suspension rules QLD ?

[gatto45]

Hey all got harassed by the law the other day about the suspension in my 80 series wagon.
Cant seem to find any info on the rules about suspension modifying in Queensland.
just wondering if anyone can help me out?
Cheers

[8UFF35T]

How big is your lift?

They say only 2inch suspension and 2inch body lift is acceptable.

[brad-chevlux]

you can't modify the bump stop clearance by more then 1/3, you can't modify or replace the bump stop with none standard parts.

http://www.transport.qld.gov.au/resourc ... icles2.pdf

Lowering or raising of vehicles

The road clearance of a fully laden vehicle must not be
less than 100mm measured at any part of the vehicle
other than the wheel rim or brake backing plates.
(This does not apply where a lesser clearance has been
specified by the manufacturer.)
When lowering or raising a vehicle body (front or rear),
the following additional restrictions are based on the
manufacturer's dimensions for the standard unmodified
vehicle while unladen:
• The ride height measured between the rubber bump
stop and the corresponding metal stop may be reduced
by no more than one third.
• The rebound travel measured between the rubber
rebound stop and the corresponding metal stop
(or the extension of the shock absorber for vehicles
without a rebound stop) may be reduced by no
more than one third.
Queensland Transport, All about modifications to motor vehicles, 2008
6 7
• Coil springs are to remain in locating seats on full
suspension droop without forcibly being removed.
In addition, the normal relationship between the front
and rear suspension heights must not be unduly affected.
Replacement springs (shorter or taller) must have the
same or greater load capacity as the original springs.
Suspension coil springs must not be shortened by cutting
or heating. Leaf spring suspensions must not be raised
by the use of extended shackles, adjustable metal plates
or by placing the leaf springs to the opposite side of the
axle. If lowering blocks are used, they must be either
steel or aluminium.
Airbag or air pressurised shock absorber helper springs
may be fitted in addition to the original suspension.
However, replacing some or all of the suspension system
with an air or hydraulic suspension requires specific
approval.

while i'm posting this again i might as well add the tyres/wheel bit in too.

Alternative rims and tyres
Many vehicle owners like to replace the vehicle’s original
rims and tyres with alternatives of different width,
diameter and profile.
The following sub-sections outline the legal requirements
for replacement rims and tyres fitted to a passenger car
or derivative, or an off-road passenger car (but not light
commercial), which will ensure your vehicle continues to
comply with Queensland legislation while allowing for
your individual preferences.
Low profile tyres
It is common practice for manufacturers to fit low
profile tyres to high performance motor vehicles as
standard equipment.
Low profile tyres (e.g. 50 series), replacing standard
profile tyres (e.g. 70 series or above), are normally fitted
in combination with rims of larger than standard
diameter to maintain the correct overall diameter of
the wheel.
A diagram of this concept appears below.
Queensland Transport, All about modifications to motor vehicles, 2008
18 19
The rim diameter may be varied from the standard size
but the overall diameter of the tyre must not vary by
more than +15mm or -26mm.
These limits have been set for a number of reasons.
Varying the overall diameter of tyres affects ground
clearance, centre of gravity, brake effectiveness, steering
geometry, performance and speedometer accuracy.
Generally, to meet these limits, 60 series tyres are fitted
to rims with a diameter 26mm larger than standard and
50 series tyres are fitted to rims with a diameter 50mm
larger than standard.
General conditions for
alternative rims and tyres
The rims and tyres must not protrude beyond the
bodywork of the vehicle, including flares, when viewed
from above with the wheels facing straight ahead. If the
vehicle was originally constructed with a portion of the
wheel protruding, the wheels must not protrude further
than originally constructed.
The tyre to rim fitting and the tyre to rim combination
must be in accordance with the Tyre and Rim Standards
Manual published by the Tyre and Rim Association of
Australia. Reputable tyre retailers should have this
information and be able to advise on the correct
combinations.
All rims fitted to an axle must be of the same diameter,
width and offset. They must not have a circumferential
weld other than that which attaches the outer rim to
the centre. All rims must have stud hole pitch circle
diameters suitable to the hub. Wheel nut tapers must
be appropriate to the wheel and must engage the thread
of the wheel studs for at least the same length as the
nuts provided by the vehicle manufacturer.
Slotted and elongated stud holes are not permitted.
The fitting of spacers or adaptors between wheels and
hubs, additional to those provided by the vehicle
manufacturer, is not permitted. The tyre and rim must
not foul wheel arches or suspension components under
any conditions. Steering limit stops must not be adjusted
to reduce the turning circle in order to allow the fitting
of the alternative rims and tyres.
The tyres must have a tread depth of at least 1.5mm on
every part of the tyre that touches the road and not have
any apparent defect that is likely to make the vehicle to
which they are fitted unsafe. It is not permitted to fit
tyres that have been treated by recutting or regrooving
unless the tyre has been marked by the original
manufacturer as ‘suitable for recutting or regrooving’.
Tyres
The maximum tyre width for a car or car derivative must
not be more than 1.3 times the vehicle manufacturer’s
widest optional tyre.
However, for an off-road passenger vehicle fitted with
front and rear beam axles, the maximum tyre width
must not be more than 1.5 times the vehicle
manufacturer’s widest optional tyre.
The nominal width of the narrowest tyre fitted to a
vehicle must not be less than 70 per cent of the nominal
width of the largest tyre fitted and never less than the
vehicle manufacturer’s narrowest optional tyre as
indicated on the manufacturer’s tyre placard.
Queensland Transport, All about modifications to motor vehicles, 2008
20 21
Speed and load ratings
The speed rating of all tyres must be:
• a speed of at least:
for an off-road passenger vehicle – 140km/h
for another car (sedan, station wagon etc.)
up to nine adult seating positions or a car
derivative – 180km/h
for another motor vehicle – 120km/h
• the vehicle’s top speed, if lower.
Load ratings of tyres must be at least equal to those
specified by the manufacturer on the tyre placard fitted
to vehicles made after 1972. For other vehicles, the load
rating of a tyre must be capable of carrying the part of
the vehicle’s gross mass carried by the tyre.
Tyre construction
Tyre tread compounds, patterns, ply ratings and
performance characteristics vary. Tyre construction
(e.g. radial) and size must be the same on the same
axle. Although it is recommended that the tyres are
identical (e.g. same brand and tread pattern), this is
not mandatory.
Vehicle track
Track is measured at ground level from the centre of the
tyre on one side to the centre of the corresponding tyre
on the opposite side of the vehicle. Front and rear track
differs on many vehicles.
The wheel track must not be reduced to less than the
standard track specified by the vehicle manufacturer
for the particular model of vehicle.
The track of a car or car derivative may be increased
by up to 26mm beyond the maximum specified by
the vehicle manufacturer for the particular model of
vehicle. Off-road passenger vehicles fitted with front
and rear beam axles, may have an increase in track
up to 50mm beyond the maximum specified by
the vehicle manufacturer for the particular model
of vehicle.
Wheel marking
Vehicles built on or after 1 July 1985 must be fitted with
original wheels or replacement wheels which
are indelibly marked in accordance with approved
standards.
These standards include:
• Standards Australia
• Wheel Industries Association (Australia)
• Technischer Uberwachungen Verein
• Japanese Industrial Standards.
Markings must include diameter, width, offset and the
manufacturer’s trade mark or logo and be located so
that they are readily visible when the wheel is correctly
installed on the vehicle.

[Spartacus]

Where does it say u cannot modify the bumpstops?

it says 1/3 travel between bumps/shock.

So can you lift the car 6" and adjust the bumpstop accordingly?

[BundyRumandCoke]

I think they would consider a substitute bump stop as a modification, or a modified bump stop. That means those of us driving GUs are not supposed to change our fronts over to 80 series ones.

[brad-chevlux]

Where does it say u cannot modify the bumpstops?

it says 1/3 travel between bumps/shock.

So can you lift the car 6" and adjust the bumpstop accordingly?

That quote is small section of a pamphlet that you can get from any Q/T office.

The info in it is again just a small section of the QLD Code Of Practice. It states in the COP that you can't modify or change the bump stops.

The COP can be bought from Q/T for a about $150

[Spartacus]

[ It states in the COP that you can't modify or change the bump stops.

sweet been chasing that info.