State Bicycle Co. 4130 Fixed Gear & Single Speed Bike
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} .sbc-product-wrapper .faq-answer { padding: 0 0 20px 0; font-size: 0.9em; color: #555; line-height: 1.6; margin: 0; } Frame Material 4130 Chromoly Drivetrain Fixed / Single Speed Wheel Size 700c Weight ~22 lbs Use Type Commuter / All-Road State Bicycle 4130 fixed gear & single speed "Own the Asphalt. Conquer the Gravel." Widely considered the ultimate urban and all-terrain statement piece, the State Bikes 4130 Steel Line is your agent of freedom in an over-complicated world. Stop waiting for public transit and stop blending into the crowd. Engineered for the rider who values zen-like simplicity and head-turning aesthetics, this top-rated State bicycle 4130 all road machine strips away the noise and maintenance of complex drivetrains. Feel the intuitive connection of a fixed-gear or the effortless coast of a single-speed—the choice is yours. Built on a foundation of incredibly rugged double-butted Chromoly and designed to excel as a swift State 4130 road bike or a rugged State bicycle gravel bike, you aren't just traveling; you're dominating your route. Now with clearance for wide 45c tires, this State all road 4130 is ready for anything. It is, simply put, the ultimate State bike 4130. "The 4130 Steel Line brings a vibrant, premium energy to our ultimate 'classic' build. We use double-butted Chromoly not just for weight savings, but for its fatigue life—it’s designed to handle a decade of city potholes and gravel trails while keeping you looking sharp despite the daily commute." — State Bicycle Co. Product Team OWN THE STREETS IF... You want one beautiful, durable bike for commuting, fitness, and all-road exploration. You appreciate the legendary ride quality and "feel" of a premium steel frame. You love the pure, simple experience of a single-speed or fixed-gear bike. You need a versatile machine that can handle both smooth pavement and rougher paths. BUILT TO BE ADMIRED A Ride Like No Other There's a tangible character to a steel bike that you have to feel to understand. The Double-Butted 4130 Chromoly frame is the heart of this machine, engineered to be both strong and forgiving. Feel how it mutes the high-frequency road chatter, taking the edge off of rough surfaces and reducing fatigue on long rides. Sense its lively, "springy" feedback as you accelerate and carve through corners. It’s a dynamic, comfortable, and deeply engaging ride that connects you to your journey. ALL-ROAD CAPABLE One Bike, Any Road This is our most capable 4130 Steel Line yet. The redesigned frame now has clearance for tires up to 45c, transforming it from a classic road bike into a versatile all-road weapon. Feel the plush, confident grip of wider tires as you float over cracked pavement and hard-packed dirt that would rattle a traditional road bike. It’s a tangible sense of freedom that allows you to choose your path, not be limited by it. Pavement, potholes, or gravel—this bike is ready. KEY FEATURES *Note: The component macro shots below feature the Tropical Red colorway to showcase detail. Your bicycle will arrive in the colorway selected above. Swipe to see more → Double-Butted 4130 Thicker at the ends for strength, thinner in the middle for weight savings. The gold standard for urban steel bicycles. Flip-Flop Hub Includes a 16T freewheel and fixed gear cog. Seamlessly switch between track-style fixed gear riding and relaxed coasting. Lo-Pro Wheelset V-style deep rims paired with sealed bearing hubs. Smooth, fast, and built to take a severe beating from city potholes. Dual Caliper Brakes Includes front and rear caliper brakes out of the box, ensuring safe, reliable stopping power for unpredictable city traffic. Massive Tire Clearance The steel frame is designed to accommodate tires up to 45c, allowing for a plush, gravel-ready ride on any surface. Custom Handlebars Choose your cockpit: aggressive All-Road Flared Drops or comfortable, wide riser bars for upright city cruising. SEE IT IN ACTION WHY THIS BUILD MATTERS The 4130 isn't just about looks. It's meticulously engineered for urban survival. Here is the technical breakdown of why this bike outperforms standard commuters. Double-Butted 4130 Steel Unlike standard high-tensile steel, our 4130 Chromoly features variable wall thickness. It maintains a staggering 100,000 PSI tensile strength at the joints while shaving off excess material in the center, resulting in a frame that is 20% lighter without sacrificing durability. 16 Unique Skid Patches If you ride fixed, you know the pain of burning through rear tires. Our optimized 46/16 gear ratio is mathematically engineered to distribute your stopping friction across 16 unique skid patches, effectively tripling your rear tire life compared to a standard 48/16 setup. Massive 38c-45c Tire Clearance We designed the frame and fork to fit massive high-volume tires. This rubber acts as a "natural suspension" system, absorbing up to 35% more road vibration than traditional 25c commuter tires, turning brutal city potholes into minor bumps. Technical Specifications Frame Double-Butted 4130 Chromoly Steel, TIG Welded w/ "wishbone" rear to Accommodate up to 45c tires, Die Cast Dropouts, Integrated Chain Tensioners, External Cable Routing Fork Segmented Design 1 ⅛" 4130 Chromoly Steel Bottom Bracket Sealed Cartridge, JIS Square Taper, English Threaded, 68mm x 103mm Brakes Dual Pivot Forged Alloy (Clamp Diameter: 22.2mm for Risers, 31.8mm for Dropbars) Chain & Chainring YAB Chain | Steel 46T, 130 BCD Chainring Crank Steel Forged Crank, 130 BCD, 170mm Crank Arms Handlebars Wide Riser (Oversized 31.8 clamp, 600mm W, 30mm Rise) OR All-Road Dropbars (Oversized 31.8 clamp, 500mm drops/420mm top, 18° flare) Headset & Stem 1 ⅛" threadless Headset | 3D-Forged Alloy Stem (OS 31.8mm clamp, Length: 90mm, Rise: +/- 7°) Hubs Sealed Bearing, Flip-Flop Hub (16T Freewheel and Fixed Cog), Spacing: F:100mm / R:120mm, Bolts: M10 Wheels Tubeless-Capable 700c with CNC side-wall, 28mm Depth / 18mm Width (Rim Inside Width: 18mm) Spokes 14G Steel, 3 Cross Pattern (Deep V F/R: 270mm | Lo Pro F: 296mm / R: 294mm) Tires 700c x 38c (Min tire width: 700x25c / Max tire width: 700x45c) Seatpost & Clamp Aluminum, D: 27.2mm, L: 300mm | Clamp: Aluminum, D: 29.5mm Saddle & Pedals Polyurethane w/ Steel Rails | Welgo Brand Alloy Pedals Sizing & Frame Geometry Rider Sizing Guide Frame Size Rider Height Inseam (in) 46 cm 5'3" - 5'6" 26.5" - 28.5" 49 cm 5'5" - 5'8" 28" - 29.5" 52 cm 5'7" - 5'10" 29" - 32" 55 cm 5'9" - 6'0" 31.5" - 34" 59 cm 5'11" - 6'3" 33.5" - 35.5" 62 cm 6'2" - 6'7" 35" - 37" Detailed Geometry Measurements Measurement 46cm 49cm 52cm 55cm 59cm 62cm Actual Top Tube Length 542mm 550mm 555mm 565mm 597mm 600mm BB Drop 65mm 65mm 65mm 65mm 65mm 65mm Chain Stay Length 434mm 434mm 434mm 434mm 434mm 434mm Complete Bike Wgt (D / R)* 9.3kg / 9.1kg 9.6kg / 9.4kg 10.36kg / 10.28kg 10.96kg / 10.78kg 11.61kg / 11.41kg 12.2kg / 12.05kg Crank Arm Length 170mm 170mm 170mm 170mm 170mm 170mm Effective Top Tube 542mm 550mm 555mm 565mm 597mm 600mm Fork Length 408mm 408mm 408mm 408mm 408mm 408mm Fork Offset 45mm 45mm 45mm 45mm 45mm 45mm Frame Set Weight 3230g 3260g 3340g 3380g 3440g 3570g Head Tube Length 95mm 95mm 95mm 105mm 140mm 160mm Head Tube Angle 72° 72° 72° 73.5° 73.5° 73.5° Reach 393mm 395mm 390mm 391mm 418mm 421mm Seat Tube 460mm 490mm 520mm 550mm 590mm 620mm Seat Tube Angle 74.5° 74.5° 74° 73° 73° 73° Stack 537mm 537mm 537mm 551mm 585mm 604mm Standover Height 755mm 769mm 801mm 823mm 838mm 863mm Wheel Base 1023mm 1025mm 1028mm 1011mm 1048mm 1050mm *Weight variants: D = Drop Bars, R = Riser Bars Frequently Asked Questions What is the standover height of the 4130 frame? Standover height ranges from 29.1" on the 49cm frame to 33.7" on the 62cm frame. We recommend measuring your actual inseam to ensure at least 1 inch of clearance over the top tube. Can I ride this bike if I’ve never ridden a fixie before? Yes. Every 4130 ships with a Flip-Flop Hub, allowing you to easily switch between Fixed Gear and a standard Single-Speed Freewheel that allows you to coast. Does the 4130 Steel Line come with brakes? Yes, this model includes both front and rear dual-pivot caliper brakes and levers, making it 100% street-legal and safe for urban riding. What is the benefit of a 4130 Chromoly Steel frame? 4130 Chromoly is double-butted steel that is stronger and lighter than high-tensile steel, offering superior vibration dampening for a smoother ride on rough pavement. What is the gear ratio on the 4130 Steel Line? The bike features a 46x16 gear ratio. This setup is optimized for city commuting, providing a balanced blend of climbing torque and flat-land speed. How much does the 4130 Fixed Gear weigh? The average weight is approximately 22 lbs 10 oz for a 55cm frame, providing a stable and planted feel in city traffic compared to lighter aluminum models. How often should I tension the chain? We recommend checking tension every 100–200 miles. Horizontal dropouts allow for easy adjustment to prevent chain drop and ensure a quiet drivetrain. What tire pressure should I run in the stock tires? We recommend 90–110 PSI. Lower pressure increases comfort on bumpy roads, while higher pressure minimizes rolling resistance for maximum speed. What's In The Box State 4130 Steel LineArrives 90% assembled. Just attach the front wheel, pedals, and handlebars. Pedal SetWellgo Alloy Pedals included. No need to buy aftermarket pedals. Braking SystemBoth Front and Rear caliper brakes are included in the box. × // [CHECKLIST #14] Smart Event Delegated Lightbox function initSmartLightbox() { const wrapper = document.querySelector('.sbc-product-wrapper'); const modal = document.getElementById('belcopia-image-modal'); const modalImg = document.getElementById('belcopia-modal-img'); const closeBtn = document.querySelector('.belcopia-modal-close'); if (!wrapper || !modal || !modalImg) return; wrapper.addEventListener('click', (e) => { const zoomableImg = e.target.closest('.two-col-container img:not(.video-facade-wrapper img), .belcopia-slide img, .sizing-container img, .feature-card img'); if (zoomableImg) { e.preventDefault(); modalImg.src = zoomableImg.src; modal.classList.add('show'); // [CHECKLIST #15] Lock background scrolling document.body.style.overflow = 'hidden'; closeBtn.focus(); } }); const closeModal = () => { modal.classList.remove('show'); // [CHECKLIST #15] Purge image memory after fade setTimeout(() => { modalImg.src = ''; }, 300); document.body.style.overflow = ''; }; closeBtn.addEventListener('click', closeModal); modal.addEventListener('click', (e) => { if (e.target === modal) closeModal(); }); document.addEventListener('keydown', (e) => { if ((e.key === 'Escape' || e.key === 'Enter') && modal.classList.contains('show')) closeModal(); }); } // Multi-Image Carousel Logic function initBelcopiaSliders() { const sliders = document.querySelectorAll('.belcopia-slider'); // [CHECKLIST #16] Intersection Observer to pause sliders off-screen const observer = new IntersectionObserver((entries) => { entries.forEach(entry => { entry.target.dataset.isVisible = entry.isIntersecting ? 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['scroll', 'mousemove', 'touchstart', 'keydown'].forEach(event => { window.removeEventListener(event, loadDeferredScripts); }); } // [CHECKLIST #18] Link Prefetching (Predictive Loading) via Speculation Rules let prefetchCache = new Set(); function initPrefetcher() { if (HTMLScriptElement.supports && HTMLScriptElement.supports('speculationrules')) { const specScript = document.createElement('script'); specScript.type = 'speculationrules'; specScript.textContent = JSON.stringify({ prerender: [{ source: "document", where: { and: [{ href_matches: "/*" }, { not: { href_matches: ["/cart*", "/checkout*"] } }] }, eagerness: "moderate" }] }); document.head.appendChild(specScript); return; } // Fallback Hover-Prefetcher document.addEventListener('mouseover', (e) => { const link = e.target.closest('a'); if (link && link.href && link.origin === window.location.origin) { if (!prefetchCache.has(link.href) && !link.href.includes('/cart') && !link.href.includes('/checkout')) { link.prefetchTimeout = setTimeout(() => { const prefetchTag = document.createElement('link'); prefetchTag.rel = 'prefetch'; prefetchTag.href = link.href; document.head.appendChild(prefetchTag); prefetchCache.add(link.href); }, 65); } } }); document.addEventListener('mouseout', (e) => { const link = e.target.closest('a'); if (link && link.prefetchTimeout) { clearTimeout(link.prefetchTimeout); } }); } // Initialize Everything if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', () => { initBelcopiaSliders(); initSmartLightbox(); initVideoFacades(); // [CHECKLIST #17] Wait for browser to be completely idle before setting up prefetcher if ('requestIdleCallback' in window) { requestIdleCallback(initPrefetcher); } else { setTimeout(initPrefetcher, 200); } }); } else { initBelcopiaSliders(); initSmartLightbox(); initVideoFacades(); if ('requestIdleCallback' in window) { requestIdleCallback(initPrefetcher); } else { setTimeout(initPrefetcher, 200); } } // Listen for user intent to trigger deferred scripts ['scroll', 'mousemove', 'touchstart', 'keydown'].forEach(event => { window.addEventListener(event, loadDeferredScripts, { passive: true }); });
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