52\u003c\/strong\u003e, 73.5° on 55, 59, and 62 — the smaller frames get a slacker front end to keep toe overlap manageable and handling calm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeat angles from 74.5° down to 73°\u003c\/strong\u003e as the frame grows, putting every rider in a comparable position over the bottom bracket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIt's a classic road position — not a racing crouch, not an upright hybrid. The kind of fit you can hold for four hours.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eBuilt on standards you can actually build on\u003c\/h4\u003e\n\n\u003cdiv style=\"display: flex !important; flex-wrap: wrap; gap: 12px; align-items: stretch; margin: 14px 0 8px;\"\u003e\n\n\u003cdiv style=\"flex: 1 1 250px; min-width: 230px; border: 1px solid #ddd; border-radius: 10px; padding: 14px; box-sizing: border-box;\"\u003e\n\u003cspan class=\"fr-name\"\u003eFrame \u0026amp; Cockpit\u003c\/span\u003e\n\u003cul style=\"margin: 6px 0 0; padding-left: 16px; font-size: 12.5px; color: #444;\"\u003e\n\u003cli\u003e1-1\/8\" threadless steerer\u003c\/li\u003e\n\u003cli\u003e27.2mm seatpost\u003c\/li\u003e\n\u003cli\u003e68mm English threaded BB\u003c\/li\u003e\n\u003cli\u003eTwo water bottle mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"flex: 1 1 250px; min-width: 230px; border: 1px solid #ddd; border-radius: 10px; padding: 14px; box-sizing: border-box;\"\u003e\n\u003cspan class=\"fr-name\"\u003eDrivetrain\u003c\/span\u003e\n\u003cul style=\"margin: 6px 0 0; padding-left: 16px; font-size: 12.5px; color: #444;\"\u003e\n\u003cli\u003e1x or 2x compatible\u003c\/li\u003e\n\u003cli\u003eMax chainring 50\/34T\u003c\/li\u003e\n\u003cli\u003eStandard derailleur hanger\u003c\/li\u003e\n\u003cli\u003eSquare taper or external BB, your choice\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"flex: 1 1 250px; min-width: 230px; border: 1px solid #ddd; border-radius: 10px; padding: 14px; box-sizing: border-box;\"\u003e\n\u003cspan class=\"fr-name\"\u003eWheels \u0026amp; Brakes\u003c\/span\u003e\n\u003cul style=\"margin: 6px 0 0; padding-left: 16px; font-size: 12.5px; color: #444;\"\u003e\n\u003cli\u003e100mm front \/ 130mm rear QR\u003c\/li\u003e\n\u003cli\u003eRim brake, caliper\u003c\/li\u003e\n\u003cli\u003e700c up to 40c clearance\u003c\/li\u003e\n\u003cli\u003eDecades of rim-brake wheels available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cp\u003eNo press-fit bottom bracket to creak. No proprietary seatpost. No integrated cockpit that locks you into one stem length. Nothing on this frame will be hard to find a part for in ten years.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eSizing\u003c\/h4\u003e\n\n\u003cp\u003eFive sizes. Height ranges below, with inseam as a cross-check — inseam is the more reliable guide when you're picking your own cockpit.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e49 cm\u003c\/strong\u003e — inseam 26.5\" – 28.5\"  ·  riders 5'5\" – 5'8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e52 cm\u003c\/strong\u003e — inseam 28.5\" – 31\"  ·  riders 5'7\" – 5'10\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55 cm\u003c\/strong\u003e — inseam 31\" – 32.5\"  ·  riders 5'9\" – 6'0\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e59 cm\u003c\/strong\u003e — inseam 32.5\" – 34\"  ·  riders 5'11\" – 6'3\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e62 cm\u003c\/strong\u003e — inseam 34\" – 36\"  ·  riders 6'2\" – 6'7\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp class=\"note\"\u003eSizes overlap on purpose. If you fall between two, the smaller size gives a more nimble, upright fit and the larger one stretches you out. Full numbers — reach, stack, standover, wheelbase, and tube lengths for every size — are on our \u003ca href=\"https:\/\/www.statebicycle.com\/pages\/size-charts-full-specs\"\u003egeometry chart\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eWhat's included\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003eFrame\u003c\/li\u003e\n\u003cli\u003eFork\u003c\/li\u003e\n\u003cli\u003eHeadset\u003c\/li\u003e\n\u003cli\u003eSeatpost clamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eEverything else is yours to choose. The headset and seatpost clamp being included matters more than it sounds — they're the two small parts that are easy to forget when you're ordering a build, and the two that stop the project dead when they don't show up.\u003c\/p\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e Double-butted 4130 chromoly steel, TIG welded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFork:\u003c\/strong\u003e 4130 chromoly steel, 1-1\/8\" threadless steerer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeadset standard:\u003c\/strong\u003e 1-1\/8\" threadless\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottom bracket shell:\u003c\/strong\u003e 68mm English threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeatpost:\u003c\/strong\u003e 27.2mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake type:\u003c\/strong\u003e Rim brake, caliper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub spacing:\u003c\/strong\u003e 100mm front \/ 130mm rear, quick release\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 1x or 2x, max chainring 50\/34T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax tire clearance:\u003c\/strong\u003e 700 x 40c (frame and fork)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottle mounts:\u003c\/strong\u003e Two\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e 49, 52, 55, 59, 62 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Frame, fork, headset, seatpost clamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\n\u003cdiv class=\"fr-callout\"\u003e\n\u003cdiv class=\"ec-headline\"\u003eWant it built instead?\u003c\/div\u003e\n\u003cdiv class=\"ec-body\"\u003eThe complete 4130 Road ships ready to ride with a 1x8 drivetrain, integrated drop-bar shifters, 38mm tires, and rim brakes — in three colorways. \u003ca href=\"https:\/\/www.statebicycle.com\/collections\/4130-road-bikes-8-speed\"\u003eSee the complete bikes →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003chr class=\"fr-divider\"\u003e\n\u003cp class=\"note\"\u003e\u003cstrong\u003eWant to get technical?\u003c\/strong\u003e \u003ca href=\"https:\/\/www.statebicycle.com\/pages\/size-charts-full-specs\"\u003eFull Geo \/ Specs here\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"State Bicycle Co.","offers":[{"title":"49 cm (Riders 5'5\"-5'8\")","offer_id":44308518338647,"sku":"731416175043","price":349.99,"currency_code":"USD","in_stock":true},{"title":"52 cm (Riders 5'7\"-5'10\")","offer_id":44308518371415,"sku":"731416175050","price":349.99,"currency_code":"USD","in_stock":true},{"title":"55 cm (Riders 5'9\"-6'0\")","offer_id":44308518404183,"sku":"731416175067","price":349.99,"currency_code":"USD","in_stock":true},{"title":"59 cm (Riders 5'11\"-6'3\")","offer_id":44308518436951,"sku":"731416175074","price":349.99,"currency_code":"USD","in_stock":true},{"title":"62 cm (Riders 6'2\"-6'7\")","offer_id":44308518469719,"sku":"731416175081","price":349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0232\/3305\/files\/4130Road-Frame_ForkSet-Sapphire_Chrome-1.jpg?v=1789680623","url":"https:\/\/www.statebicycle.com\/products\/4130-road-frame-fork-set-sapphire-chrome","provider":"State Bicycle Co.","version":"1.0","type":"link"}