Ritchey OutbackGeometry & Bikepacking Bag Fit2025
What it can carry
Mount provision and clearance, as Ritchey publishes it.
Ritchey's wording: “Wheel and tire compatibility 700 x 48mm or 650 x 2.0in (depending on tire/rim manufacturer)”
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 | 526 | 410 | 740 | 115 | 532 | 373 | 453 | 1047 | 70 | 69.5° | 74° |
| S | 541 | 435 | 759 | 130 | 548 | 378 | 453 | 1053 | 70 | 70° | 73.5° |
| M | 557 | 460 | 782 | 150 | 567 | 383 | 453 | 1061 | 68 | 70.5° | 73° |
| L | 570 | 490 | 806 | 170 | 587 | 390 | 453 | 1070 | 68 | 71° | 73° |
| XL | 581 | 525 | 832 | 190 | 606 | 395 | 453 | 1081 | 68 | 71° | 73° |
| XXL | 595 | 555 | 862 | 220 | 637 | 400 | 453 | 1091 | 68 | 71.5° | 73° |
Bottom bracket height
Roughly 305–307mm off the ground. Ritcheydoesn'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 — Ritchey's own geometry chart: https://ritcheylogic.com/bike/frames/outback-frameset — checked 2026-08-18. A dash means the figure isn't published; we leave it blank rather than estimate.
Note: Manufacturer page description identifies this edition as the 2025 Outback. Manufacturer page does not publish a direct price. Geometry lengths are published in millimetres; angles are published in degrees.
Which frame bags fit
Every frame bag we track, checked against this frame's published geometry. Pick your size.
Checking 19 frame bags against a 570mm effective top tube and 490mm seat tube. 19 fit.
Frame bag fit is calculated from Ritchey'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.