Choosing right offsets

[StanTheMan]

which state are you in

[Boost]

hes from NSW Stan.

[Babalouie]

Well...to answer the question, it really does depend on what you're after.

Ie, whether the \"right\" offset is one that dishes the wheel and pokes it right to the edges of the wheelarches, or one that looks normal

[StanTheMan]

OK offset is great so is the & 7 inch at the front. But running different width wheels Front & rear in NSW is a No No unless maybe you get some engineer to sign it off for you.

8 inch could be a little wide too but then again who cares its only the wheels.


http://www.rta.nsw.gov.au/registration/ ... 9_rev4.pdf


ok so maybe you dont care about the above crap.

as far as fitmeont goes......I cant recall now..... plenty of peeps runing 7 inch you may have to roll the fenders on the rear. But I dare say that you will not have a lot of room to play with. Especially if you decide do decrease the fset further.

[Mactype]

OK offset is great so is the & 7 inch at the front. But running different width wheels Front & rear in NSW is a No No unless maybe you get some engineer to sign it off for you.

err no, reading through the link you've provided it states

Front wheels shall be:
• No wider than the maximum permitted for rear wheels on your vehicle or 204mm (8 inches).
• No narrower than 70% of that fitted to the rear wheels.
• No narrower than a standard wheel fitted to the your vehicle as original equipment.

So staggered is ok if the fronts are no less than 70% of the rears width.

[StanTheMan]

OK offset is great so is the & 7 inch at the front. But running different width wheels Front & rear in NSW is a No No unless maybe you get some engineer to sign it off for you.

err no, reading through the link you've provided it states

Front wheels shall be:
• No wider than the maximum permitted for rear wheels on your vehicle or 204mm (8 inches).
• No narrower than 70% of that fitted to the rear wheels.
• No narrower than a standard wheel fitted to the your vehicle as original equipment.

So staggered is ok if the fronts are no less than 70% of the rears width.

correct but you need t get this certified by a signatory

I guess i was getting at minor changes without having to get them certified.

a little further down on page 4

under Additional requirements for replacement wheels
it says something about all the wheels must be the same size, width , offset & so on with the exception of spare wheels in case of emergency.

[Mactype]

correct but you need t get this certified by a signatory

I guess i was getting at minor changes without having to get them certified.

No, you only have to get them engineered if they are more than 26mm wider or total wheel and tyre combo is more or less than 15mm larger or smaller in diameter than the largest or smallest diameters on the tyre placard. Or alters track more than x amount.

So it would be legal to stagger with say normal width front and a inch wider rear without looking at engineering. Not that you'd do that but you could within the NSW law.

Personally I love my 15x8's

[StanTheMan]

Ok so you need to explain to me why it does not need to be signed off. To have staggered wheel size.

on page 3 it goes to the heading.

.

There are limits to the size of wheels that can be certified by a signatory.
these limits are as follows


....front wheels no narrower than 70% of hat fitted to the rear

Nowhere is the staggering the wheel sizes mentioned under the heading

\"minor Changes to wheels\"

then on page 4 under the heading

Additional requirements for replacement wheels

.....all wheels & tyres fitted to an axle must be the same carcas construction, diameter,offset , width........

I admit English is my 2nd language. But to me that says it needs to be singed off by a signatory

Personally I love my 15x8's :8

thats great

[Mactype]

why did I get involved .....
ok,

There are limits to the size of wheels that can be certified by a signatory.
these limits are as follows


....front wheels no narrower than 70% of hat fitted to the rear

This means that an engineer can't pass a set of front rims that are less than 70% the width of the rear.

Additional requirements for replacement wheels

.....all wheels & tyres fitted to an axle must be the same carcas construction, diameter,offset , width........

This is talking about one axle (note the wording \"an axle\") can be either front or back and states you can't put different sizes on each end of the axle to the other end. Your just getting confused that their comparing the front axle to rear axle, their not.

Whilst the minor changes to wheels section doesn't mention staggering specifically as long as you stay within the front rim width of 70% of rear and don't go over the 26mm wider than stock anywhere you don't need to get the vehicle engineered.

Hope that clears it up for you.

[StanTheMan]

thank you mactype


i stand corrcted

[Garry]

There was some mention of diagonally split braking and staggered wheel sizes. Do MX5's have that?