Tire size calculator question

I'm trying to figure out what gears to get for my Tacoma, I've been looking at the tire size calculator to get some context for how each increase in ratio will change things. I realized though that the rpm chart at the bottom doesn't say if it is for the 4 cylinder (what I have) or the v6, or which transmission.

Does anybody know its parameters?

A guy at justdifferentials suggested I go for 4.88, but I'm worried that's too low. It is my winter dd and does spend a fair bit of time on the highway. As it is, I mainly want second gear to not bog below 13mph and I want a bit more power in 5th gear. Off road power in 4 low has never been lacking. I'm running 32" bfg at/kos with no plans to go larger.

Any suggestions?

 

Pretty sure you have 4.11, 4.88 is a larger change than the 32s are from stock.

 

The gearing also sucked with stock tires

 

Do you use dedicated winter tires?

 

Naw, just my bfg at/KO 235/85R16.

 

Then maybe 4.88 is what you want.

 

Assuming you started with 245/75-16 and now have 235/85-16 that a 4.1% increase.

Multiply 4.11 x 1.041 gets 4.28 gears.

If you think 4.11 was too high then maybe a 4.54 would suffice.