State Bicycle Co. 4130 All-Road Geometry & Bikepacking Bag Fit2026
The only link we hold for this frame is the geometry document itself, which is not a page you can buy from.
State Bicycle Co. 4130 All-Road frame geometry, drawn to scale
Every tube angle and length below is from the published chart, not an illustration. The front triangle area is the number that decides which frame bags fit — and it changes a lot across sizes.
What this frame gives a loaded bike
Chainstay length is the gap between the seat tube and the rear axle, which a rack, panniers and your heels all have to share. Bottom bracket drop is how far the cranks sit below the axles. Both are compared against the median across every current frame we hold.
450mm chainstays, 15mm longer than the 435mm median across the 65 current frames here. Bottom bracket drop 75mm, 5mm more than the 70mm median. The fork publishes cargo mounts, and the frame publishes bottle or accessory mounts. State Bicycle Co. states the frame does not take a rear rack. Widest published tire 60mm on 650b / 27.5in, 55mm on 700c / 29in. It takes a dropper post.
Every figure above is the manufacturer's, computed against the rest of the database. It says what the frame allows, not how it feels — nobody here has ridden it.
What it can carry
Mount provision and clearance, as State Bicycle Co. publishes it.
State Bicycle Co.'s wording: “Frame 700c up to 55mm; 650b up to 60mm”
Geometry
All figures in millimeters except angles. Effective top tube and seat tube are the two that decide frame bag fit.
| Size | Eff. top tube | Seat tube | Standover | Head tube | Stack | Reach | Chainstay | Wheelbase | BB drop | Head angle | Seat angle |
|---|---|---|---|---|---|---|---|---|---|---|---|
| XS | 510 | 430 | 772 | 125 | 577.7 | 355.2 | 450 | 1030 | 75 | 70.5° | 75° |
| S | 535 | 470 | 799 | 145 | 597.7 | 369 | 450 | 1045.8 | 75 | 71° | 74.5° |
| M | 550 | 510 | 826 | 165 | 619.6 | 367 | 450 | 1045.1 | 75 | 71.5° | 73.5° |
| L | 575 | 550 | 854 | 185 | 639 | 380 | 450 | 1064 | 75 | 71.5° | 73° |
Bottom bracket height
Roughly 300mm off the ground. State Bicycle Co. doesn't publish this directly — we derive it from their BB drop and a typical 75cm tire diameter, so treat it as indicative rather than exact. It changes with the tire you fit. Lower means more stable and more pedal strikes; higher means the opposite.
Source — State Bicycle Co.'s own geometry chart: https://cdn.shopify.com/s/files/1/0232/3305/files/072026-4130-All-Road-Dropbars-SizeSpec.pdf?v=1785538037 — checked 2026-08-18. A dash means the figure isn't published; we leave it blank rather than estimate.
Note: Geometry from State’s own size-spec PDF (updated 2 June 2026); the chart gives some rows in cm, converted here. Standover is the 700c figure of the published 700/650 split. Dropper: “Dropper Post Ready — Internal routing already in place. Add a dropper whenever you're ready.”. Full clearance table: FRAME CLEARANCE: Frame 700c (29”): Up to 55mm (2.2”) 650b (27.5”): Up to 60mm (2.4”) Standard Chromoly Fork 700c (29”): Up to 55mm (2.2”) 650b (27.5”): Up to 60mm (2.4”) Monster Fork (Carbon) 700c (29”): Up to 55mm (2.2”) 650b (27.5”): Up to 55mm (2.2”)
How the 4130 All-Road compares
Against the frames people actually cross-shop it with — both charts held together, on the specs that decide what the bike carries.
Questions people ask about this frame
Answered from what State Bicycle Co. publish. Where they publish nothing, that is what it says.
Does the 4130 All-Road take fork cargo cages?
Not published. State Bicycle Co. don't state any fork mount provision for this frame. That isn't the same as it having none, and we won't guess from a photo.
What is the widest tyre the 4130 All-Road takes?
60mm on 650b / 27.5in. Across the wheel sizes State Bicycle Co. publish: 55mm on 700c / 29in, 60mm on 650b / 27.5in. Those are frame figures, not the fork's — forks are routinely cut for more rubber than the rear triangle.
Will a seat pack work on the 4130 All-Road?
The dropper is the problem, not the pack. This frame publishes dropper routing, and a dropper and a seat pack want the same space — fitting one rules out almost every strap-on seat pack and leaves rail-mounted bags at a fraction of the volume. Run a rack or a saddle-rail bag if you want both.
Which frame bags fit
Every frame bag we track, checked against this frame's published geometry. Pick your size.
Checking 16 frame bags against a 550mm effective top tube and 510mm seat tube. 16 fit.
Frame bag fit is calculated from State Bicycle Co.'s published geometry, so it's as reliable as their chart. Seat packs and handlebar rolls depend on your exposed seatpost and bar width, which no geometry table lists — the bag finder covers those once you add your own measurements.