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Old 12-18-2017, 11:01 AM
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Stock brakes with 37 inch tires

I have a 2014 Jeep wrangler Rubicon unlimited and i plan to run 37s and i have 17 inch xd series wheels could i run the tires with my stock brakes and if i could how would it be and if i cant could someone please link me a break kit that would work with my jeep thanks for your help

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Old 12-18-2017, 11:16 AM   #2
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I have a 2014 Jeep wrangler Rubicon unlimited and i plan to run 37s and i have 17 inch xd series wheels could i run the tires with my stock breaks and if i could how would it be and if i cant could someone please link me a break kit that would work with my jeep thanks for your help
When I moved from stock Rubicon tires to 35" tires on my JKU, I could not believe how much my braking distance increased. I felt unsafe. With 37s it would be even worse. I installed Teraflex Big Brake Kit on the front and Teraflex Rear Performance Big Rotor Kit. My Jeep now stops a lot better than it did with stock tires. I never changed the master brake cylinder on my 2015 but some people have on earlier JKs.



https://teraflex.com/shop/category?c...gler+Unlimited

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Old 12-18-2017, 01:16 PM   #3
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Quote:
Originally Posted by DedonnoN View Post
I have a 2014 Jeep wrangler Rubicon unlimited and i plan to run 37s and i have 17 inch xd series wheels could i run the tires with my stock breaks and if i could how would it be and if i cant could someone please link me a break kit that would work with my jeep thanks for your help
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Old 12-18-2017, 01:21 PM   #4
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I just went to 37s last week and put a set of hawk LTS pads on the back based on recommendations from a local 4wd shop. Rears seem to do most the work on a jku. Huge difference for 50 bucks. May do the big rotar and pads up front but not in any rush.
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Old 12-18-2017, 01:26 PM   #5
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I have 2016 JKU with 37's and stock brakes and don't really notice a huge difference on the streets. However, in 4 low, I feel I could use a little more brake.

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Old 12-18-2017, 01:31 PM   #6
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Old 12-18-2017, 01:50 PM   #7
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Brakes, steering, suspension, are safety items. I would not skimp on them, certainly not for aesthetics. Safety is not just you池e own.
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Old 12-18-2017, 05:40 PM   #8
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First off they're brakes, not breaks. Dynatrac progrip is the best. Will bring 37's down 30% shorter stops than OEM brakes according to their testing. I run them and they're awesome.

Ask yourself if you'd rather stop 3 car lengths quicker and avoid a collision or "save" $1000.

Other "requirements" for 37's:

gearing of 4.88
gusset the front C's
if you'll play in the rocks- hydro assist steering
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Old 12-18-2017, 06:03 PM   #9
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My 2014 JKU received the Powerstop Extreme vented rotors and ceramic pads. Also installed braided lines. I知 on 37痴 and seemed to get back most of my braking on the street but could probably use a little more when on the big rocks


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Old 12-18-2017, 07:16 PM   #10
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When I upgraded to 35s I installed front and rear TeraFlex big rotors and Hawk LTS pads. The combo is awesome!
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Old 12-18-2017, 07:26 PM   #11
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First off they're brakes, not breaks.
If he can稚 stop fast enough, they probably could be called 澱reaks!
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Old 12-18-2017, 07:44 PM   #12
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It is almost certain that something will break with 37 inch tires and stock brakes.
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Old 12-18-2017, 07:44 PM   #13
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First off they're brakes, not breaks. Dynatrac progrip is the best. Will bring 37's down 30% shorter stops than OEM brakes according to their testing. I run them and they're awesome.

Ask yourself if you'd rather stop 3 car lengths quicker and avoid a collision or "save" $1000.

Other "requirements" for 37's:

gearing of 4.88
gusset the front C's
if you'll play in the rocks- hydro assist steering
Oh c知on, give him a break! We don稚 grade for spelling or grammar, if we did we could spend all day correcting people.

Although I have 35痴, I ran the TF big BRAKE kit due to weight of all the accessories. Works/stops awesome. With you wanting to go to 37痴, I would say to upgrade all, not just pads.
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Old 12-18-2017, 09:07 PM   #14
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I知 just glad the break/brake difference bothers more than just me... grammar lives matter. Or something.


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Old 12-18-2017, 09:36 PM   #15
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I知 just glad the break/brake difference bothers more than just me... grammar lives matter. Or something.


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I am an engineer or at least I was until I retired. I have tech writers to correct my mistakes.
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Old 12-18-2017, 09:41 PM   #16
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Give the guy a brake
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Old 12-18-2017, 09:48 PM   #17
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I am an engineer or at least I was until I retired. I have tech writers to correct my mistakes.

Congrats

Let痴 hope your doctors don稚 think that simply.


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Old 12-18-2017, 09:54 PM   #18
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I'm sorry, but the only reason I opened up this thread was bc I really wanted to know what stock park broke with 37" tires lol
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Old 12-18-2017, 11:01 PM   #19
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Congrats

Let痴 hope your doctors don稚 think that simply.


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Can't read there written period, that is why they have nurses call in there scrips and annotate there charts.
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Old 12-18-2017, 11:56 PM   #20
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Can you run 37s with stock brakes? Sure. Will you experience brake fade and greatly extended stopping distance? Yes.

I did stock brakes on 37s years ago and didn't like it. Ran the Teraflex BBK with 40s and I could stop on a dime. I strongly recommend it.
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Old 12-19-2017, 09:27 AM   #21
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Can you run 37s with stock brakes? Sure. Will you experience brake fade and greatly extended stopping distance? Yes. I did stock brakes on 37s years ago and didn't like it. Ran the Teraflex BBK with 40s and I could stop on a dime. I strongly recommend it.
I run the Teraflex BBK (calipers, rotors pads) with my 37s and I couldn't be happier! It's a huge improvement over the stock brakes.

Running 37s (and even 35s) on the stock brake system is very, very unsafe!
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Old 12-05-2019, 02:04 PM   #22
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Any Updates?

Background: Originally a mechancial engineer, I did road racing and oval track racing for a long time. Now I'm buying a used JKU (although I like XJs and WJs)

My goal: find the current late 2019/2020 options to increase the stopping force of JK brakes. This tread is now 2 years old.

The engineering: 37" tires reduce braking effectiveness by reducing the lever arm 14% (37" vs 32") and adding the equivalent of 240lb mass to the vehicle.

The ways to increase stopping force and/or reduce pedal pressure are to increase the radius of the brake caliper, increase the friction coefficient of the brake pads, increase the piston sizes in the brake caliper (only compare one side on fixed calipers) or decrease the master cylinder piston diameter. The last two trade pedal travel for increased pressure.

Note that all these kits run into limits of what fits in a 17" wheel. Some offer larger rotor diameter kits, but those require 18" or larger wheels. I doubt anyone here is looking for wheels larger than 17".
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Old 12-05-2019, 03:56 PM   #23
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Start with a dictionary:

Breaks. Time away from a given task.

Brakes. - Automotive application of stopping ability.
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Old 12-05-2019, 05:15 PM   #24
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Quote:
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Background: Originally a mechancial engineer, I did road racing and oval track racing for a long time. Now I'm buying a used JKU (although I like XJs and WJs)

My goal: find the current late 2019/2020 options to increase the stopping force of JK brakes. This tread is now 2 years old.

The engineering: 37" tires reduce braking effectiveness by reducing the lever arm 14% (37" vs 32") and adding the equivalent of 240lb mass to the vehicle.

The ways to increase stopping force and/or reduce pedal pressure are to increase the radius of the brake caliper, increase the friction coefficient of the brake pads, increase the piston sizes in the brake caliper (only compare one side on fixed calipers) or decrease the master cylinder piston diameter. The last two trade pedal travel for increased pressure.

Note that all these kits run into limits of what fits in a 17" wheel. Some offer larger rotor diameter kits, but those require 18" or larger wheels. I doubt anyone here is looking for wheels larger than 17".
Welcome to the Forum.
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Old 12-05-2019, 06:25 PM   #25
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Stock breaks with 37 inch tires

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Oh c知on, give him a break! We don稚 grade for spelling or grammar, if we did we could spend all day correcting people.

I致e noticed a sudden spike in people conducting grammar enforcement activities. - Very odd. We all know that the app puts this stuff together and often we池e busy doing many things at once to go back and re-check.
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Old 12-05-2019, 09:13 PM   #26
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Oh c知on, give him a break! We don稚 grade for spelling or grammar, if we did we could spend all day correcting people.
.
We don"t? Says who? It's definitely not a typo...........
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Old 12-05-2019, 09:31 PM   #27
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Stock brakes with 37 inch tires

With the 37 inches, breaking some things and not braking others.
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Old 12-05-2019, 10:16 PM   #28
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Oh c知on, give him a break! We don稚 grade for spelling or grammar, if we did we could spend all day correcting people.
Evidently our school systems are no longer spending much time dealing with such things either since it seems to be becoming much more prevalent. As long as enough people are willing to overlook such things it will certainly not get better.
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Old 12-05-2019, 10:28 PM   #29
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The public schools are too busy brainwashing kids with socialism to bother with that. Then it gets even worse in college. The grammar is the least of the problems our nation is facing.
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Old 12-05-2019, 10:29 PM   #30
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Evidently our school systems are no longer spending much time dealing with such things either since it seems to be becoming much more prevalent. As long as enough people are willing to overlook such things it will certainly not get better.
Agreed. This world communicates more and more online. I don't know you and you don't know me. If you can't write with correct grammar and some semblance of coherence, I assume you're a bit dim. I'm not perfect and I don't expect perfection but come on, loose, breaks, etc.

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