ok thaxs Bama..
I guess I am going with the 231mm...now are rotors the same size for both type of calipers???

 

nope. the 16's on the runners have different rotors and calipers than the 15" runners.

 

I didn't know the Tundra ever came with 15" rims.
If they did then as Bamachem said, they would definately have different rotors too.

I wonder if those are the larger calipers they added for the TSB or just a change from model years.

 

could i get the tundra rotors that came with the 15 inch rims for my pickup?

 

That might be hard to do. Since disc brakes require more pressure to work just as effectively as drums. You will actually loose some braking power to the rear since the rear system has the pressure calibrated for drums. Now i'm sure if you had a lof of time and money, that this conversion can be done effectively and right. Otherwise, if you simply do a direct bolt on drum to disc conversion, i dont really think you are accomplishing very much.

 

I don't know how much would it cost to do it really, really right,
but first thing that comes to my mind is a proportioning valve or valves,
depending on number of lines - they are not that expensive...

 

You only need one adjustable valve for the line going to the rear brakes.
If you don't put one in, you will be guaranteed to lock up the rears the first time you try them out.

 

will this work with ONLY with 2000 tundra calipers or newer 2003 tundra calipers too?

 

My brother has a 2003 tundra SR5 2WD that I'm 99% sure has 15" wheels. They're the fugly steel ones and NOT the alloys like on the TRD Tundras.

 

huh? i was asking if the 2003 tundra calipers will fit too? or does it have to be off of the 2000 tundra?

 

sorry, that was in response to an earlier post and not to you... I edited and added the quote...

 

no broblemo...

 

I'm not sure if it's that easy for the rear.
Read this post.

https://www.yotatech.com/forums/show...6&postcount=14

 

anyone know if this will work with 2003 tundra calipers?

 

mmmm this summer its lookin like tundra calipers painted black or red with a tundra solutions big brake upgrade to 17inch cross drilled and slotted rotors to slow down my new big wheels

 

I believe the 199mm were the calipers used on 2000-2002, in 03 they replaced them with 231mm. The 00-02 Tundras have alot of break problems (vibration) so a tsb was put out by Toyota replacing them with 231mm. I don't think the size matters on a 4runner as long as they fit without much shaving.

 

That's what she said!

 

What about the brake booster and master cylinder, do they need to be upgraded to the Tundra?

 

Nope,
The upgrade for the rotors and calipers was to prevent warping of the rotors. So if you wanted to replace your master cylinder to a Tundra's you could. But you dont have to in order for this mod to work.

 

That was because the rotors were undersized for the weight of the Tundra.
4Runners don't weigh as much so either of those should be an improvement over stock.