4130 Trail - Mountain Bike - Frame Set - Raw Phosphate
- Limited Availability
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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.
The 4130 Trail frameset in Raw Phosphate has the raw steel look of a phosphate finish. It is State's double butted chromoly hardtail frame, sold on its own for a custom trail build.
State draws it with a 65° head angle, a low top tube and a long front center around a 550mm suspension fork, so it stays stable when the trail gets rough and still turns quickly in tight corners. The fork is sold separately.
Key Features
- Trail geometry. Drawn around a 550mm axle to crown fork for a 65° head angle, a low top tube and a long front center.
- Double butted 4130 chromoly. Steel that takes trail chatter and hard hits, with 3 bottle mounts on the down tube.
- Dropper ready. A 31.6mm seat tube with internal routing for a dropper post.
- Threaded bottom bracket. A 73mm BSA shell that is quiet and easy to service.
- UDH dropout. The Universal Derailleur Hanger fits current drivetrains, and spare hangers are easy to find.
- Big tire room. Clears 29 x 2.6" or 27.5 x 3.0" tires.
Specifications
| Frame | Double butted 4130 chromoly steel |
|---|---|
| Fork | Not included. Geometry is drawn around a 550mm axle to crown suspension fork |
| Head tube | Tapered, ZS44 / ZS56, headset included |
| Head angle | 65° with a 550mm axle to crown fork |
| Bottom bracket | Threaded, 73mm BSA |
| Seat tube | 31.6mm, internal dropper routing |
| Derailleur hanger | Universal Derailleur Hanger (UDH) |
| Tire clearance | 29 x 2.6" or 27.5 x 3.0" |
| Bottle mounts | 3 on the down tube |
Sizes and Geometry
| Size | Rider height | Reach | Stack | Seat angle | Wheelbase |
|---|---|---|---|---|---|
| XS/S 38 cm | 5'1" to 5'5" | 420mm | 628mm | 74.5° | 1158mm |
| S/M 41 cm | 5'5" to 5'10" | 445mm | 637mm | 74.4° | 1188mm |
| M/L 43 cm | 5'10" to 6'1" | 465mm | 647mm | 74.4° | 1212mm |
| XL 46 cm | 6'1" to 6'5" | 490mm | 656mm | 74.4° | 1241mm |
Measured with a 550mm axle to crown fork, fully extended, and a 29 x 2.4" tire. Head angle 65°, bottom bracket height 316mm and trail 125mm on every size.
In the Box
- 4130 Trail frame
- Headset
- Front and rear thru axles
- Universal Derailleur Hanger
- Cable guides
- Quick release seatpost clamp
Questions
Does it come with a fork?
No. The frame comes with the headset, thru axles, UDH, cable guides and seatpost clamp. State drew the geometry around the RockShox Psylo Silver RC (130mm travel, 35mm stanchions, 550mm axle to crown), which is sold on its own.
Can it run a rigid fork?
Yes, and it changes the bike. With a rigid fork of 492 to 495mm axle to crown, State's numbers show the head angle steepening to about 67.5°, stack dropping about 20mm, reach growing about 28mm and the bottom bracket sitting about 19mm lower. It steers quicker and rides longer, so State points riders between sizes to the smaller one.
What is needed to finish the build?
A fork, wheels and tires, a drivetrain and crankset for a 73mm BSA shell, brakes, handlebar, stem, a 31.6mm seatpost or dropper, saddle and pedals.