23Zero Onyx Triple X 1450 vs Horntools Themis 140

The 23Zero Onyx Triple X 1450 and the Horntools Themis 140 are both hardshell tents in the same part of the market, which makes them a genuine head-to-head rather than a comparison across categories. 23Zero and Horntools take noticeably different approaches to the same problem.

By the numbers, the 23Zero Onyx Triple X 1450 brings 98 kg, 2.78 m² of floor and sleeps 2. The Horntools Themis 140 counters with 70 kg, 2.97 m² of floor, 100 cm of headroom and sleeps 2.

The Themis 140 is 28 kg lighter at 70 kg against 98 kg, which on a factory roof rated for 68 to 75 kg is often the difference between a legal fit and a rack upgrade. Floor area is close to identical at 2.78 m² and 2.97 m², so neither wins on sleeping room. Their list prices are within a few percent of each other, so price is unlikely to decide this one.

They open differently: the Onyx Triple X 1450 is a clamshell and the Themis 140 a pop-up. That is not cosmetic — it decides whether headroom is even across the tent or tapers towards one end, and how much of the roof the tent occupies when closed. The Onyx Triple X 1450 uses oxide-coated aluminium extrusions with a honeycomb base; the Themis 140 uses ABS (acrylonitrile butadiene styrene). Canvas differs too: 320 gsm canvas with Light Suppression Technology (LST) against cotton, linen, polyester with PU coating (water column 2000 mm). Closed, the Onyx Triple X 1450 sits 8 cm lower on the roof — 22 cm against 30 cm — which is drag you carry on every mile you are not camping.