Topic: Big ole tires

[woodfella]

Ok, I DID search I am very close to going 39.5 on my junk. Some say "DO IT DO IT". Others, well...not so much. It's got longs.arps ect. Feel free to chime in Am I asking for trouble?

[axled89]

does your axle have gusset's and the truss on it to??   and i would say do it if you want if it does have the strenght for it.    WHY NOT.

[woodfella [OP]]

Why yes, yes it does. I have one friend that I do respect his opinion telling me it's a bad idea. He's sayin that the toy size gear just doesnt have the sack to stand up to 39's. I know alot of guys are running them, but dont know anyone personally who is. Dont really feel like blowin my whole set up to hell but I do want more tire.

[axled89]

i guess he's kinda right there, but you can have them cyro frozen or what ever that's called.
and then the rest is up to your discrestion.

[woodfella [OP]]

Cryo'd and heat treated, high pinion and v6:thumbs: I guess I'm just lookin to hear from someone who's rockin like that currently. How tall are you runnin?

[wesley]

im running 37s... with the longs and gussets and air locker. im not worried about breaking anything. but in your case i would worry about shearing knuckle studs putting so much pressure on them for turning. and also your diff choice. is it locked or limitted slip or selectable locker or even open. because if its fully locked up front i would say dont do it

[woodfella [OP]]

Arb w/529's. Arp's in the knuckle and hub. And hydro assist. Im stupid I know

[Yota Tony]

The pinion might be your weak link. I've heard have higher gears like 4.10s will be stronger with rubber that big.

[wesley]

hes right it would be stronger. but you need a hell of a motor and trans to turn 39.5's under a yota with 4.11's

[possume22]

all the bunch i ride with have 39.5 iroks to 42s were all wleded diffs full hydro all stock studs exept one with homemade arms one 4.3 in a sami the rest yota 22r on propane yotas we all have daul casses stock gears plenty power for off roading we not street legal at all some with longs some dirty 30 some stock have seen a few longs broke and a few stocksbirfs broke  no dirtys broke yet to see some footage on you tube just type mayhem off road viola tn you should see proof some tires that big arent bad but wouldnt recomend heavy boggers and tsls though thanks for reading and check us out

[Steve_925]

last season i was on toy mini axle up front and fj 80 in the rear with 39.5 iroks and the only thing i broke was a steering pin(the pin that goes through the arm into the trunion bearing) and that was im sure from the 3" wheel spacers. and i wheel HARD. your set up is fine, check your knuckle studs often and you'll be fine

[woodfella [OP]]

last season i was on toy mini axle up front and fj 80 in the rear with 39.5 iroks and the only thing i broke was a steering pin(the pin that goes through the arm into the trunion bearing) and that was im sure from the 3" wheel spacers. and i wheel HARD. your set up is fine, check your knuckle studs often and you'll be fine

Thats what I need to hear.

[crazykooter]

My buddy runs Calroc for 2 years on 27 spline longs welded gears and stock steering arms and full hydro.  Calroc is harder on a rig then pretty much any trail due to it being a timed event plus skill level. He was running 39.5 iroks and besides breaking knuckle studs and trashing a few sets of trunion bearings the toyota axle handles the tires fine.  He since upgraded to 30 longs and 6 shooter knuckles plus an arb front.  I guess we will see how it goes this yr for him.  He tends to push his rig very hard so if he doesnt break something its a miracle. lol

[woodfella [OP]]

Now I'm getting excited

[ToXic80Avenger]

I was running 39.5 IROKs on my '85 and only broke a couple of stock birfs. I had dual cases and stock gears and had no real trouble of the trail.  One of the guys in our groups has a 4.3 and 40's and he never breaks birfs. So I don't see to much of an issue.

[skinneykansas]

no issue. your set i know so many people that run 39's and up on stock birfs and stock studs your set. pretty much do it. whoever is telling you not to is prob jealous and still running 37's haha

[Dingman.]

i have 40's for the snow, they won't see rocks until i get dual cases.
That is with 5.29's in the axles.I have blown up a few diffs, but it was freak accidents, not so much the tire size.

Thomas took his ride to the rubicon with 42" iroks, 2.5" bs wheels, hydro assist, 5.29's spool in back lockright in front, dual ultimates, arp studs with a 5th stud kit and did fine.

I think it comes down to how lucky you are.  Some of us are less lucky than others when it comes to breaking parts. lol

[twistedtoy92]

I loved my 39.5's!  I ran 22re, 4.10's locked f/r, dual cases and daily drove the beast..... It was a blast!!!

I say DO IT!

[woodfella [OP]]

Done!

[-Jake-]

lol now you've got me searching craigslist for 40s!

[superyota]

do it!  i'm trying to trade my 37in. mtr's right now for a set of 39.5's.  had a buddy that ran 39.5's in his yj with toy axles under it.  did great until he broke the lockrite.  then he spooled it, problem solved. 

[Slolyfe]

last season i was on toy mini axle up front and fj 80 in the rear with 39.5 iroks and the only thing i broke was a steering pin(the pin that goes through the arm into the trunion bearing) and that was im sure from the 3" wheel spacers. and i wheel HARD. your set up is fine, check your knuckle studs often and you'll be fine

It will hold no prob.

[drew303]

The pinion might be your weak link. I've heard have higher gears like 4.10s will be stronger with rubber that big.

Just an interesting article comparing a 571 gear to a 410 gear set (5.29 would be comparable to)

http://gearinstalls.com/410suck.htm

By ZUK.

[joey0712]

I run 39.5 iroks... Stock steering studs hydro assist longs and geared duals...I havent had ne problems just keep your steering nuts tight and dont go crazy. U HAVE to have Longfields tho. If u run that big of tire on stockers your just gonna be a trail tampon...