Tire and regear help

Hey guys, I know this question has been asked many times before but through all of my searching it was never completely answered. I have an 03 Tacoma double cab SR5 3.4 4x4 and I recently put on the King coilovers 0-3" and have them up at 1" right now until I get the rear suspension redone. My question is, once I get that rear suspension installed and get the bigger tires on, will I need to regear my truck? I am looking to put the biggest tire on that I can that won't affect my gas mileage too much. I have always had the BFG AT's and plan to get another set but 285/75/16. I have trimmed already so I may go slightly bigger if it is worth it, but I don't want to regear if I don't have to. Also, for a lot of street driving and a frequent amount of offroading, should I stick with the AT's or move on to the KM2s? Keep in mind gas mileage differences. Thanks for the help.

 

Well you can say goodbye to gas mileage with 285 in the first place. if you want better power with 285s put 4:56 gears in there. help get the power and mpg closer to stock. if you go bigger than 285s put 4:88 gears in it. 285s will drop your mpg and to do it right get 4:56 gears. Any bigger than 285s i think would be impractical if your wanting good mpg and use it as you dd.

 

From what I hear its more of a pain in the ass if you dont regear. But if you are going with a 285 I wouldnt worry too much about it. It might feel a little sluggish compared to stock tires but thats about it. im sure someone with more experience with it will chime in.

Bump

 

Oh and as for the km2 (which i have) great tire both on and off road. i am almost at 30,000 miles on them. still looking good. be replacing them though with 255/85 cooper a/t

 

There is a group buy going on for gears too If you want to go with the 285's and get close to stock gearing and power back.

EDIT: I spoke too soon didnt realize you were 4x4. Im sure you can deal with it but it will definitely not be near stock for anything with the bigger tires.

 

On the same topic....if the truck was supercharged would you still need to regear for MPG reasons?

 

What about the road noise on those KM2s? Is it a pretty noticeable difference?

 

I will look into the group buy thank you. I would like to keep everything as close to stock as possible in terms of gears so I do not ruin my engine. I have over 225k miles now and would like to continue treating it right. Will I see a change in the way the speedometer reads or my RPMs I should say? Do you have any idea how much I am looking at to regear labor wise unless it is easy enough to do myself?

 

i would say not so easy but i would like to knoiw also how easy or hard it is....i think around $500 for someone todo it around my area.

 

At first they are quiet but as of now mine scream at around 65-70 mph on certian paved surfaces.