Why only 31" tires on a 27?

Don't mean to hi-jack this thread...I'm running 32 11.5 R15 tires on my 67 CJ5 (not the tuxedo edition) what's the reason about the smaller tires, or does this not apply to a regular CJ5?...these were the tires that were on it when I got it, plenty of tread left on them so wasn't planning on purchasing new ones just yet.

Last question...what are some of the companies out there that provide the brake upgrades that are fairly easy to install and affordable?

Thanks, Matt

 

Separated from another thread. Please see #19 from Forum Rules and Guidelines as listed below:

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To answer the question about 32's and a 25/27. It has to do with differential and axle strength. Whether it holds up is dependent upon driving style and useage. I ran a 25 with 33" tires for years. As soon as I was getting tough enough on it to start breaking I built a 44 front. I run my stuff hard but also am very careful about shock loading the drivetrain which kills stuff very quickly.

Regarding brake upgrades, I'd recommend R&P http://www.r-p4wd.com/
who also offer rear disc brake kits for the tapered and flanged 44 or Hermtheoverdriveguy http://www.hermtheoverdriveguy.com/index.htm. "The Jeep Guy" does too but beware if you deal with him. Besides, he learned what he knows from R&P so might as well go to the source.

 

There not the strongest axles in the world so 31" is said to be within safe limits to prevent breakage. And if youve got lockers and a big engine and push it pretty hard offroad. If your nice to your jeep genrally you can get away with bigger. Iv had 35s on mine for years without problems

 

Guess I am unsure as to what the tire question is? There are plenty of guys/gals on here that have run 33's, 34's, and 35's on the D27 myself included for many years. Your 32's should be just fine, it's all in how you use the skinny pedal

Edit: Just saw that this came from another thread

 

what causes shock loading of the drive train. dont like breaking things on a remote trail.

 

I am glad this tire size deal was brought up. I was debating on the tire size but you guys have cleared it up for me.

I went to the local Goodyear shop and looked at those new MT/R's with the kevlar sidewall and they are really awesome looking tires up close. I was surprised because as a newcomer to this world of Jeeps I thought I would need a really aggressive tire like a super swamper TSL or a LTB to get by in mud or any terrain I came across.

I was watching trucks on spike yesterday and they were testing their XJ in Kentucky and they were running BFGoodrich tires that were similar to the MT/R's and they went right though a rock garden with them with no problem.




I am so glad I found this website now! Thanks All





Todd :hurrican:

 

Wheel hop is one way. Learn to back out of the throttle at the first hint of wheel hop in the front end.

 

Thanks for all the help, sorry again about how this thread started, been awhile since I've posted. I'm figuring that I'm ok for now on the tires, I don't get to crazy with it right now. Another question on the brakes though...a little surprised by the price for only the front end conversion (+$500)...Would the first initial upgrade to make be changing the singe res mc to a duel mc?

 

you can do the disc conversion yourself with various off the shelf/ junk yard parts. Theres writeups on it around. Personally i dont have any problem with drums. I can nearly lock them up if i press the pedal hard enough.

 

I'm fine with the drums also...mine lock up if I push down hard also, although I need to adjust the star's as when I push hard it sometimes pulls to the left...I'm guessing that just means the left front wheel needs to have the star spun some to put the pads out a little further?? Do you have the duel res master cylinder?

 

yup i spin the star till it scrapes then back it off till it doesnt. I know my 46 is single cyl cant recall on my 67 i think its dual. its stock whatever it is.