Genesis Croix de Fer Geometry & Bikepacking Bag Fit2026
The same page we read this geometry from. We don't hold live pricing or stock for frames, so check both there.
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Genesis Croix de Fer 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.
435mm chainstays, about the median for the 65 current frames here. Bottom bracket drop 73mm, close to the 70mm median. The fork publishes cargo mounts, and the frame publishes bottle or accessory mounts. A rear rack bolts straight on. Widest published tire 47mm 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 Genesis publishes it.
Genesis's wording: “With maximum tyre clearance of 700c x 47mm, the Croix De Fer can be adapted to suit a wide range of conditions.”
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 | 553 | 470 | 741 | 100 | 552 | 395 | 435 | 1042 | 73 | 71° | 74° |
| SM | 557 | 490 | 759 | 115 | 566 | 395 | 435 | 1046 | 73 | 71° | 74° |
| MD | 558 | 530 | 785 | 135 | 585 | 385 | 435 | 1043 | 73 | 71° | 73.5° |
| LG | 574 | 560 | 809 | 155 | 604 | 395 | 435 | 1059 | 73 | 71° | 73.5° |
| XL | 589 | 590 | 833 | 175 | 623 | 405 | 435 | 1076 | 73 | 71° | 73.5° |
Bottom bracket height
Roughly 302mm off the ground. Genesis 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 — Genesis's own geometry chart: https://www.genesisbikes.co.uk/product/genesis-croix-de-fer-30-vargn10910/VARGN10910/GN10910LG — checked 2026-08-18. A dash means the figure isn't published; we leave it blank rather than estimate.
Note: Geometry is the Genesis CDF drop-bar chart published for the 2026 Croix de Fer range; values are already in millimetres and degrees. Price is GBP. Genesis on droppers: “all models can accept a dropper seat post”. Reach on MD is 10mm shorter than on SM; every size reconciles reach, stack, seat angle and effective top tube to within 1mm, so that is how Genesis draws the size run rather than a transcription error. Price is GBP.
How the Croix de Fer 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 Genesis publish. Where they publish nothing, that is what it says.
Does the Croix de Fer take fork cargo cages?
Yes. Genesis publish cargo-cage mounts on the fork, but the wording does not give a count we can stand behind, so we're not going to put a number on it.
What is the widest tyre the Croix de Fer takes?
47mm on 700c / 29in. That is the frame figure rather than the fork's, and it is what limits a loaded bike.
Will a seat pack work on the Croix de Fer?
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 558mm effective top tube and 530mm seat tube. 16 fit.
Frame bag fit is calculated from Genesis'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.