Tundra brake upgrade - will spare wheel fit?

[Milestone707]

So I plan on going with the tundra brake upgrade using the 199mm brake calipers. I’ve searched everwhere but I can’t seem to find information on whether or not the factory spare wheel will fit after doing the upgrade. Just trying to avoid having to swap the rears to the fronts in the event of a flat in the front. Any unfortunate experience with those who have the 199 tundra calipers?

 

[3bears]

i dont have the 199's . the 231's no the factory spare will not fit those. however many people have said the reason the go with the 199s is so they can use the earlier wheels and stock spare. for my solution I picked up another 5 star...got it mounted with same tire and now I do 5 tire rotations.
i believe" brillo_76 "...on this forum can answer you on this....i think he is the one who talks about sticking with the 199's for that reason. if he does not reply to this thread, then shoot him a pm.
the first biggest advantage of the tbu is the thicker rotor to deal with heat and no warping. the 2nd reason of going with the bigger 231's is a slightly bigger brake pad....but I think a lot of people dont need the bigger pad...just do the tbu rotor so no warping of rotors.... mall crusiers and not towing or doing much off road or down hill stuff can prob get by with stock...i did for a year ...on the flats. Now
3 different yotas....all in the hills...the bigger rotors and no warping is where its at for me... and I have sometimes pull atv, or two snow machines...and even a small boat...on occasion...in the hills.
that said...my latest was already set up by p.o. with tbu with 231's ( he also did some nice very mild mods)

also some have said you will have less pedal fade, soft or spongy with the 199's....i dont know...i just know for me.that if I bleed the system many times....panic stop on gravel to kick in the abs a few times....and bleed again...I can not tell the difference in my tbu brakes and non tbu brakes.

 

[Andrea]

i dont have the 199's . the 231's no the factory spare will not fit those. however many people have said the reason the go with the 199s is so they can use the earlier wheels and stock spare. for my solution I picked up another 5 star...got it mounted with same tire and now I do 5 tire rotations.
i believe" brillo_76 "...on this forum can answer you on this....i think he is the one who talks about sticking with the 199's for that reason. if he does not reply to this thread, then shoot him a pm.
the first biggest advantage of the tbu is the thicker rotor to deal with heat and no warping. the 2nd reason of going with the bigger 231's is a slightly bigger brake pad....but I think a lot of people dont need the bigger pad...just do the tbu rotor so no warping of rotors.... mall crusiers and not towing or doing much off road or down hill stuff can prob get by with stock...i did for a year ...on the flats. Now
3 different yotas....all in the hills...the bigger rotors and no warping is where its at for me... and I have sometimes pull atv, or two snow machines...and even a small boat...on occasion...in the hills.
that said...my latest was already set up by p.o. with tbu with 231's ( he also did some nice very mild mods)

also some have said you will have less pedal fade, soft or spongy with the 199's....i dont know...i just know for me.that if I bleed the system many times....panic stop on gravel to kick in the abs a few times....and bleed again...I can not tell the difference in my tbu brakes and non tbu brakes.

really appreciate the well detailed response... even though am not the OP, hopefully brillo_76 will leave a response here, looking forward to hearing what he says

 

[brillo_76]

really appreciate the well detailed response... even though am not the OP, hopefully brillo_76 will leave a response here, looking forward to hearing what he says

The 199 mm rotors are the same stock rotors except the rotors are wider then stock and the calipers are as close as you can get stock oem Size.

The late model and sport rims will fit. R16. My spares are aluminum and I have try a steel r16. I suspect they as steel rims are alot thinner then the aluminum rims.

Correction: 8/14/22


The early rims will fit. These rims will not fix my 2009 Tocuma but the 01 and 02 sport rims will

I truly expect the steel rim to fit. However, I never tried.

3 bears is correct I do the 199 mm calipers and wide rotor to solve the rotor warpage issues.

I actually rebuild the calipers from the junk yard with new o rings speed bleeders. Even sand blast them as I live in the rust belt.

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[Milestone707]

Hey guys thanks for the great information. I have yet to decide on whether or not to go with the 199 or 231. If I go with 199 I will mount my spare and report back. At the moment tho I am going crazy trying to decide on which one to go with 199 or 231. My main objective is to prevent the warping issue that I’ve experienced many times going down hill with my stock breaks. Brillo_76, why did you decide to go with the 199s over 231s? Was it strictly wheel fitment?

 

[Bad Luck]

Hey guys thanks for the great information. I have yet to decide on whether or not to go with the 199 or 231. If I go with 199 I will mount my spare and report back. At the moment tho I am going crazy trying to decide on which one to go with 199 or 231. My main objective is to prevent the warping issue that I’ve experienced many times going down hill with my stock breaks. Brillo_76, why did you decide to go with the 199s over 231s? Was it strictly wheel fitment?

199 and 231 both use the exact same rotor from 1st gen Tundra/Sequoia which means increased rotor mass which will help prevent the rotor warping. Either one will be an upgrade over stock for that purpose.

Both use the same pistons in the caliper so you will have the same pedal feel between the two. The major difference between the two is the physical size of the brake pad backing plate hence the 199mm and 231mm. Obviously the 231mm/13WL caliper is physically larger as well which may interfere with more wheels compared to the 199mm/13WE

 

[brillo_76]

199 and 231 both use the exact same rotor from 1st gen Tundra/Sequoia which means increased rotor mass which will help prevent the rotor warping. Either one will be an upgrade over stock for that purpose.

Both use the same pistons in the caliper so you will have the same pedal feel between the two. The major difference between the two is the physical size of the brake pad backing plate hence the 199mm and 231mm. Obviously the 231mm/13WL caliper is physically larger as well which may interfere with more wheels compared to the 199mm/13WE

With that being said. Since the rotors are the exact same size. What's the advantage of the 231mm calipers?

As if the pad material is the same amount of service area. It can't be pad service nor larger rotors. As those are identical.

The only difference is the physical size of the calipers. The only thing I can think of is heat dissipation.

More metal would be able to handle more heat.



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[19963.4lsr5]

With that being said. Since the rotors are the exact same size. What's the advantage of the 231mm calipers?

As if the pad material is the same amount of service area. It can't be pad service nor larger rotors. As those are identical.

The only difference is the physical size of the calipers. The only thing I can think of is heat dissipation.

More metal would be able to handle more heat.



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The brake pads are 231mm long instead of 199mm. More contact area equals more clamp force on the rotor.

The steel rim does not fit the 231 calipers. If you have a flat on the front you will need to swap a wheel to the front and put the spare in the back.

You can grind the 231 caliper to fit the aluminum typical Toyota rim of that area and not need to grind the rim. But the steel spare will never fit on the front.


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[brillo_76]

Ah. I thought the actual pad material was the same size and just the backing plate of the pad was larger. Which wasn't adding up to me.

A longer pad makes a lot more sense. Granted I am not sure why they be a need of the largest caliper on a 3rd gen. As my 199mm calipers clamp quite well.



My stock calipers clamped fairly well. I just couldn't keep the rotors from warping.

I do know the 199mm calipers pads are interchangeable with the stock calipers. Same size. Another reason why I only use the 199mm. The only change is the wider rotor with wider caliper.

Maybe heavy off roading along with Max towing loads would be a good reason for the 231mm

I just like using stock sized wheels and some well fix the 199mm. With no fitting the 231mm.



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[Bad Luck]

The brake pads are 231mm long instead of 199mm. More contact area equals more clamp force on the rotor.

The steel rim does not fit the 231 calipers. If you have a flat on the front you will need to swap a wheel to the front and put the spare in the back.

You can grind the 231 caliper to fit the aluminum typical Toyota rim of that area and not need to grind the rim. But the steel spare will never fit on the front.


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The physical pad size is the same. The brake pad backing plate is different. Here’s a thread where another member took measurements and documented just that. TBU 231mm vs. 199mm Pad Size

If the 231mm brakes were better than the 199mm brakes then why didn’t the stopping distance for tundra/sequoia get shorter starting in 2005 when the 231mm brakes were the only brake option on all trims? Personally I didn’t like the 231mm brakes on my last 4Runner.

 

[brillo_76]

The physical pad size is the same. The brake pad backing plate is different. Here’s a thread where another member took measurements and documented just that. TBU 231mm vs. 199mm Pad Size

If the 231mm brakes were better than the 199mm brakes then why didn’t the stopping distance for tundra/sequoia get shorter starting in 2005 when the 231mm brakes were the only brake option on all trims? Personally I didn’t like the 231mm brakes on my last 4Runner.

So my thinking is correct that it's only heat dissipation?


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[19963.4lsr5]

So my thinking is correct that it's only heat dissipation?


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Not thinking about it at this current time. Sorry…….


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[brillo_76]

This explains it quite well for me. This photo solves it for my confusion. The extra space is for heat dissipation the 231 mm moved the pistons to the edge of the pad edge. This would help with the heat along with slightly higher clamp force as the piston force is right on the edge of both pad edges. On the 199mm caliper the pistons are closer together. Thus the piston clamp is centralized on the smaller 199mm one.

Thanks to all those who helped clear this up for me.

 

[19963.4lsr5]

This explains it quite well for me. This photo solves it for my confusion. The extra space is for heat dissipation the 231 mm moved the pistons to the edge of the pad edge. This would help with the heat along with slightly higher clamp force as the piston force is right on the edge of both pad edges. On the 199mm caliper the pistons are closer together. Thus the piston clamp is centralized on the smaller 199mm one.

Thanks to all those who helped clear this up for me.

Sounds good to me


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[danwyl]

When I installed my 199mm calipers I found that my stock 3-spoke wheels wouldn't clear the calipers, but I'm almost 100% certain I tested the steel spare and it cleared properly FWIW.

 

[brillo_76]

When I installed my 199mm calipers I found that my stock 3-spoke wheels wouldn't clear the calipers, but I'm almost 100% certain I tested the steel spare and it cleared properly FWIW.

Hmm. Where they 15 or 16 inch?

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[brillo_76]

I can tell you these fit. As they have 199 mm calipers[TBU] under them. Maybe some do not. As I am not certain

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[danwyl]

Hmm. Where they 15 or 16 inch?

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They were 16's. It seemed like it barely didn't clear the caliper, so I wonder if it was a caliper casting thing. I could have probably shaved the caliper slightly to get it to clear, but I decided to just pick up a nice set of 5-stars instead

 

[brillo_76]

They were 16's. It seemed like it barely didn't clear the caliper, so I wonder if it was a caliper casting thing. I could have probably shaved the caliper slightly to get it to clear, but I decided to just pick up a nice set of 5-stars instead

Ok. So this confirms some r16 rims will not fit the 199mm TBU rotors. Good to know.

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[bgrump]

I can confirm that as well lol. I have slowly been rebuilding my whole front end. I originally bought 4runner rotors and pads and had no plans to do the upgrade because I didn't want to buy new calipers. I found out that one of my calipers had a seized pin and it was ruined. At that point I figured why not if I needed new calipers. I went with the 199mm because I read it was more plug and play.

I finally got the brakes in a short while ago. I haven't had anyone around to help me bleed them so I hadn't tried to put the tires back on. Last night I was browsing the forums and I came across this thread. I knew I was screwed. I went out to the garage and yep the caliper is too big for the r16 wheels.

Lucky I bought some F5s a while ago. They will go on when I get new tires. But for now I am still a ways off from getting my rig back on the road and am not ready for tires. I just ordered some 1/4" spacers and am hoping that will allow me to get the tires back on so I can start working on the rear.