Switching from 11R 22.5 to 295/75R 22.5 Volvo VNL 670

Good afternoon, folks. I hope everyone is doing well out there.

So, I bought my 2nd truck. It's a 2012 Volvo VNL 670. The truck is a 10-speed, 475 hp, 3.55 rear ratio on 11R 22.5 tires. It runs like kitten, with a rebuilt engine and tranny. I'm trying to get used to the gear box because you can't feel or even hear the stick as you shift. I'm really happy with it and might even sell my Columbia. I don't know, we'll see. The drive tires are the only thing bugging me because there are like 3 different brands with different wear levels. That's not how I roll (pun intended). So, I'm thinking of getting a whole new set. The rims are steel, so I might switch to aluminum.

I might be able to save 3 grand in the short term by switching the rims and tires with my Columbia. The drives on my Columbia have less than 90,000 miles on them and look brand new practically. And the rims are aluminum. So, I'm wondering how this will affect the performance of the truck. How will the torque, rear ratio, fuel efficiency, tachometer, etc. all be affected? Will I need to do any software reprogramming since the Volvo's specs/parameters were based on the 11R tires? How about pulling power? I run a lot in the mountains, so this is also a concern.

Thank you all in advance for your advice.

 

I thought that the gear ratio would go down to like 3.32 because it would take less turn of the shaft to complete one turn of the wheel?

 

I just can't wrap my head around it. If it takes 3.55 turns of the shaft to turn the 11R once, wouldn't it take less turns to turn the 295 since it has a smaller diameter?