How long does the wheel of montony spin on neopets?

The Wheel of Monotony on Neopets spins for 6 hours. After that, it resets and you can spin it again.

Keep in mind that the Wheel of Monotony only appears on the site at random intervals, so there is no set time for when it will be available. You can check the "What's New" section on the Neopets homepage to see if it's currently active.