Mounting panniers to a full-suspension frame is the genuinely fiddly bit here — the Amflow PX has no rack mounts on the seatstays, and you don't want anything bolted to the swingarm that'll bind as the suspension cycles through its 150mm. So let me set expectations before pointing at kit.
The Aorere (Tailfin's full-suss-friendly setup) works because it's a seatpost-and-axle-mounted arch — the load is carried by the frame's sprung mass, not the moving rear triangle. That's the principle you want to copy on a budget, rather than a cheap rack that clamps to the stays.
Lower-cost options that follow the same logic:
• Seatpost-clamp rack (Topeak MTX BeamRack, ~£40–60, or similar). Mounts entirely to the seatpost, floats above the rear wheel, never touches the swingarm. Pair it with Topeak's MTX quick-release panniers. Caveat: your dropper post is the limiting factor — these clamp to the post, so you lose dropper function while it's fitted, and there's a weight limit (usually ~9kg total). Fine for commuting kit; not for a weekly shop.
• Axle-mounted rack (Old Man Mountain Divide or Elkhorn, ~£140–180). Bolts to the rear axle and braces forward — designed specifically for bikes with no mounts, including full-sus. Pricier than the seatpost option but far more load-stable and keeps your dropper free. This is the closest "Aorere principle, less money" answer.
• Frame/saddle-rail bag instead of panniers — if you can fit your commute load into a large saddlebag or a fork/frame bag, you sidestep the rack problem entirely. Cheaper and lighter, just less capacity.
One thing to check on the PX specifically: it's a mullet (29F/27.5R), so a seatpost rack sits a touch lower over the smaller rear wheel — measure your heel-to-pannier clearance before committing, as crank-arm-to-pannier strike is the usual annoyance.
I'd steer you toward the Old Man Mountain axle rack as the best balance: it's built for exactly this "no mounts, suspension frame" scenario, costs a fraction of the Tailfin, and won't fight your dropper. The seatpost rack is the genuinely cheap route if you can live without the dropper on commutes.
I don't have a verified PX-specific fitment confirmation for either, so worth a quick measure of your axle standard (likely 12x148 Boost) before ordering.
If you tell me your rough commute load and whether you want to keep the dropper working, I'll narrow it to one.
