All-City Space Horse Geometry & Bikepacking Bag Fit2026
Discontinued. All-City no longer lists the Space Horse. It's here because these frames stay in circulation second-hand and the geometry is still what you need to pick bags — but you won't find one new.
All-City Space Horse 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.
420-445mm chainstays, about the median for the 65 current frames here. Bottom bracket drop 58-75mm, close to the 70mm median. All-City publishes no fork cargo mounts, and the frame publishes up to 2 bottle or accessory positions. A rear rack bolts straight on. Widest published tire 47mm on 650b / 27.5in, 45mm on 700c / 29in.
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 All-City publishes it.
All-City's wording: “Tire Clearance Frame + 43~46cm: 650b x 47mm || 49~61mm: 700c x 45mm and 650b x 47mm”
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 43cm (650b) | 495 | 420 | 725.3 | 95 | 493 | 363 | 420 | 989.4 | 58 | 70° | 75° |
| 46cm (650b) | 515 | 450 | 747.2 | 105 | 504 | 375 | 420 | 1001.1 | 58 | 70.5° | 74.5° |
| 49cm | 530 | 480 | 779 | 110 | 545 | 376 | 435 | 1021.1 | 75 | 71° | 74.2° |
| 52cm | 545 | 510 | 802 | 125 | 559 | 380 | 440 | 1034.6 | 75 | 71° | 73.5° |
| 55cm | 560 | 540 | 831 | 150 | 589 | 380 | 440 | 1029.9 | 75 | 72° | 73° |
| 58cm | 580 | 570 | 857.3 | 175 | 612 | 387 | 445 | 1049.6 | 75 | 72° | 72.5° |
| 61cm | 610 | 600 | 883.1 | 200 | 636 | 403 | 445 | 1073.7 | 75 | 72° | 72° |
Bottom bracket height
Roughly 300–317mm off the ground. All-City 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 — All-City's own geometry chart: https://allcitycycles.com/bikes/space_horse_grx — checked 2026-08-18. A dash means the figure isn't published; we leave it blank rather than estimate.
Note: All-City’s page is still up but QBP announced no new All-City development past model year 2024, so this is listed as discontinued. Wheel size is set by frame size: 43 and 46cm are 650b, 49cm and up take either. The fork’s threaded mounts are rack mounts, not cargo-cage mounts, so they are recorded under rack mounts and the fork cargo field is left empty. Geometry is measured on a 700c x 38mm tire at 706mm diameter; standover is measured 50mm forward of the BB centre.
Questions people ask about this frame
Answered from what All-City publish. Where they publish nothing, that is what it says.
Does the Space Horse take fork cargo cages?
Not published. All-City 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 Space Horse takes?
47mm on 650b / 27.5in. Across the wheel sizes All-City publish: 45mm on 700c / 29in, 47mm 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 Space Horse?
Not published. All-City don't state dropper compatibility for this frame, so we can't tell you whether a dropper would compete with a seat pack on it.
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 545mm effective top tube and 510mm seat tube. 16 fit.
Frame bag fit is calculated from All-City'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.