To cross over or not

Submitted: Friday, Sep 14, 2007 at 08:55
ThreadID: 49643 Views:1963 Replies:6 FollowUps:2
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Morning All,

I am about to rotate the tyres (BFG 285/75/16 ATs) on my 80 series as the rears are showing more wear and tear than the front ones.

I have heard different opinions on whether you should cross them over or keep them on the same side.

Any thoughts, or does it really make no difference?

Cheers,

Matt.
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Reply By: Member - MrBitchi (QLD) - Friday, Sep 14, 2007 at 09:03

Friday, Sep 14, 2007 at 09:03
The reason you cross over the fronts when they go on the rear is so the 'heel-toe' feathering, which is cased by braking, is worn off so the tread blocks become square again.
Standard rotation pattern for a 4B is the rears stay on the same side and come to the front, the fronts cross over and go on the back. If the spare is included it takes the place of the right rear (the old left front) which becomes the spare.

The only time you don't cross them over is with uni-directional tyres.
AnswerID: 262019

Reply By: Member - Tonester (VIC) - Friday, Sep 14, 2007 at 09:05

Friday, Sep 14, 2007 at 09:05
I reckon cross over. Rotates opposite direction, tyres kinda even up any different wearing, longer life

Tone
AnswerID: 262020

Follow Up By: Member - Stephen M (NSW) - Friday, Sep 14, 2007 at 10:09

Friday, Sep 14, 2007 at 10:09
Hi Tonester, I just had new tyes fitted to prado, and his way of rotating is (not including spare as mine is different size) first rotation !! front drivers across to passengers rear, passengers front to drivers rear, then on the second rotation back to front on the same sides then back to step one again for third roation and so on. He said this is vital for the 90 series prado's as they feather out on the passengers front so this will even the wear up over the life of the tyre.Thats his way anyway. Bob Janes Penrith Regards Steve M
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Reply By: Member - Matt M (ACT) - Friday, Sep 14, 2007 at 09:19

Friday, Sep 14, 2007 at 09:19
Thanks guys. I will go with your suggestion John.

Matt.
AnswerID: 262022

Reply By: Alan H (Narangba QLD) - Friday, Sep 14, 2007 at 12:55

Friday, Sep 14, 2007 at 12:55
The anti crossover argument is that the plys settle in or bed down from going in one direction and if suddenly rotated the other way delamination can occur.

There may be some merit in this!!!

Personally I never rotate - excessive feathering is the result of hard cornering or toein problems. - it needs an alignment. I have also never experienced delamination in a million plus 4WD kms
AnswerID: 262057

Follow Up By: Member - Oldplodder (QLD) - Friday, Sep 14, 2007 at 16:18

Friday, Sep 14, 2007 at 16:18
Have had a couple of friends who had tyres delaminate after a cross over rotation.
All we can put it down to, and this is a guess, is that they did it each time the night before hitting the road. i.e. That were doing 100k/hr on the rotated tyres.

While the rest of us who do the rotate/crossover do it a week or two before we go and reckon that week or so driving at 60km/hr around town lets the plies settle in.

Any other ideas :o)
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Reply By: Robin Miller - Friday, Sep 14, 2007 at 13:40

Friday, Sep 14, 2007 at 13:40
Hi Matt

Yep bottom line is to rotate them thru all positions as often as possible (not uni's) and hence no specific issue wears itself into tread anywhere.

Mine get rotated about each 1000km in practise which is probably more than most , maybe thats why the silly things won't wear out.

Robin Miller
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AnswerID: 262061

Reply By: Mainey (WA) - Friday, Sep 14, 2007 at 18:11

Friday, Sep 14, 2007 at 18:11
I'm positive my Michelins have arrows showing the direction they are to rotate placed on the sidewall.

Would be there for a reason, even if it's only so you know what way they were originally facing when placed on vehicle ??

Even so mine get put where-ever the tyre man puts them when they get changed around to give the spare some time on the road and even out the wear.
AnswerID: 262101

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