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Simex JT2's Question (have searched)

General Tech Talk

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Simex JT2's Question (have searched)

Post by ToNkA »

Done some searching but want to know what these are like on the road.

I now have a company car so can get away with not driving the lux as often (even though its more fun driving it). Instead of the hassle of changing wheels for every trip, I could just leave the JT2's on the truck full time. And sell the MTR's I now have to get some $$$ back.

Anyone use their JT2's on a Daily Driver?
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Re: Simex JT2's Question (have searched)

Post by MY45 »

ToNkA wrote:Done some searching but want to know what these are like on the road.

I now have a company car so can get away with not driving the lux as often (even though its more fun driving it). Instead of the hassle of changing wheels for every trip, I could just leave the JT2's on the truck full time. And sell the MTR's I now have to get some $$$ back.

Anyone use their JT2's on a Daily Driver?


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Post by ToNkA »

Will do, anyone else?
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Post by N*A*M »

me :D
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Post by DFND90 »

Ive only had mine on for a couple of weeks so i cant comment on how they wear.
As for handling, mine has improved because i came from tall thin cookie cutter tyres. The extra width has made my truck feel more stable.
They are also quieter than my old tyres which hummed quite loudly at all speeds. The JT's in my opinion are a much lower frequency hum, almost like a vibration.
I drove them in the pissing rain yesterday and they felt a bit dodgy but only because they were on 16psi :D
AWSOME in the mud though. Did a run last night and just idled through heaps of slops with minimal wheel spin.

Thats my limited experience, hope some of it helps ToNkA
Last edited by DFND90 on Thu Feb 03, 2005 9:24 am, edited 1 time in total.
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Post by Area54 »

They are fine, noisy, but fine. Might need a bit more maintenance in the long run (compared to radials) as the tendency to let them down more than the radials will induce issues. More dirt/mud in the bead and the pellets of dirt inside the tyre (more cleaning) , the less contact with the rim to bead will allow the rim to spin in the tyre (balances more often), tyre rotations more often to get even wear - the large lugs will create excessive heel /toe wear patterns. I've run two sets of JT2 and pedes on both the lux and the mav, quite good life out of the rubber.

Apart from the other issues (prolly aware of anyway) flat spotting overnight, and the cessna noise :)
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Post by scotto »

I recently got JT2s...

They sound like an plane at +60km/h. While they are not super soft, being knobbies you'd lose the sharp edges off the lugs pretty quick esp if you drive hard corners etc. they wouln't wear nicely like your mtr's either ...heel/toe yada yada

while not a daily driver I will say they are reasonably well mannered on road though i do allow for extra stopping distance, at high pressure they steer fine ( you know the bias ply turn before the corner method)
i drive to the bush on mine they are fine. i do keep a second set for road trips though

how many k's a day do you do
how much do you earn = fark it wear them out and buy more later :twisted: remember there is a big market for 2nd handers if you change your mind

dont forget they are sick tyres
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Post by bogged »

Im still runnin 2 sets of hoops. MTR/JT's.

JT's will flat spot to buggery overnight, which shakes your teeth out for first few klms when you start off - and I mean shake...

Theres nothing to stop you doing it, but I'd throw it up on stands if it was to sit for 2+ weeks.
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Post by Area54 »

bogged wrote:Im still runnin 2 sets of hoops. MTR/JT's.

JT's will flat spot to buggery overnight, which shakes your teeth out for first few klms when you start off - and I mean shake...

Theres nothing to stop you doing it, but I'd throw it up on stands if it was to sit for 2+ weeks.


This can be funny as - driving your rig with month long flat spots. Vehicles behind give you a real wide berth - no tailgating! the lux has pedes on all the time, drove it the other day and the whole rig shakes - the roll bar almost fell off (it is after all made of pool noodles...) :lol: :lol:
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Post by 83 lux »

i drove on then for a long time
as a daily driver
they are fine they wear very quickly and are nosiey
but they are fine
Drive on them :twisted:
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Post by DFND90 »

I had mine sitting for 5 days on 30 psi and i didnt notice any flat spots when i went for a drive last night??

They are currently sitting on 16psi so that may make a difference eh?
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Post by defender kev »

i've been using my jt2's on my landy as a daily driver for about 6mths and reckon there alright but i only do about 50k's a week.I am happy with the way they are wearing and are used to the noise and flat spots. :D
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Post by bogged »

defender kev wrote:i've been using my jt2's on my landy as a daily driver for about 6mths and reckon there alright but i only do about 50k's a week.


You poor thing...
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Post by HG »

I ran JT2"s as daily drivers for over 12mths and they were ace on road and in the wet they still stopped well and the noise is plane like :D . Got good wear out of them buy rotating them regularly including the spare and offroad they are TOPS, If only Simex would bring them out in 36"
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Post by shorty_f0rty »

pretty happy with mine so far although they have had more on than off road use.

- in a softtop they are noisy as hell at any speed over 60
- on the gravel back from rover park i found they didnt perform as well as Id hoped, the back kinda stepped out, dug in and sent me to the other side of the road at about 60kph..
- on slick mud they dont spin much but still slide around
- did very well in some decent mud
- havent really been in a serious downpour with em on yet either but would be extra cautious regardless
- at 35psi i dont get flatspots when left for a week without driving
- some minor front end wobbles some times though nothing major
- the 33x10.5xr15 are about 34" new, are phat but still dont rub on the inside gaurds..
- with the jt2's on i drove less but that is just my paranoia
the more comfortable i get about not getting busted by the cops the longer i reckon they will stay on.. at the moment I have a set of cheese cutting AT's to swap em when no plans to go out..


so yeah.. TWO THUMBS UP! :armsup:
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Post by scotto »

bogged wrote:Im still runnin 2 sets of hoops. MTR/JT's.

JT's will flat spot to buggery overnight, which shakes your teeth out for first few klms when you start off - and I mean shake...

Theres nothing to stop you doing it, but I'd throw it up on stands if it was to sit for 2+ weeks.


:rofl: i had my first lesson in this last weekend. they been sitting with about 22psi in them for 2 weeks . it rumpled like like buggery i thought the wagon had broken and was falling apart :shock:
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Post by Slunnie »

I did, and you can use them as DD's, but it really just depends on how tolerant you are. If you only use your truck for bush days then its just too easy leaving the JT2's on .

For DDing the traction on them are ok, the thing that eventually made me by some new rims and another set of MTR's was the flat spotting that occurs. This drove me crazy and after a few months I spat the dummy. I thought there was no point is paying a stack for the truck and having it ride like a POS while cold. The older the tyres the bigger the flat spots become and the longer they take to warm out. The noise you can live with the running vibrations you can live with also. The other thing is that in an emergency, the lack of braking stability may also see you come unstuck.
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Post by Bitsamissin »

Yeah the flat spots are annoying and they shake the absolute begeezus out of the truck for the first few K's.
I don't reckon they are a good handling road tyre at all (nor are they meant to be) especially cornering with the big lugs and sudden stopping in the wet. Going from a BFG mud or MTR is a big downgrade in onroad handling but a massive improvement in offroad ability.
Mines not a daily driver so I just leave them on.
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Post by marin »

i would have to say cornering in the wet is a test of nerves, first time it understeered scared the crap outa me! You leave a bigger gap in traffic, and cars jump in front, so you need to slow down again to make another braking gap, etc etc normal city driving crap. As long as you are willing to drive to the tyres, no worries. and dont worry about tyre noise, earplugs are cheap, unless you already have a stereo that is LOUD.
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Post by MYTTUF »

I reckon mine are the best "off road" tyres I've driven on, on road. So much so that when the new "wife's" car arrives, I'm gunna take em off the beadlocked rims and mount em on the GXL rims as my road tyres. (The muddies are nearly dead ) Bear in mind that it wont do many km's as I've gotta work van to use during work hours.
My problem then will be what tyres to get for the off-road trips to the High Country in the winter time??
Last edited by MYTTUF on Wed Feb 09, 2005 2:49 pm, edited 1 time in total.
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Post by bogged »

Bitsamissin wrote:don't reckon they are a good handling road tyre at all (nor are they meant to be) especially cornering with the big lugs and sudden stopping in the wet.


Im with you, I wasnt going to say anything as I though I was the only one that thought that LMAO... they suck in the wet on the road. specailly icey roads...
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Post by bogged »

MYTTUF wrote:My problem then will be what tyres to get for the off-road trips to the High Country in the winter time??


Q78's you got the room in the garage for em ;)
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Post by MYTTUF »

bogged wrote:
MYTTUF wrote:My problem then will be what tyres to get for the off-road trips to the High Country in the winter time??


Q78's you got the room in the garage for em ;)


The space in the garage isnt the prob, its the space in the wheel arches that'll be!!.

Oh and the JT2's are on and will be my daily driven on tyres and seem to be good. The wifes gone out in the 80, so I'll let you know what she reckons when she returns.
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Post by zzzz »

I have driven on them for a year or two.
Then changed to 35" pedes.
Then changed to 36" pedes.
And back to 34" JT2's again.

The 36's were the best onroad easily as the three centre lugs made them quieter and seemed to grip better.

I find the JT2's are fine in the dry, just a little flat spot issue when you first drive off, and some noise all the time.

I don't really like them in the wet at all.
I can break traction in first and second and seem to powerslide everywhere.
Jeep is probably around 240hp or so.
Have lost the rear end around corners a heap of times in the wet, escpecially off camber.
I am running a detroit which wouldn't help either :)

Not sure if the characteristics hold true for all different weight vehciles, or horsepower and driving styles.

They were cheap though so I am using them as my road tyres, but in case you hadn't noticed I was trying to find someone that wanted to swap some 35" muddies.

So if anyone wants a swap let me know :D

Love them off road and wish they would make a 36" :armsup:
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Re: Simex JT2's Question (have searched)

Post by scotto »

ToNkA wrote:Done some searching but want to know what these are like on the road.

I now have a company car so can get away with not driving the lux as often (even though its more fun driving it). Instead of the hassle of changing wheels for every trip, I could just leave the JT2's on the truck full time. And sell the MTR's I now have to get some $$$ back.

Anyone use their JT2's on a Daily Driver?



hang on a minute........

if you have a company car for during the day/week..
why are you concerned with daily driving JT2s?
do it
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Post by bruiser »

For the uneducated who has a tame set of st's

Flat spotting? Why does this happen, and what exatly is happening, how long to fix.

Also, do these tyres ever have a pefect balance, or are they always vibrating.

Thanks Steve.
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Post by bogged »

bruiser wrote:Flat spotting? Why does this happen, and what exatly is happening, how long to fix..


soft rubber + Heavy car = flat spots

remedy: Take tires off and put in shed.
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Post by scotto »

bruiser wrote:For the uneducated who has a tame set of st's

Flat spotting? Why does this happen, and what exatly is happening, how long to fix.

Also, do these tyres ever have a pefect balance, or are they always vibrating.

Thanks Steve.


my understanding is the bias plies 'settle' or sag when they are cold
the longer they sit the more that saggy sorta shape sets in

once the tyres 'warm up' they regain roundness but they shudder and vibrate til then. why bother? well the sidewall has 6 layers and the belts are all criss crossed and overlapped = they are a sh!tload tougher and stake resistant at low pressure. yeah they balance. they dont always vibrate but the tread on bitumen they whirrrrrrrrr which is close enough

they aren't made for the road are awesome tyre in the bush
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Post by ISUZUROVER »

Flat spotting is far worse with cross-plys than radials. Most tyres take longer than a day to plat spot (unlike simex it seems), so if the truck is driven at least once a week it should be fine.
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Post by bruiser »

I see.
Thanks for that.
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