Rockcrawling tyres [Archive] - AUSJEEPOFFROAD.COM Jeep News Australia and New Zealand

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Jimmyb
20-06-2005, 10:30 AM
With the advent of Aussie Rock crawling, its interesting to see different opinions on tyres to use.

I have noticed through my own experience that the likes of a MT Claw is great on strength, on sharp dry rock, but put it on a slippery wet rock and you really need to get the ponies up to get traction.

I personally now feel that a road going style, ie closed thread like a GY Wrangler tyre or a SX Swamper would be a better bet over the big lugs.

What is also interesting to see is the size choice, most are going for a 37", manufactures are following the trend and using tha tas a standard size. This is fine, light weight etc for a moon buggy, but what happens when you wanna build a TT style vehicle. You loose out on some really well designed rubber like the Krawlers.

Pfft!

Gordo
20-06-2005, 10:38 AM
JB,

Most rigs at werock were running (in order)

Swamper sx (grooved + ungrooved)
boggers (grooved + ungrooved)
Krawler
Claws (winning moon buggy had these)
Mtr

Krawlers were VERY impressive in mud, water AND on the rocks

maddog
20-06-2005, 10:56 AM
Yeah I've been through the tyre thing just a couple of weeks ago. In the end it came down to 39" IROKs or 38.5" TSL/SX.

In the end the TSL/SX won over the IROK because they're a better all round tyre. The IROK seems to be great on the rock but not so good in mud or loose dirt.

FireTruck
20-06-2005, 09:46 PM
since grooving my SX's they have been great... seem to hook up well on all sorts of terrain, and flex better too I think.

I don't know what I will run next yet - gunna get some more miles out of the SX's for now.

S.

Wooders
20-06-2005, 10:21 PM
Still debating this myself.....Not a lot of options in the size I want though :(

TJ
21-06-2005, 07:24 AM
horses for courses i say.
at superior the other weekend with beebee's lux we did a test of krawler v. bogger driving up onto exactly the same rock, same marked position, at various psi's, and the krawler just didn't grip and conform.
sure they work great on the buggy's though and if ruff says they are the best and would use nothing else well...
i guess it's just an expensive exercise testing which ones work for your truck :)
or if you can borrow a set to test like the above, well it narrow's it down fairly cheaply ;)

Wooders
21-06-2005, 12:22 PM
Yeah but when are boggers coming out in 20" sizes :?: ;)

FireTruck
21-06-2005, 12:36 PM
Who cares? Unless you are going for 40"+ meats, it would be crazy to go for 20" rims in my opinion... just not enough sidewall. You can see this from Pete A's 41" Iroks on 20" wheels on his tow rig - they are like low profile street tires.

They make 37" boggers for 17" rims, and they make a whole range of Iroks for 17 and 20" rims.

More and more tires coming out for 17" rims - that's the size I would be looking at if I didn't have 16.5's.

S.

Wooders
21-06-2005, 12:40 PM
Who cares? Unless you are going for 40"+ meats, it would be crazy to go for 20" rims in my opinion... just not enough sidewall. You can see this from Pete A's 41" Iroks on 20" wheels on his tow rig - they are like low profile street tires.


40" tyres on 20" rim = 10" sidewall......That's the same as a 35x12r15....Ample I would have thoughts.....
Plus you get more stability due to less sidewall roll on the offcamber stuff.

Jeff
21-06-2005, 12:43 PM
Wooders, what the hell are you up to with your rig?

Wooders
21-06-2005, 12:44 PM
Going bling mate ;)

FireTruck
21-06-2005, 01:53 PM
...that's why I said 40"+ mate...

In my opinion, for decent sidewall flex at a decent pressure (so that hard contact doesn't allow the rim to hit the rocks and be damaged), and decent sidewall stability, 10" would be the minimum amount of sidewall.

I think 10-12" is about where I would like to be, but this also depends on the tire you run (how thick the sidwalls are, radial or bias, width of tire, etc).

Actually, just realized that I am at 11" of sidewall... fancy that.

S.

TakeTwo
22-06-2005, 07:44 AM
If I put a set of 40"s on the Jeep with the dana 30 in the front, it will break.. if it breaks then I can justify the diff upgrade and just explain to my gf that another Jeep part failed.. she will understand

Wooders
22-06-2005, 12:22 PM
TT,
I don't see why not - That was my approach ;)

Shane,
Yeah I know - was just picking on it.
At this stage I'm looking for something in the 40x13R20 size.
20" (rims) to clear the brakes,
13" to match the stock diff tyre width,
40" because that should be a neat fit.
R because I want it road legal and couldn't be frigged running 2 sets of rims/tyres ;)

Saxon
24-06-2005, 03:26 PM
TT,
20" (rims) to clear the brakes,


Sounds like some interesting diffs you have there. :)

TakeTwo
24-06-2005, 03:28 PM
road legal.. haha.

Hekta
05-07-2005, 02:22 PM
I like MTR's.

at superior the other weekend with beebee's lux we did a test of krawler v. bogger driving up onto exactly the same rock, same marked position, at various psi's, and the krawler just didn't grip and conform.
sure they work great on the buggy's though and if ruff says they are the best and would use nothing else well...
Ruff is also sponsored by 4x4 Sport Australia ;)
Claws (winning moon buggy had these)
Adrian's Claws were a new (I think) comp spec mega soft compound. You could mark them with your fingernail and bend the lugs around with your hand :o

JEEP1
11-07-2005, 08:43 PM
whats every1s thoughts on the simex extreme trekkas 2

polly
12-07-2005, 07:01 AM
[/url]whats every1s thoughts on the simex extreme trekkas 2

dont really like them cos they have the 3 rows in the middle of the tread,

[url="http://www.procomp.com.au/Html/Pc_Product_SimexExtremeTrekker2.htm"]http://www.procomp.com.au/Images/PcImg_SimexExtremeTrekker2Ak.gif (http://www.procomp.com.au/Html/Pc_Product_SimexExtremeTrekker2.htm)
would be better only having 2 rows like the ET

http://www.procomp.com.au/Images/PcImg_SimexExtremeTrekker.gif (http://www.procomp.com.au/Html/Pc_Product_SimexExtremeTrekker.htm)

Wooders
12-07-2005, 07:38 AM
Great mud tyre - BUT I don't think it would be the best rock tyre.

TakeTwo
12-07-2005, 07:40 AM
Given there is more mud in Vic than rock, a mud bias tyre would seem more suitable unless you know of some rock in this muddy end of the world that I dont know about.

Wooders
12-07-2005, 07:44 AM
AHHH but the thread is about ROCK crawling tyres ;)......
Otherwise I;d say grab a set of boggers and cut out the small lugs :mrgreen:

TakeTwo
12-07-2005, 07:52 AM
lol.. I was sort of replying to Polly who is from Vic, but then Jeeps1 is not from Vic and if I go to the start of the thread, yep, there it is, Jimmy is asking about Rock tyres. I will just pretend I didnt post anything :)

MattW
12-07-2005, 08:13 AM
[/url]

dont really like them cos they have the 3 rows in the middle of the tread,

[url="http://www.procomp.com.au/Html/Pc_Product_SimexExtremeTrekker2.htm"]http://www.procomp.com.au/Images/PcImg_SimexExtremeTrekker2Ak.gif (http://www.procomp.com.au/Html/Pc_Product_SimexExtremeTrekker2.htm)
would be better only having 2 rows like the ET

http://www.procomp.com.au/Images/PcImg_SimexExtremeTrekker.gif (http://www.procomp.com.au/Html/Pc_Product_SimexExtremeTrekker.htm)
The extreme trekker 2 that you've shown here is the 36x12.5x15
That is the only size that has the 3 lugsdown the centre. All the other sizes only have 2 central lugs.

polly
12-07-2005, 08:34 AM
Sizes
29/7.50R15
35/11.50R15
36/11.50R15
36/12.50R15
35/11.50R16
36/11.50R16
36/12.50R16


comes in these sizes......

the ones with the 2 lugs in the centre are the ET

and they come in these sizesSizes
29/7.50R15
31/10.50R15
32/9.50R15
32/10.50R15
35/10.50R15
35/11.50R15
31/9.50R16
31/10.50R16
32/9.50R16
32/10.50R16
35/10.50R16
35/11.50R16

MattW
12-07-2005, 08:46 AM
The ET isn't available in 35x11.5x15 only the ET2 is. I own a set of ET2's in that size and they only have 2 central lugs. The only Centipede with the 3 lugs is the 36x12.5x15 or the 36x12.5x16

FireTruck
12-07-2005, 08:56 AM
I ran a set of the 35's for a while... as everyone has said, GREAT mud tire. Lugs are huge and voids are massive. On the rocks they tend to be a little hard, and the massive outer lugs bend over which wears the sharp edges real quick...

They are also very stiff in the sidewall. To really get them to work on a wrangler you need to run them on beadlocks and at pressures below 5psi (in my experience).

S.

MattW
12-07-2005, 09:01 AM
Yea thats what ive found as well. Really low pressures are the go. I used to run a set of Jungle Trekkers without the beadlocks but they never performed really well because i was too scared of going below 12psi and losing them off the rim

JEEP1
29-07-2005, 12:34 AM
yeh the et2s are only in a 35. 11.5 tyre