In this roof crush challenge, what specific product features allowed the Xiaomi HyperEngine N90 Max to withstand 17 tons of top-down pressure?
First, it benefits from the high-strength materials of the N90 Max's armored cage body, where high-strength steel and aluminum alloy account for up to 90.4%, ensuring sufficiently high overall body strength. Sixteen applications of 2200MPa Xiaomi super-strong steel are used throughout the vehicle, further enhancing the strength of key positions in the occupant cabin.
There is also the high-strength body structure. The N90 Max is equipped with a 2200MPa "built-in roll cage," which embeds gas-expanded tubes made of 2200MPa Xiaomi super-strong steel from the A-pillar to the C-pillar over a length of 2510mm, effectively improving roof protection and A-pillar load-bearing capacity.
The N90 Max also features a one-piece hot-formed door ring. Compared to traditional door rings formed by welding multiple stamped parts together, its structure is continuous and complete, significantly increasing overall strength while reducing the risk of weld failure. Its dimensions reach 3289mm in length and 1556mm in height, covering the A, B, C, and D pillars and spanning the first, second, and third rows, effectively enhancing side and roof protection for the occupant cabin.