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\n\n

The 4130 All-Road is built for riders who want to do everything — gravel races, bikepacking missions, commutes, trail days — without buying multiple bikes or compromising on any of them. A fully revamped 4130 Chromoly Steel frame with UDH compatibility, dropper-post readiness, semi-internal cable routing, and mounts for bottles, racks, fenders, and accessories gives you a platform that can be set up for almost anything.

Platform Highlights

\n4130 Chromoly Steel Frame — Tough, repairable, and with a ride quality that carbon can't replicate. Built for the long haul.
\nUDH-Compatible — Universal Derailleur Hanger means no hunting for proprietary parts anywhere in the world.
\nDropper Post Ready — Internal routing already in place. Add a dropper whenever you're ready.
\nSemi-Internal Cable Routing — Cleaner than fully external, easier to service than fully internal.
\nTire Clearance — Plenty of room for real-world rubber in any configuration:\n
- \nFrame & Standard Fork: 700c x 55mm (2.25\") or 650b x 60mm (2.4\")
- \nFrame & Monster Fork (Carbon): 700c x 55mm (2.25\") or 650b x 50mm (2.25\")
\n
\nMounts for Everything — 3 water bottle mounts plus rack, fender, and accessory mounts. Pack it up or strip it down.

Build & Customize

Wheelset — choose your build

\n700c — Fast & Versatile\n

23mm tubeless-capable rims (tape, valves, and sealant required)
Continental Terra Hardpack TR 50mm
Best for: gravel racing, mixed-surface riding, fast days out

\nIncluded\n

\n650b — Capable & Comfortable\n

25mm tubeless-capable rims (tape, valves, and sealant required)
Vittoria Barzo 2.1\" knobby tires
More volume, more grip, more trail capability
Best for: bikepacking, rough terrain, off-road days

\nIncluded\n

💡 Want both? Add the dual wheelset option — wheels, tires, tubes, rotors, and cassette — for $299.99. Swap between setups in minutes.

The 700c tire: one of the fastest-rolling 50mm gravel tires you can buy.

The Continental Terra Hardpack TR 50 scored 18.6 watts rolling resistance in independent lab testing at BicycleRollingResistance.com — earning a 4.5/5 \"Highly Recommended\" rating and putting it among the fastest gravel tires at this width. A flat central tread keeps things quick on pavement and hard-pack, while developed shoulder lugs and Continental's ShieldWall puncture protection handle the rough stuff. PureGrip compound means grip and durability don't get traded off against each other. At 50mm, this tire smooths out terrain that would rattle a narrower setup — without giving up speed.

Fork — choose your setup

\n4130 Chromoly Steel Fork\n

Matched to the frame — same ride character
12x100mm thru-axle
Mounting points for racks and accessories

\nIncluded\n

\nCarbon Fiber \"Monster Fork\"\n

Saves over 1.25 lbs vs steel fork
Geometry-altering flip-chip for fit adjustment
Improved comfort and front-end stiffness

\n+$299.99\n

\nAll-Road Suspension Fork\n

40mm travel — takes the edge off rough terrain
Noticeably smoother on chunky gravel and trails
Regular MSRP $450 — available here for $350

\n+$350\n

Complete Component Spec

Frame

4130 Chromoly Steel with Thru-Axle Dropouts (142mm rear spacing)
UDH-Compatible derailleur hanger
Semi-Internal Cable Routing
Dropper Post Ready
Mounts for 3 water bottles, racks, fenders, and accessories

Drivetrain

12-Speed State Bicycle Co. drivetrain
Crank: 40t Direct Mount Chainring
Cassette: 11–46t (upgrade to 11–50t available for $69.99)

Cockpit & Brakes

Gravel handlebar with 33° flare
\nCable-Actuated Hydraulic Disc Brakes with compressionless housing
Note: SRAM drivetrain upgrades include full hydraulic brakes

Rims

\n700c: 23mm tubeless-capable (tape, valves, and sealant required)
\n650b: 25mm tubeless-capable (tape, valves, and sealant required)

Tires

\n700c: Continental Terra Hardpack TR 50mm — tubeless ready
\n650b: Vittoria Barzo 2.1\" — not tubeless rated

⚠️ Please note: the Vittoria Barzo tires (650b) are not rated tubeless. While it may be possible to set these up tubeless, we cannot guarantee compatibility. State Bicycle Co. recommends professional assembly for tubeless setups.

Available Upgrades

Drivetrain

\nSRAM Rival XPLR AXS — Wireless 13-Speed\n

Rival E1 carbon levers & hydraulic brakes
Rival XPLR rear derailleur
Rival 10–46t 13-speed cassette
SRAM Flat-Top chain
Battery & charger included
Apex D1 - 170mm Crank - 42t
\n
Best for: riders who want a wider range and more refined components for longer days in the saddle

\n+$999.99\n

\nSRAM Eagle Transmission \"Mullet\" AXS — Wireless 12-Speed\n

Rival E1 carbon levers & hydraulic brakes
S1000 T-Type rear derailleur
Eagle 10–52t cassette (XS1270) — massive range
Eagle T-Type chain
Battery & charger included
Apex D1 - 170mm Crank - 42t
\n
Best for: big mountain days, loaded bikepacking, or anyone who wants to spin up anything

\n+$999.99\n

Wheels

\nDual Wheelset (700c + 650b) — $299.99. Both wheel sizes, both tire setups, rotors, cassette, and tubes included.
\nDT Swiss Alloy Wheelset — +$450. Available in 650b or 700c. A meaningful step up in stiffness, weight, and hub quality.
\nZipp Carbon Wheelsets — Starting at $965 (reg. $1,400). Tubeless only, sealant included. The fastest wheel upgrade available for this build.

Size Recommendations

\nXS: 5'1\" – 5'6\"
\nS: 5'5\" – 5'10\"
\nM: 5'9\" – 6'2\"
\nL: 6'1\" – 6'5\"

Want to get technical? Full Geo / Specs here.

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4130 All-Road - Alpine Bloom (12 Speed / UDH)(650b)

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