so here's the situation, girlfriends dad has some brand new 35x12.5x15 mickey thompson baja mtz's that he is willing to give me for free, (long story) but I have the upgraded brakes (16" rim size) and so I am wondering what all I need to change to fit a 15" rim on the rig, if anyone knows beyong new rotors please let me know, and do I need to change the rear drums? If so is there a disc conversion kit for 15" rotors & callipers?

 

You really shouldn't downgrade on your brakes, especially considering you want to run a considerably heavier tire. You'd just be asking for a wreck

 

If i convert to drilled rotors and ceramic brake pads, combined with a disc conversion in the back i think i will be fine. not to mention i don't drive it like a race car I only go above 70 once in a blue moon.

 

Dont waste your time and money downgrading to the smaller brakes.

Stick with what you have until you come to a better deal.

The smaller brakes will not only cost money, it will DECREASE braking power and INCREASE stopping distance.

Never ever sacrifice stopping ability for "bling bling"

 

Maybe if you weren't changing your tire size, you might be ok with downgrading on the brakes. But you will be adding a considerable amount of weight with a 35" tire. But if you're willing to risk your and your passengers safety just to look cool, go for it.

Do you even have the proper amount of lift to run 35's? or plan on re-gearing for the power loss?

 

I have a 5" lift and waiting for a better deal would be retarded... all of you know very well these tires are 250$ a piece at least so its over a grand in tires and about 500$ for the rims.... $1500 in rims and tires you don't come accross all the time. (for free that is)

 

So you want to downgrade your brakes just because you got a good deal?

Have you even tried to fit them on? They might work, since they are aftermarket rims.

And if not, why not just sell the setup, and get the 16" wheels? Even if you have to pay a little bit, its still a screaming deal.

 

Well, can you you sell those rims and purchase something that will allow you to upgrade your brakes and not downgrade them?

 

Excuse me but waiting for a better would not be retarded. You are doing the most worthless thing that I have ever heard on a 4runner. We are upgrading our 16" rim brakes for Tundra brakes! Why would you even want to go the other way? Just sell that worthless stuff to someone with a jeep, and buy a 16" version of the same thing.

How do you even know that the bolt pattern is the same?????????? Did it come off of an older Toy? Why are you even trying to use these? With 35" tires you will have to re-gear anyways. Even if that setup fit the bolt pattern with your smaller brakes, you would still have to use some sort of wheel spacer unless your backspacing is out far enough. Just sell off that set of tires and wheels and get something worth your time.

 

Your brake balance should be all screwed up too if you go to a 15" brake, and keep in mind it will cost $$. On top of the $$ it costs to do the conversion, be sure to factor in your insurance deductible for when you rear end somebody and the $$$ for gas with stock gearing and 35s. Honestly, you have to stand back and look at the whole picture to determine if something is a good deal. Hell, someone could give me a free 300 hp twin turbo supra motor for my 4runner and it wouldn't be a good deal for me if you factored the cost of the install. Just try and think this one through.

 

So get the tires and sell them for a little less than retail. Use that money to buy a set that would be better fitted to your 4Runner.

Downgrading your brakes when increasing weight is truly a terrible and unsafe. Maybe you should think about your girlfriend as a passenger or the other people you'll be putting in danger by downgrading your brakes/ increasing your needed stopping distance.

We are only trying to keep you from making your vehicle unnecessarily unsafe. Why don't you go ask a local mechanic what he thinks about your plan.

 

$250 per tire huh?

How much ya rekon it would cost for a rear disk conversion which would include the brackets, calipers, pads, rotors, and new front rotors, calipers, pads?

 

Dude, you may be in luck. Try grinding down the calipers on the outside. I've heard this works. I'd just be careful not to go too far. Going to have to get your 15" rims and do some clearence checks.

 

Free is never "FREE". Listen to what the guys on here are telling you. Your 4runner was designed for the 16" wheels, the brakes were designed for 16" wheels. The gearing was designed for a specific size tire, 265-70R-16 (check your owners manual).
When you start changing those parameters, there will be trade offs. Some are not going to the least bit SAFE, for your or your truck. You at least had the common sense to come here and ask BEFORE you undertook this project. Yes you are being offered a GREAT deal on tires and wheels, but if they are not the right base size to begin with then down grading your brake set up even if you use factory parts is aVERY BAD idea, no matter how good the deal may seem to be. Getting the tires and wheels for "free" isn't such a good deal if the resulting modifications cost you thousands of dollars and maybe your life. Do yourself a huge favor, you came here to ask for opinions of the how and cost to do this conversion, take the advice your reading here, evaluate it and then make your decision, but if you chose to ignore the advice, be ready to accept the consequences of your actions.

If it was me, I would ask the G/F father about selling them and using the money to purchase what you NEED to accomplish the same thing but with a wheel size that is proper for your 4runner. Then do the Tundra brake UPGRADE to the larger calipers/pads and thicker rotor. That one is a simple bolt on and IMPROVED braking is the result. Good luck