Looking into getting some Revolution Millennium wheels.

Car is a Mk2 Sierra hatch and I assume that the arch clearance is the same as a Saph ?

8x17 rear

7½x17 front

Anyone know best offsets for arch clearance ?

Widest rear tyres I could get away with ?

Car has just been painted and has non rolled arches, would like to avoid rolling them !

Will have a 6 degree beam also if that makes a difference ?

 

Will depend on running gear.. 2 or 4wd?

 

Mark i used to run focus rims which are et 42 8j rim with std height suspension with 215.35.18 could run wider on back 225. poss even a 235.

Paul

 

Did ET 42 fill the arches OK ?

It's 2WD with 6 degree Cosworth beam and 3 door Cosworth hubs / ARB

Will 235/40/17 fit on the back ?

I just sold my RS 7 spokes that were 7½ x 17 et 38 with 215/40/17 they filled the arches nicely but were crap for brakes

EDIT for pic,

Do you reckon white wheels would be too much with frozen white?

Got a hankering for silver as it's more period...

Before and after pics

 

silver would be good.

 

Defo silver. The only colour choice for alloys.

 

No one know if 235/40/17 or 235/35/17 will fit on the back ?

 

Every car is different:
Ride height
Spring rates
Beam
Tyres used
Do you have 3 people in the back, or none.
Etc
All will have an influence on whether tyres will catch

 

A 6 degree rear beam will make a difference. The wheel will go more straight into the arch, making the change of touching the arch bigger.

This is the back on my 4x4 sapph with 6 degree rear beam and 17x8 wheels, ET 35 and 215/40 R17 tyres on the bumpstop. The arches are rolled and I could get my finger in between the arch and the tyre.

 

love that sierra on Hocks I have exactly the same on my saph

 

i ran 215/45/17's 8x17's on the back of my sierra with an ET of 25

fitted perfectly

 

here we go

these are the pictures you might be looking for

https://passionford.com/forum/restor...eaking-11.html

 

Thanks for that

What was the clearance like on the back of the wheel when it was on the bump stops ?

Looks like the 6 degree beam makes a big difference to camber change!

I would like to be able to use car fully loaded without rubbing.

ET38 would pull them in a bit, might even get away with ET40 with the 6 degree beam ...

 

Thanks for finding that for me.

Did they rub much mate ?

 

On the fronts plenty, but on the rears not at all, I ran with no springs to make sure there was no clearance issues

That was a Sierra beam, xr arms for the arb mounts, escos 22mm arb, Granada's shafts and a Swedish 7.5" Sierra estate 3.14:1 diff

This was over 10 years ago when I fitted it all up and for 3 years it was my daily driver

 

I didn't really check the clearance on the inside of the tyre, but I think there was quite a bit. With higher offset wheels you should have a bit more room. BTW, it should have read:"The arches are rolled and I could NOT get my finger in between the arch and the tyre."

 

Bugger !

Thanks for all the help.

I reckon the best option would be to just by a front set of 7½x17 ET38 with 215/40/17 tyres, then try them on the back and measure for clearance to see what I can get away with...

 

I ran 8x17 et 37 with a 235/40/17 without any issues for years on the rear of my Saph. The only thing that suffered was the arch liner when I had 3 in the back and driving it hard.

 

What make were the tyres mate ?

 

I ran Toyo T1r and Goodyear Eagle F1.

I have Kuhmo V70a for it now, that will need the arches rolling and the inner arch massaging a little as there 9 1/4 wide even as there so square.

Fitting 235s on the back was one of the best things I did, at least it gave it a fighting chance of finding some grip.

 

But was that also on a 6 degree rear beam?

 

That was without a proper beam! I am looking forward to driving it with a proper beam and even wider tyres this time!

 

These are what I am fitting this time around:

 

They are what I'm running front and rear on track

 

How are they Dave?

 

Let us know how you get on with 6 deg beam and 8x17's

 

Dave Ridgey and Frazer are already running that set up, they would be best to comment or else you might be waiting a while for my answer Mark.

 

What tyres and size are they?

 

As Ridgey says. there are so many factors that affect it. Brake bell thickness is another one. I measured 4mm difference iirc between a cast disc and a aluminium bell.
I'm running ET35s with 235 track tyres that measure up about 240+. Ally bells, 6 degree beam set at 1.5degree of camber. Arches have been rolled.

 

Top Info

How much room do you have on the insides of the wheels ?

 

The backs are fine for clearance on the strut inside.

 

I like the balance of the 235 all round, plenty of turn in grip.
I was well pleased when they didn't rub on the front
Had to get 6" long 550lb front springs so I could raise the spring platform above the tyre for clearance.