SSR Radial vs. IROK

[onetuff76]

So I'm debating the SSR Radial (37x12.50x17) vs. the IROK (39.5x13.50x17) anybody run either of these? What's your .02?
Here's what I've got so far
Pros
SSR
10ply rating more rigid for on road
better for the DD use
IROK
Better off road
8ply rating more flexable for off road
larger size that I'm wanting to run (39)

Cons
SSR
Smaller size
10ply more rigid ride and less flexing
IROK
Softer compoundf faster wear
lower max air pressure (45)

 

[RockMonkey]

How ya gonna use em? Honestly how much on road driving versus off road? What kinda off-road do you like? Mud, rocks, high speed baja, sand... Can you fit a 39 inch tire? Will your drivetrain hold up to 39 inch tires?

 

[onetuff76]

Mostly on road being as she's my DD. But as for wheeling, its mud, rocks, snow, and some sand, so the IROK is a deffinate bonus. I should be able to fit the 39 may have to do some fender trimming. As for the drive train I'll have to regear, but I was planning on doing that even if I go to 37's. I'll probably be pushing the 44 front, but I think if I'm wise about it I shouldn't have any breakage

 

[RockMonkey]

44 front, daily driver... I think the 39" Iroks would be a poor choice.

 

[Greg]

Mostly on road being as she's my DD. But as for wheeling, its mud, rocks, snow, and some sand, so the IROK is a deffinate bonus. I should be able to fit the 39 may have to do some fender trimming. As for the drive train I'll have to regear, but I was planning on doing that even if I go to 37's. I'll probably be pushing the 44 front, but I think if I'm wise about it I shouldn't have any breakage

I's stick with 37" SSR's for the road factor & the breakage factor.

 

[onetuff76]

you honestly don't think the HD D44 could handle the 39's? I've heard of alot of other ford guys running 39's on them without any probs, as long as they don't get to happy with the skinny peddal.

 

[RockMonkey]

you honestly don't think the HD D44 could handle the 39's? I've heard of alot of other ford guys running 39's on them without any probs, as long as they don't get to happy with the skinny peddal.

Um, honestly? I have my doubts that it can handle the 37s. Creighton couldn't keep his 44 alive with smallish 35s. Your truck weighs a lot more, and I betcha it's got a lot more horsepower, too. No I absolutely don't think it can handle the 39s. Also, the Iroks are gonna wear out awefully fast on a daily driver. It's an expensive tire, do you want to fork out that cash again a year from now?

 

[onetuff76]

I've been running 35's for a few years now with no problems at all.

 

[RockMonkey]

The jump from 35 to 39 is HUUUUUUUUUGE! Way too big a tire for the 44 u-joints.

 

[onetuff76]

its an HD D44 it uses D60 u-joints if my memory serves me correctly

 

[RockMonkey]

If only that were true it would prolly be the most desireable axle on the planet. Unfortunately, it is not. It's got the same U-joints as a later dana 30. I'm sure someone on the morning crew can give us a rundown on the 8 lug 44. I don't know all the differences, but the joint is just a standard 44 joint. Sorry :-\

 

[onetuff76]

from my understanding the HD 44 that came with the high boys used D60 outers and u-joints

 

[bobdog]

from my understanding the HD 44 that came with the high boys used D60 outers and u-joints

No they have regular 44 joints and the large external hubs that look real beefy but are probably no stronger than the later smaller internal style. Earlyer highboys use closed knuckle axles with even weaker joints. Sure are a lot of misconceptions about the highboys.

 

[troutbum]

If it is open knuckle it is 297X joints. Buy some CTMs and alloys.

 

[onetuff76]

If it is open knuckle it is 297X joints. Buy some CTMs and alloys.

I think I'll wait till I break something, I know alot of XJ guys run 40's on D44's without probs, you just have to wise about the skinny peddal. I don't think I'll worry about CTM's I'd rather keep the u-joint as the weak link in the system cheaper to repair if I take out one of them. If I do snap an axle then I'll go to alloys. As for now I think I'll stick to it as is. But I think I'm leaning towards the SSR's just because of DD use... now a 39x12.50 in SSR would be lovely.

 

[2BIGTJ]

I think I'll wait till I break something, I know alot of XJ guys run 40's on D44's without probs, you just have to wise about the skinny peddal. I don't think I'll worry about CTM's I'd rather keep the u-joint as the weak link in the system cheaper to repair if I take out one of them. If I do snap an axle then I'll go to alloys. As for now I think I'll stick to it as is. But I think I'm leaning towards the SSR's just because of DD use... now a 39x12.50 in SSR would be lovely.

well it sounds to me like you have already made up your mind! I think that the information that the other guys have givin you if good info. in my situation I have a tj with a 35 and 30. I know many guys that have run 37,39,and even 40(if you dont believe me look on JU) I swape out and put a 60 in the rear and a 44 up front for the following reasons.

-Why do you want to run bigger tires?
Answer: so you can run tougher more chalenging trails.
-where are the tougher more chalenging trails?
Answer: out in the middle of nowhere.

It may just be me but I dont want to be out in the middle of nowhere trying to have a great time wheeling and the only thing that I can worry about is breaking my axle and having to spend the next few hours fixing it(that is if I remembered to bring extra parts) because I have to big of tires for the drivtrain that I am running.

Just my .02 so take it for what it is worth

 

[onetuff76]

My qualm with CTM's and extreme duty shafts is that in strengthening these parts that were designed to be weak you transfer stress to other parts (ring and pinion, locker, T-case, Tranny, even engine). So I'd rather blow a cheep joint and spend some time swapping in a new one than blowing up something that is more expensive, and difficult or impossible to fix on the trail.

 

[Caleb]

My qualm with CTM's and extreme duty shafts is that in strengthening these parts that were designed to be weak you transfer stress to other parts (ring and pinion, locker, T-case, Tranny, even engine). So I'd rather blow a cheep joint and spend some time swapping in a new one than blowing up something that is more expensive, and difficult or impossible to fix on the trail.

yes, thats true BUT quite often when an axle joint goes so does the ears of the yokes, so dont just plan to change the joint cause most the time you will be changing shafts and joint...thats why guys go with alloys and CTMs...

 

[Maverick]

My qualm with CTM's and extreme duty shafts is that in strengthening these parts that were designed to be weak you transfer stress to other parts (ring and pinion, locker, T-case, Tranny, even engine). So I'd rather blow a cheep joint and spend some time swapping in a new one than blowing up something that is more expensive, and difficult or impossible to fix on the trail.

Been running 38's on a D44 for several years, that's the only thing that hasn't broke yet, but it's not if, but when. D44 R&P is plenty strong. Carry extra shafts and joints already put together, and something to dig the axle parts out with and to trim/pound the ears down so you can get it out through the knuckle.

When Creighton ran the loaner CTM joints and shafts, we didn't break, and it was GREAT!!! Made me a believer.

btw, the info you're getting here about the D44 is correct, a 297 / 760 is the biggest joint ever offered in a D44 or "HD D44". The current "D50" or whatever it's called in the Super Duty uses a D44 carrier with D60 outers and weak unit bearings. Only the F350 gets a real D60, and it still has the suckass bearings.

The u-joints break because of the wacky angles and low speed torque. I think the breaking stress on the CTM's is still less than what the carrier can handle, but you may wanna check.

Regarding the SSR's, I asked about them recently on jeep-slc and they got shot down for many reasons. Based on that, I'd go with the regular radials, the SX's, or something else (TRX?). SX's kick ass

Brett

 

[troutbum]

xxor

I think I'll wait till I break something, I know alot of XJ guys run 40's on D44's without probs

Well welcome to the softer side of fullsizes.

Fuse theory means more breaks, plain and simple. And if your axles joints (297x or 760x) are your fuses, well that also makes the ears and inner and outer shaft part of the fuse. But to each their own, as long as you are prepared to fix your junk.