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[noel]

Having just switched my tyres round (front to back) car has started tramlining.Have checked steering components and no evidence of play.
all tyres are of the same brand and size but the 2 i switched to the front are 12 months older than the others so obviously lower in tread but still plenty on them,could this be the problem .
any advice thanks Noel

[feeutfo]

Unusual, IME. The squarer profile given by a worn rear usually calms things down at the front.

Is the movement being felt as a pull through the steering wheel?

[noel]

Unusual, IME. The squarer profile given by a worn rear usually calms things down at the front.

Is the movement being felt as a pull through the steering wheel?

it appears to be chris, i constantly fight with the steering as it follows cambers. But if i switch them back again all is fine
tyre brand is primewell (budget tyres i know) but never had a problem with them)

[feeutfo]

Put them back on the rear I guess.

I wonder if the rears (that are now on the front?) are wearing unevenly? Is the tread the same depth across the width? Any shoulder wear is usually bad for handling.
I have no experience of age alone causing a problem. It's usually profile and construction related if the car is sound.

Pressures checked?

[noel]

Put them back on the rear I guess.

I wonder if the rears (that are now on the front?) are wearing unevenly? Is the tread the same depth across the width? Any shoulder wear is usually bad for handling.
I have no experience of age alone causing a problem. It's usually profile and construction related if the car is sound.

Pressures checked?

no uneven wear on any tyres and pressures are spot on.
thats the one thing i check always
guess i will be switching them back again and when tyres need replacing i will invest in another  better brand if funds allow 
Thanks for the advice chris 

[feeutfo]

Odd one. I would expect to see a physical difference between them.

But if age is the only difference...



The rear is usually less affected by tram lining. So I'd expect the car to steer from the rear a little with the "bad" tyres on the back again. So you may find that the car then needs a slight correction, with no pull sensation on the steering. As if there's a strong side wind on the rear only. Was this evident before the swap...?

[noel]

No but i will switch them back again & see what happens just wondering if the older tyres are going harder with age ,as there is a difference with noise levels when switched
Thanks again chris

[noel]

Quick update switched just the nearside front to back again (so newer tyre on front) and all seems well.But i have noticed front nearside wishbone front bush has slight movement in it ,so i guess this is the problem. 2 new wishbones then i will have to get

[feeutfo]

Front and rear have different suspension set ups. McPherson strut front and trailing arm rear. So by swapping wheels for and aft, the effect is to introduce a tyre worn to a different set up to the new axle.
Fussy as the omega is at the front, not many cars will tolerate swapping wheels without some noticeable effect. So the differently worn rears can quite easily pull worn bushes in a direction that the driver isn't used to.

Poly front bushes give very good results with a tiny trade off in harshness that's well worth paying for the extra stability in handling.
But it's arguably pointless fitting them if the rearward bushes are close to fubar. Plus be aware the wishbone ball joints won't see out two sets of bushes.
So ime the ultimate solution is to fit poly to new lemforder bones, job done. But obviously taste and wallet concerns come into it.

[noel]

Thanks for all your advice chris . Will wait till rear tyres get a bit lower then change them then,unless wishbones get worse in the meantime