Outer Limits 4x4 Board

I couldn't just leave this thread without saying something, so here comes my $0.02AUSD. When I was looking into tyre configurations for the Feroza, I discovered that my current set are illegal because they are too small! Hehehehe. Add to that the fact that the spare is a different size... geez I feel like a criminal! "Book him Danno!"

Mind you, neither of these points came up on the RACV vehicle check or during the RWC test.

There are a lot of illegal tyre configurations on the road, and I it seems to be only the totally outragous configs that get pulled over... I think 'hoon' factor goes a big way to how the police treat ya. Most police seem to think uncovered tread is a big no-no though.

I plan to keep my tyres close to factory dimensions mainly so that I'm not stretching the loadings on the drive-train and engine. I reckon anything that can spin and articulate freely inside the wheel arch is fair game, I just hate any mod that cuts into my torque/acceleration.

pluse the 235/70r15s should make the speedo pretty close to accurate

Anyway.... enough of my pointless ranting.

*braces for a flaming*

DeVooluff wrote:
pluse the 235/70r15s should make the speedo pretty close to accurate

Just out of interest 235/70R15 are legal and fit within the 15mm ruling most (if not all) states apply.

...... waiting, waiting .........

BTW from what I've seen with new cars a spare with a different sized tyre would not be illegal. eg. my Mondeo comes with 205/50ZR16 tyres on allloys, but the spare is a 195/60VR15 on a steel rim from the factory. Plenty of cars have space saver spares too that are smaller in diameter and look like a wheelbarrow tyre! Quite often the tyres are speed limited to only 80km/h.

still waiting there david??? hmm maybe i can help you out...




















































































who farkin cares?!

murcod wrote:

DeVooluff wrote:
pluse the 235/70r15s should make the speedo pretty close to accurate

Just out of interest 235/70R15 are legal and fit within the 15mm ruling most (if not all) states apply.

...... waiting, waiting .........

BTW from what I've seen with new cars a spare with a different sized tyre would not be illegal. eg. my Mondeo comes with 205/50ZR16 tyres on allloys, but the spare is a 195/60VR15 on a steel rim from the factory. Plenty of cars have space saver spares too that are smaller in diameter and look like a wheelbarrow tyre! Quite often the tyres are speed limited to only 80km/h.

Anyone with a 4WD should care... if you go putting a smaller or larger spare on when in 4WD it can cause windup... be mindful of that.

And when are you most likely to encounter flats???

If you wheel that is.....

If you wheel..... be thankful you've got places to go where you live Croz.

Wind up may not be such a big problem with different sized wheels on the same axle. For a start the rear diff (unless locked) will be able to compensate- the effect would be no different to continually doing a circle in the direction of the smaller wheel with tyres of the same size. You shouldn't have four wheel drive engaged where you've got enough traction for wind up to occur anyway.

When I went "wheeling" with the other guys a couple of weeks back Sam's Cruiser got two flats with 33" tyres on it. He had to borrow Steve's 31" spare and drive out in 4WD with that on the rear- he didn't have a problem.

for a short amount of time.. theres not much to worry about... but i wouldnt do it long or often.. because it does cause damage... locked or unlocked... it will put more strain on the diff since they are both rotating at different speeds... and it adds up man. saw a jeep's diff explode and the entire axle shot out from under him while traveling at 55 mph.... unlocked! and i mean the entire axle shout out.... wheel, brake drum, rotors.. everything... and you know that thick, impossible to get of axle grease??? that shit was boiling! just running out of the axle housing like a river... if you have cvs.... not too much to worry about.. jus dont do it any longer than you HAVE to.. but i wont do it on a solid axle....

murcod wrote:You shouldn't have four wheel drive engaged where you've got enough traction for wind up to occur anyway.

Thats bullshit, have you never driven on rocks?

I can think of many places I have had low 4 engaged where I have full traction, but am never gonna get up it any other way. In these instances I am putting big loads on my driveline just getting forward motion happening, let alone having one try to turn faster to keep in a straight line as my spare is smaller.

Some of these areas are only short true, but there are cases where I have had to travel a few hundred metres before I get out of the rock.

Murcod wrote:Just out of interest 235/70R15 are legal and fit within the 15mm ruling most (if not all) states apply.

Smacks his forehead. I'm sure we've had this discussion before. The 14mm increase on the diameter for 235/70r15s means this is generally the largest tyre within the 15mm increase range. It's one of the reasons I settled on that size.

Croz wrote:

murcod wrote:You shouldn't have four wheel drive engaged where you've got enough traction for wind up to occur anyway.

Thats bullshit, have you never driven on rocks?

I'm having a good week with upsetting people....

The reason you engage 4WD on rocks is to get enough traction to climb them, correct? Plus it usually involves lifting wheels, wheel spin etc?

Doesn't sound like a high traction situation where wind up would occur to me?

Remember wind up is between the front and rear due to there being no central diff, as the the rear only has one smaller tyre the rear diff should take care of it without causing problems in the short term. As I said it's no different to the rear diff turning a corner with the same size tyres fitted.

That's the way I see it, anyone else feel free to comment. As I said last time I went out Sam got caught in exactly that situation and got out without a problem.

I dont think you are listening, I am not talking about small rocks, I am talking about areas that must be taken slowly as they are inclined, or bympy, this does not mean the wheels are off the ground.

In this instance the wheels are ramping up the incline, not hitting them at speed. If you dont go here in low 4 you dont get up, or you break something doing it. Next time I fish this area I will fotograph it, so you get the idea.

Why dont you ask your friendly cooper retailler if he thinks it is a good idea for anyone with a 4WD to have a smaller spare?

What about using low range 4WD with the front hubs unlocked for that situation (if you had a smaller spare fitted and were worried about windup)? From what you just described that might work?

Croz wrote:Why dont you ask your friendly cooper retailler if he thinks it is a good idea for anyone with a 4WD to have a smaller spare?

For a start he's not that friendly. And not a 4WD mechanic either.

Here's some interesting reading on large tyres:

http://www.outerlimits4x4.com/PHP_Modul ... hp?t=22740

Muddy999 wrote:One thing though, anyone who takes the word of someone on this forum as 'expert' testament is a fool.

They're not experts???!!!!!!


Damn!!!

well if everyone was trying to confuse the @#&^ out of me they succeeded.

not sure where to go now....but the yoha's are sounding good.