You could have 8 different and fixed torque numbers. Each number will always land on a specific spot.
You could then make a weighted array with indexes that link to the specified torques, like [1,1,1,1,2,2,2,2,3,3,3,4,4,4,5,5,6,6,7,8] and select a random index from this array.
Since the torque is always the same, and the landing spot of the torques are always the same, your weight array (or probability table) is the thing that will determine the landing spot.
You could also increase the number of possible torques to give a more random feel to the process.
All said and done, this is probably a bad thing to do. It is better to always be clear about the mechanics with your player unless you are dealing with some sort of trap or puzzle piece.
If you are dealing with gambling applications it is even worse, and not disclosing this to the public could be considered a rigged game and could result in felony charges depending on local legislation.
Just be mindful of when and how you use a mechanic that is counter-intuitive to the player, even more if there is monetization in the process. Remember that in some countries lootboxes may soon be gambling, so the market and the law are changing.
This might be way off of your purpose, but it never hurts to inform due to the nature and design of the wheel of fortune.
Cheers!