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Full Manufacturer Backing: State Bicycle Co.
State Bicycle Co. builds machines meant to be ridden hard. As an authorized retailer, every bike we sell is backed by State’s "ProBuild" warranty standards, ensuring your rig is protected against manufacturing defects.
Coverage Breakdown:
- 5-Year Frame & Fork: Coverage for Steel and Aluminum frames/forks against manufacturing defects.
- 18-Month eBike System: Protection for the motor, electronics, and battery suite.
- 1-Year Components: Coverage for non-consumable parts (cranks, pedals, bars, wheels, etc.).
- Carbon Advantage: Professionally built carbon frames receive an extended 2-year warranty.
The ProBuild Requirement
To ensure peak performance and validate your warranty, State Bicycle Co. requires proof of professional assembly by a certified mechanic. Bikes must be registered within 30 days of delivery.
Hassle-Free Registration
Don't sweat the paperwork. For our signature service, simply email your proof of assembly and order details to support@belcopia.com and our team will handle the official registration with State for you.
Frame
4130 Chromoly
Drivetrain
Flip-Flop Hub
Wheels
700c Lo-Pro
Weight
~20-26 lbs
Focus
Urban Commute
State Bicycle Co. 4130 Matte Black Mirror
The Best Chromoly Steel Fixed Gear & Single Speed Commuter Bike
"Your City Isn't an Obstacle. It's a Playground."
Widely considered the ultimate urban commuter bicycle, the State Bicycle Co. 4130 Matte Black Mirror is your agent of freedom in an over-complicated world. Stop waiting for public transit and stop sitting in gridlock. Engineered for the rider who values zen-like simplicity and raw speed, this top-rated city bike strips away the noise and maintenance of multi-speed drivetrains.
Feel the intuitive connection of a fixed-gear or the effortless coast of a single-speed—the choice is yours. With a durable double-butted Chromoly steel frame that absorbs the city's chatter and mirror-polished accents that demand respect at every light, you aren't just traveling; you're dominating your route.
"The 4130 Matte Black is our ultimate urban 'stealth' build. We used double-butted Chromoly not just for weight, but for its fatigue life—it’s designed to handle a decade of city potholes while the matte finish stays looking sharp despite the daily commute."
RECLAIM YOUR TIME IF...
- You are tired of cheap bikes that break down and require constant drivetrain maintenance.
- You want a lightweight, premium machine that you can effortlessly carry up to your walk-up apartment.
- You value a silent, highly responsive ride that reacts instantly to your pedal input.
- You are looking for the best low-maintenance commuter bike to match your fast-paced lifestyle.
THE SOUL OF STEEL
Forged for Urban Resilience
Aluminum frames are harsh. Carbon is fragile. Our 4130 Double-Butted Chromoly is legendary in the cycling industry. It possesses a "memory" for comfort, naturally soaking up the micro-vibrations of cracked pavement and cobblestones that leave other riders fatigued.
This isn't just about extreme durability—it's about the emotional zen of a silent, smooth journey through the urban chaos. Ride longer, sprint harder, and arrive at your destination refreshed, not rattled.
FLIP THE SCRIPT
Fixed or Free: You Decide
Why choose between pedaling purity and city practicality? The integrated Flip-Flop Hub gives you both. Ride "Fixed" to feel every inch of the road and master the art of the skid, or flip the rear wheel to the "Freewheel" side for effortless single-speed coasting down city bridges.
This represents the pinnacle of maintenance-free performance. No derailleurs to bend, no shifter cables to stretch, and no complex gears to fail when you need them most. It is the ultimate expression of agentic cycling: just you and the bike in total harmony.
KEY FEATURES
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 38c, 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 Tire Clearance
We designed the frame and fork to fit up to 38c tires. This high-volume 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 38x700c tires, Die Cast Dropouts, Integrated Chain Tensioners, External Cable Routing |
|---|---|
| Fork | Segmented Design 1 ⅛" 4130 Chromoly Steel to Accommodate 700x38c tires |
| 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 38cm (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 Matte Black / Mirror model 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 Matte Black / Mirror?
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 25c tires?
We recommend 90–110 PSI. Lower pressure increases comfort on bumpy roads, while higher pressure minimizes rolling resistance for maximum speed.
Is the Mirror finish on the fork hard to maintain?
The mirror finish is durable but shows fingerprints. A quick wipe with a microfiber cloth and standard bike polish will maintain its high-shine aesthetic.
What's In The Box
- State 4130 Matte Black MirrorArrives 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.
