1996 4x4 Tacoma Tires

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Thread: 1996 4x4 Tacoma Tires

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    Default tire sizes

    We are purchasing the 1996 Tacoma and it has P225/R75/15 on it now, we want to put P265/R75/15 on it. Is there a computer chip in the engine that needs to be recalibrated, to accomodate the new size? Can this be done? Someone told us that we need to do this. Is it hard to do?

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    Going from 225 to 275's shouldn't make much of a difference to the speedo/odometer. You could always go with a TruSpeed Recalibrator.
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    Well first off going from 225/75 15 to 265 75 15 is a pretty big jump in tire size. Basically you go from a 28.3 inch tire to a 30.6 inch tire thats a difference of 8.4%. Now most people will tell you not to exceed an increase of more than roughly 3% with stock drivetrain and components or you'll start to feel the negative effects. Can it be done. Yes. Will it cost money, Oh yeah. I'm assuming with that stock tire size the truck is a 5 bolt 2wd as opposed to the 6 bolt on 4x4 and prerunner models. So first you'll have to consider if the tire will even fit at stock height. The 265 75 15 is quite a bit taller and much wider than the stock tire and without a significant lift it will not fit. The tire will most likely rub on the inner fenders, and maybe the control arm when the suspension is compressed or when turning.
    Next thing you need to consider is new gears. Do to the increase in tire size you'll need to consider lower gears maybe 4.10's or your truck will feel as if you have lost power. This is even more important in 4 cylinder truck where power loss is felt greater than say in a V6. Think of it like a ten speed bike, and say you're the engine. You can have all the power in the world but if you're in a really high gear pedaling down the street your legs may be moving really fast but the bike will just creep along, until you pick a higher gear that is and then your speed will increase. Gears can also be pricy. Now you don't need new gears but it certainly corrects a lot of issues when you increase tire size as significant as you're talking about. It'll keep the trucks performance as far as speed and power closer to stock performance, and it'll correct your speedo because it'll be out.
    After that brakes. You may want to consider bigger brakes, or stopping distances will be increased. The tacoma mini trucks have smaller brakes than the prerunner and 4wd trucks.
    So all in all a must is the lift, which I hear are few and far in between for the 5 bolt Tacoma's as their suspension setup is much different from that of the 4wd and prerunner Tacoma's. I wish it were as easy as bolting in a used 4wd suspension but it's not. The 5 bolts have considerable differences from their bigger brothers the prerunner and 4wd models. A lift for the 5 bolt Tacoma's will run you at least a few thousand. Then gears possibly, a few more hundred, maybe brakes a few more hundred, and labour for who ever is going to do the install work. I've seen it done before but for the time, effort and money required to do it you'd be better off going and buying prerunner 2wd Tacoma or a 4wd Tacoma.

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    Quote Originally Posted by tbrown78
    Well first off going from 225/75 15 to 265 75 15 is a pretty big jump in tire size. Basically you go from a 28.3 inch tire to a 30.6 inch tire thats a difference of 8.4%. Now most people will tell you not to exceed an increase of more than roughly 3% with stock drivetrain and components or you'll start to feel the negative effects. Can it be done. Yes. Will it cost money, Oh yeah. I'm assuming with that stock tire size the truck is a 5 bolt 2wd as opposed to the 6 bolt on 4x4 and prerunner models. So first you'll have to consider if the tire will even fit at stock height. The 265 75 15 is quite a bit taller and much wider than the stock tire and without a significant lift it will not fit. The tire will most likely rub on the inner fenders, and maybe the control arm when the suspension is compressed or when turning.
    Next thing you need to consider is new gears. Do to the increase in tire size you'll need to consider lower gears maybe 4.10's or your truck will feel as if you have lost power. This is even more important in 4 cylinder truck where power loss is felt greater than say in a V6. Think of it like a ten speed bike, and say you're the engine. You can have all the power in the world but if you're in a really high gear pedaling down the street your legs may be moving really fast but the bike will just creep along, until you pick a higher gear that is and then your speed will increase. Gears can also be pricy. Now you don't need new gears but it certainly corrects a lot of issues when you increase tire size as significant as you're talking about. It'll keep the trucks performance as far as speed and power closer to stock performance, and it'll correct your speedo because it'll be out.
    After that brakes. You may want to consider bigger brakes, or stopping distances will be increased. The tacoma mini trucks have smaller brakes than the prerunner and 4wd trucks.
    So all in all a must is the lift, which I hear are few and far in between for the 5 bolt Tacoma's as their suspension setup is much different from that of the 4wd and prerunner Tacoma's. I wish it were as easy as bolting in a used 4wd suspension but it's not. The 5 bolts have considerable differences from their bigger brothers the prerunner and 4wd models. A lift for the 5 bolt Tacoma's will run you at least a few thousand. Then gears possibly, a few more hundred, maybe brakes a few more hundred, and labour for who ever is going to do the install work. I've seen it done before but for the time, effort and money required to do it you'd be better off going and buying prerunner 2wd Tacoma or a 4wd Tacoma.
    Yep, I agree. It would be cheaper and easier to just get a different truck...
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    Default 1996 4x4 Tacoma Tires

    I purchased a truck that came with stock P225/R70/R15 . When I bought the truck it had P235/R75/R15 on the truck. I noticed that the newer trucks have the P265/R75/R15 on them. I know that the truck has the proper space to put the tires on the truck. I have been told that there is a computer chip in the engine that you can have reprogramed at the Toyota dealership to change everything so the transmition and whatever else needs to be changed runs correctly with the bigger tires. Has anyone done something like this or is this information that I have been given false. I would like to put the P265's on if everything would work out. This truck has an automatic transmition and a V6 engine.

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    First you shouldn't repost the same thing you posted last night, just an FYI. Now if you have a base 96 4x4 you can fit 265/75 15s without fitment problems. As for the computer chip question changing it will not correct anything except maybe your speedo readout. You don't need to do anything to your ECU to change tire size. Be warned though that if you do change tire size, you will feel a dramatic loss of power without changing gears. While there are many electronics in your truck it is still mainly a mechanical machine. Your wheels are essentially the final gear in the transfer of power from the engine to the road, and no amount of playing with the electronics changes that. Changing tire size changes gear ratio's. Your trucks gears are different from those 96 models that came with 31" tires. Your trucks gear ratio is unfortunatly 3.58 with your stock tires, the trucks that came with 31's have different lower 4.10 gears. Now if you put on 31's your trucks gear ratio will be even higher than 3.58 not sure of the math right this second but I'm guessing in the 3.0 region. That's real bad, it'll feel like your driving a golf cart. If you change the stock gears to 4.10 the power will return. So don't worry about the computer you don't have to do anything to it, and if you can live with the loss of power without regearing do it. As for your leaf spring question from your third post on this truck email or go to the wheelers offroad website they can hook you up.

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    Quote Originally Posted by tbrown78
    First you shouldn't repost the same thing you posted last night, just an FYI. Now if you have a base 96 4x4 you can fit 265/75 15s without fitment problems. As for the computer chip question changing it will not correct anything except maybe your speedo readout. You don't need to do anything to your ECU to change tire size. Be warned though that if you do change tire size, you will feel a dramatic loss of power without changing gears. While there are many electronics in your truck it is still mainly a mechanical machine. Your wheels are essentially the final gear in the transfer of power from the engine to the road, and no amount of playing with the electronics changes that. Changing tire size changes gear ratio's. Your trucks gears are different from those 96 models that came with 31" tires. Your trucks gear ratio is unfortunatly 3.58 with your stock tires, the trucks that came with 31's have different lower 4.10 gears. Now if you put on 31's your trucks gear ratio will be even higher than 3.58 not sure of the math right this second but I'm guessing in the 3.0 region. That's real bad, it'll feel like your driving a golf cart. If you change the stock gears to 4.10 the power will return. So don't worry about the computer you don't have to do anything to it, and if you can live with the loss of power without regearing do it. As for your leaf spring question from your third post on this truck email or go to the wheelers offroad website they can hook you up.
    sorry about the re-post I wanted to clarify that the truck was a 4x4. I didn't know if anyone would see it burried in the other thread.

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    Threads have been merged... .
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