https://www.orionsarm.com/eg-article/59b109574cb45

...The polar crust is very thin compared to the rest of the world and experiences much more volcanism and geothermal activity. Tectonic plates drifting hubward would shrink in size, usually becoming islands, and grow heading rimward due to the differences between the inner and outer radii. Plates moving rimward would rift and plates moving vice-versa would fold, resulting in mountainous landscapes in the hub. Because of the rapid rotation the surface gravity on the Torus is non-uniform, with the polar regions being 1.1 g, the rim 0.7 g, and the hub 0.8 g, so that the mountains are higher (on average) than those on Earth.

The iconic shape of the Torus is achieved through its ultra-fast rotational speed, which allows the centrifugal force to balance with its gravity. The high rotation deforms the body of the world, making it oval-shaped with a sharper edge in the hub along with making it oblate. The rotation also causes fast winds in many latitudes, ringed zonal climates, and a weak distribution of heat from the large inner radius, which leads to dramatic changes in temperature in different regions. An intense Coriolis effect is prevalent on The Torus that spawns frequent, but small cyclone and storm systems usually near the poles. The regions with lower gravity would experience higher cloud height and vice-versa for regions with higher gravity.

The days are very brief, only lasting 3.5 hours, and at the rim they resemble the days on Old Earth, but much shorter. However, due to The Torus's tilt, the poles experience extended periods of day or night for the summer and winter months. The fast rotation results in the home star already rising past the atmosphere on the other side of the Torus that produces a Fall dusk and Spring sunrise showing off very short-lived, vibrant colors. The nights on the hub could be as light as a cloudy day from the reflection of light from the other side of the hub. The hub would also be fairly temperate with Fall and Spring shrouding parts of it in dark during the winter and summer months.