Does anyone change their gear ratios with larger tires?

I was looking at a really nice '09 Taco 4WD DC (presumably 6 cyl) on TW; the owner had installed lift and 285's. Nothing was mentioned about installing lower gears to compensate for the bigger tires. I want to install 265's on my '10 reg cab 4WD 4CYL man trans (4:10 stock gears) and want to know if any owners have done any gear changes when installing larger tires. I could probably look up the recommended ratio but would like to hear from others who may have already done this. All replies encouraged, thanks in advance!

 

I have a 2WD 5lug with 235/75R16's around 3" taller than the factory tires I would look into a Hypertech n-Line Speedometer Calibrator Module but to fully correct the gear ratios you would have to change your ring and pinion.

 

People do it a lot.

However - it's an expensive process (installation & parts). If its not done right, could destroy things prematurely. In other words - the installation isn't something a backyard mechanic can do hap-hazardly.

Generally - I wouldn't do gears unless you need to move up a good amount (say for instance 4.88's) or you plan on putting even bigger tires on in the future OR want to install a locker.