Tundra brake mod... ideas and questions

Took a couple measurements to determine the clearance between my Tundra calipers and the inside of my 16" wheels.

Looks to be about 3/8"...

SR5_caliper.jpg~original


The distance from the rotor to the inside of the wheel is just under 3" (looks like 2-7/8")...

SR5_rotor.jpg~original


So, the distance from the rotor face to the outer dimension of the Tundra caliper is 2.5". Since the hub of the rotor is 1-7/8" from the rotor face, the distance "A" in the chart above (caliper overhang from outer hub surface) is 5/8".

So, if the inside surface of your wheel is closer than 2.5" to the outer surface of the rotor face or closer than 5/8" to your hub face, the Tundra calipers won't fit w/o modification. Of course, that's the bare minimum, probably want another 1/4" clearance for good measure.

I went right past this and didn't see it. Time for new eyes I guess. Thanks, zcruiser - I tried to extrapolate, since your measurements are with the Tundra rotors and I think I'm going to be cutting my wheels - like it or not. From the outside of the stock rotor to the inside of the disc of the Pacer wheel is about 2¾" and clearance of the stock caliper to the inside of the wheel at the top corner is barely 1/8", so "anything" wider isn't going to fit.

Is it possible to trim the outer edge of the caliper to help with clearance ??

The aluminum in the disc of the wheel in the caliper area is 15/16" thick, so there should be plenty of metal to cut and still be safe. I went to a local machine shop today to see if they can do the work and they referred me to an apparently well-known wheel maker named "Jongbloed" (pronounced Young Blood) who has a shop out by the airport.

Shop's there but he wasn't, so will keep trying. My rotors are badly warped and I want to get going on this pretty soon.

Thanks again

Lar.
 
Last edited:
Just did the upgrade on my 2000 Limited with the 5-spoke. NO grinding of the wheels or calipers needed. I cut-off some of the top, bottom and middle front section of the dust shields.

Shaking is gone...very happy.
 
so ive been looking to do this for some time, and when some more $$$ flows in i will jump on it and do so but i figured id ask here and see what you guys all thought. i already have the 17" tundra split 5spoke wheels, and was planning on going with the 231 set up but i was wondering what if i put and actual tundra big brake kit on my 4runner... it will fit the tundra so why wouldnt it fit me...? this is the link and the set up i was thinking of:

Big Brake Kits for the Toyota Tundra from HorsepowerFreaks
stop tech, its the 5th group down on the page; -(00-06) Toyota Tundra Red St-40 X Drilled 332X32

now before you all go looking at me like im crazy cause of the cost just humor me will it fit? all the other kits say they require 18" wheel to be used, but this is the wheel requirements for stop tech;
Wheel Fitment:
Whether a kit fits a stock wheel is dependent on the specific application. StopTechs ST-series calipers usually require the following:

* 328mm rotor (12.9 inches) and 332mm rotor (13.1 inches) - Minimum 17 wheel
* 355mm rotor (14 inches) - Minimum 18 wheel
* 380mm rotor (15 inches) - Minimum 19 wheel
 
Holy s-word! I can tell by the price they won't fit.

I know, I know, you said don't worry about that. If they bolt onto the Tundra, they'll bolt onto the 4Runner. And I can't imagine a company would make an aftermarket big brake kit that won't fit under the OEM wheels. But your best bet may be to call, because from what I understand, the 231mm upgrade makes such a difference on the 4Runner, that there's probably no one on this forum who has tried the Stop Tech kit you're considering.
 

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