all my tyres are worn on the inner edges, is this a common thing for the saphs..??

its 2wd, with Koni's..not sure what springs but lower, and Diamond cut 7 spokes.

As ive only had the car a couple of months, i dunno if they have been swapped front - rear at some point.

Any advice as where to get new rubber an what to put on..?? The N/S front catches the arch so i might look at swapping the 7 spokes for some 16's or even back to the original ford ones..

 

No, i'd suggest to get the allignment checked over. Lowering could very well have upset the geometry..

 

It's likely the rear tyres were on the front before you got the car, due to the wear on them.
The front is toeing out, so a simple alignment check will rectify this.
First though I would check all bushes etc for wear, if worn put poly ones on, then get tracking adjusted, low ride height will cause more camber, but it is toe that kills inner edges not camber.
The rear suspension has a natural toe out, which is a disaster for performance, but some inexpensive R&B shims correct some of this, not all by any means, but a worthwhile improvement for around £10.
tabetha

 

mine wheres tyres on the inside, but its lowered a bit, its got some fair camber on the back, so that would explain it, the front it perfectly in track and it takes the inners off a touch.

 

soz for bein a bit dim, but where do i get these from, an what do i shim..lol

 

Camber will NOT kill the inner edges, toe does this as it present a sharp edge of tyre to the road, camber extremes still leave the whole width of the tyre sitting evenly pressure wise across it's width.
I ran 3 1/2 degrees on my last sierra, absolutely normal tyre wear, and I did a lot of heavy towing which further pushed the rear down giving more camber.
The shims to which I refer can be got from Mike Rainbird off here, he has a website
r&bmotorsport.co.uk
They are very simple to intall come with instructions will take less than an hour, but here it is, basically they where the rear hub is held to the arm with it's four bolts these are loosened(not taken out) and the shim is put at the rearmost edge of the hub so that the upper and lower rearmost bolt pass through the cutout in the shim and sandwich it between the hub and backplate, this gives a slight tilt on the hub inwards at the front so taking off some toe.
tabetha

 

did fit those, and it wasn't a straight fit I had to cut them in 2 pieces because the holes didn't line up. After that a lot of fiddeling mount them properly But, the toe is fine now

 

If you have some problems with the inner side of the tire you will have too much camber, this can be sorted out with some kind of plates. It is a common problem on lowered ones.. Wont say there are problems with the toe, cos this would show some wear the over the entire surface!

 

Toe will not at all wear entire width, just the edge that is most present to the motion of travel, as a resistive force.
Even on a boggo std car if the toe is out too much it wears ONLY the inner edges, with camber the tyre is still flat on the road as the sidewall takes up the difference as the tyre can slant this way, as it is direction of rotation, and deflection but not so when you are trying to drive down the road with your two front wheels both pointing out too much.

 

I had negative camber issues on my ST 24 which is also lowered, and running 19 inch wheels. That used to wear tyres on the inner edge, and completely destroy both tyres at around 5000 miles. this problem persisted until correct camber was acheived.

 

Once I had a toe problem on one of my cars, and the tire where worn over the entire width and that pretty fast. they looked like they had covered 50000miles after 3000 miles and that just with a bit too much toe in. and all my cars with neg camber show some wear on the inner edge

 

Read the other posts and what most people are saying is right i think mate. its the camber due to lowering. if you replace tyres b4 sorting this you will eat them again. had two saff cos replicas based on 2.0 pinto engined sierra and they were both lowered and both ate the inner edge of tyres. so far as im aware its recommended that you dont go lower than 25mm with a saff. hope you get sorted buddy