4130 Trail - Mountain Bike - Raw Phosphate

Tough as nails and ready for anything, the State Bicycle Co. 4130 Trail Mountain Bike is a no-BS trail machine designed to crush climbs, rip descents, and handle whatever you throw at it. Whether you're slashing singletrack, hammering urban shortcuts, or packing up for an epic bikepacking trip, this bike is built to send it.

*Bike pictured with Industry Nine Sector Carbon wheels and Seekrun S7 wireless dropper upgrades.

Quick Features

• Progressive Trail Geometry: A slack 65° head angle, low-slung top tube, and long front-center keep things stable when the trail gets rowdy while maintaining playful agility in the corners.
• 12-Speed Shimano Deore Drivetrain: A tough-as-hell 1x12 setup with Deore M6100 shifter and rear derailleur, paired with an 11–50T cassette for big climbing range and clean, reliable shifting.
• Double-Butted 4130 Chromoly Steel Frame: Tougher than aluminum and smoother than carbon, our double-butted 4130 Chromoly frame absorbs trail chatter and takes a beating without flinching.
• RockShox Psylo Silver RC — 130mm Travel, 35mm Stanchions: At this price you'd normally see a budget fork with spindly stanchions and questionable performance. Not here. 35mm upper tubes for steering precision on technical descents, with a Motion Control damper, Solo Air spring, and premium bushings that cut friction over rough ground.
• Universal Derailleur Hanger (UDH): Future-proofed for modern drivetrain tech and easier maintenance, because you shouldn't be stressing parts availability.
• Dropper Ready — Cabled or Wireless: A 31.6mm seat tube with internal routing means a cabled dropper drops right in, and the frame is equally happy running a fully wireless post with zero cables to route.
• Threaded Bottom Bracket (73mm BSA): Reliable, creak-free, and easy to service.
• More Mounting Points: Triple bottle cage mounts on the downtube — because adventure doesn't come with limits.

The drivetrain

Shimano Deore is the part of the lineup where the price stops mattering and the performance starts. M6100 gets the same shift ramps and chain management philosophy as the tiers above it, in a package built to survive being ignored.

An 11–50T cassette against the 32T ring gives 454% of range — a low gear at 0.64:1 that will get you up genuinely steep, loose climbs, and enough at the top for fire roads and flat transfers. One shifter, one derailleur, nothing to cross-chain, and no front shift to fumble mid-climb.

No drama, no fluff. Crisp shifting that keeps working when things get dusty, muddy, and questionable.

Build & Customize

Frame Size

• XS/S: Riders 5'1" – 5'5"
• S/M: Riders 5'5" – 5'10"
• M/L: Riders 5'10" – 6'1"
• XL: Riders 6'1" – 6'5"

Choose Your Wheelset

Choose Your Seatpost — a dropper is the single biggest upgrade you can make to a trail bike. Two ways to get one.

Both droppers are sized to your frame automatically — pick your frame size and we'll send the right travel.

Choose Your Brakes

Choose Your Handlebar

Standard Equipment

• Frame: Double-butted 4130 Chromoly steel, UDH, 73mm BSA threaded BB, internal dropper routing
• Fork: RockShox Psylo Silver RC — 130mm travel, 35mm stanchions
• Drivetrain: 1x12 Shimano Deore
• Shifter & Rear Derailleur: Shimano Deore M6100
• Cassette: 11–50T, 12-speed
• Chain: SUMC 12-speed
• Crankset: SBC 32T narrow-wide, 165mm, direct mount
• Saddle: Trail-ready PU pad with steel rails
• Stem: SBC 3D-forged alloy, 35mm clamp
• Pedals: Not included

Max Tire Clearance

• Frame: 29" up to 2.6" / 27.5" up to 3.0"
• Fork: 29" up to 2.6" / 27.5" N/A

⚠️ Assembly Required: This bike ships partially unassembled and will require crank installation, wheel installation, and fork setup (the steerer tube comes uncut). It will also need general setup and tuning, including derailleur indexing and limit screw adjustment. We strongly recommend professional assembly to ensure the safest and highest quality ride experience.

*Bike pictured with Industry Nine Sector Carbon wheels and Seekrun S7 wireless dropper upgrades.

Want to get technical? Full Geo / Specs here.

Press quotations from BIKE Magazine, Bikepacking.com, and Pinkbike, referenced for context and not endorsements of this specific build configuration.