Serious Muddies, Serious $$$, 80 Auto 4500

Submitted: Friday, May 12, 2006 at 21:18
ThreadID: 33842 Views:1899 Replies:3 FollowUps:1
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Hi guys,
Following on from my recent post re: Simex muddies, I have come to some decisions about whether to move up to 35's on the 80 series auto (4500).

Basically, I've decided to stick with 33's, as 35's need:
More than 2-3inch suspension lift that l have,
35 ET Centipede's are not ADR compliant as they do not have a high enough speed rating.
35's require an eng cert to keep insurance company happy.
35's really need diff or transfer case gears modified to maintain acceleration & engine braking ability.

So l will stick with a near equiv diameter as the 285/75 GY MTR's l currently run as daily & offroad tyres and get a 2nd set of rims for the simex's.

I have read several articles from the web. Some maintain that the Jungle Trekkers are noisy and don't clear the mud as readily as ET's and there is differing opinion on the later grip of both.
On a Queen B'day trip to Butcher country, l was sold on ET's when a mate could get up & down the Nobs trk and Grimme trk just aired down, whereas l had my MTRs at 16psi with chains on the back and it was like an ice rink.

So l'm undecided as to whether to go ET's 32x10.5-16 (equiv 280/75-16), which is slightly larger than my MTR's of the same size or 33x10.5-16 JT's.

Where are the best prices in Melbourne area? My best prices are:
Rims (Dynamic Rock Crawler) $89 (Others $110 to $135)
ET's 32x10.5-16 $315
JT's 33x10.5-16 $340
Simex Tubes $35
2nd Air $195+100 Fitting
2nd Air $220+45 Fitting

Any better deals you know about??

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Reply By: Kiwi Ray - Saturday, May 13, 2006 at 07:30

Saturday, May 13, 2006 at 07:30
Hi Bob
Tyres are a variable and there are no defined rule rules as to which is better. It is so much dependent on the truck involved and how it is set up in the suspension area and how it is driven.
The soil or sand type that you are driving on has an even bigger impact on the tyres ability to maintane traction
The ability of tyres to clear them selves is another variable, soil type how wet, clay or sand content of soil. Grass also plays havoc with traction, here it is driving style that wins out.
Tyre pressures play an important part of the drivability of a tyre.
All mud tyres are noisy on the road, the more aggresive the more noise
some mud tyres have very soft compounds therefore will not last very long on the blacktop
rock crawling tyres havean even softer compound.
I run 3 types of tyre in competition, 35 centipedes,34x 12.5 jungle 2, Kumho 833, and my tyre pressure will be any where from 8 to 20 psi .
Check out what tyres are running at the OBC and the Malaysian Rain Forest
or the tough truck challenge. experience has made the choice for chaps and also for myself.
An 80# LC can easily handle 35 tyres you have morre power than yoiu can use off road.
Just a tip speed is not the be all and end all it is the ability to acheive the challenge with as less fuss as possible and the least stress on the truck, it has to take you home.
AnswerID: 172434

Reply By: GaryInOz (Vic) - Saturday, May 13, 2006 at 11:12

Saturday, May 13, 2006 at 11:12
Procomp in Narre Warren did the Secondair install for $45/wheel a couple of years ago, they also sell them (one of the original distributors, not just a retailer).

Seemed to know what they were doing with the installation, and explained how to refit tyres in the bush should you need to.

If you are a member of a VAFWDC affiliated club I think they will also give you a discount.

AnswerID: 172474

Reply By: Truckster (Vic) - Saturday, May 13, 2006 at 11:42

Saturday, May 13, 2006 at 11:42
you may find 33's will need engineers too.. they do on a GQ... 15mm bigger than standard.
AnswerID: 172479

Follow Up By: Truckster (Vic) - Saturday, May 13, 2006 at 13:39

Saturday, May 13, 2006 at 13:39
OWP I think it is are doign free rims with any procomp tires sold.
FollowupID: 428108

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