guzzla wrote:what KNOWN2 said.
also i think your car came out with radial tyres so its illegal to run bias ply tyres on the road.
you dont know road noise and vibrations till you drive with bias ply tyres like 'pedes.
Just to clarify a common misconception, it's actually not illegal to run Bias tyres on a vehicle even if it came out standard with Radials. They must be load and speed rated to suit OZ roads however, and be deemed suiitable for road use by the manufacturer.
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46 Wheels and tyres — size and capacity
The wheels and tyres fitted to an axle of a vehicle must be of sufficient size and capacity to carry the part of the vehicle's gross mass transmitted to the ground through the axle.
47 Pneumatic tyres generally
A vehicle built after 1932 must be fitted with pneumatic tyres.
48 Pneumatic tyres — carcass construction
(1) A vehicle with a GVM not over 4.5 tonnes must not have pneumatic tyres of different carcass construction fitted to the same axle, but the tyres may have different cord materials and a different number of plies.
(2) However, subrule (1) does not apply to a tyre being used in an emergency as a temporary replacement for a tyre complying with the subrule.
49 Pneumatic tyres — size and capacity
The size and capacity of a pneumatic tyre to be fitted to a vehicle must be decided using a cold inflation pressure that is not more than the lesser of:
(a) the pressure recommended by the tyre manufacturer; and
(b) a pressure of:
(i) for a radial ply tyre — 825 kilopascals; or
(ii) for another tyre — 700 kilopascals.
50 Tyres — defects
A tyre fitted to a vehicle must be free of any apparent defect that could make the vehicle unsafe.
51 Tyres for use on vehicles with GVM over 4.5 tonnes
(1) A tyre fitted to a vehicle with a GVM over 4.5 tonnes must be suitable for road use at the lesser of:
(a) 100 kilometres an hour; and
(b) the vehicle's top speed.
(2) This rule applies to a vehicle instead of the tyre speed category requirements in the relevant ADR.
52 Tyres — manufacturer's rating
(1) This rule applies to a motor vehicle if the vehicle:
(a) has 4 or more wheels; and
(b) was built after 1972; and
(c) has a GVM not over 4.5 tonnes.
(2) However, this rule does not apply to a tyre if the tyre:
(a) is recommended by the vehicle builder as suitable for limited use on the vehicle in special circumstances at a speed less than the speed applying to the vehicle under subrule (3); or
(b) is being used in an emergency as a temporary replacement for a tyre complying with this rule.
(3) A tyre fitted to a motor vehicle must, when first manufactured, have been rated by the tyre manufacturer as suitable for road use at the lesser of:
(a) a speed of at least:
(i) for a car with special features for off-road use — 140 kilometres an hour; or
(ii) for another car — 180 kilometres an hour; or
(iii) for another motor vehicle — 120 kilometres an hour; and
(b) the vehicle's top speed.
(Example for paragraph (a) (i)
A four-wheel drive vehicle.
(4) This rule applies to a vehicle instead of the tyre speed category requirements in the relevant ADR.
53 Retreads
(1) A tyre that is retreaded before the commencement of this rule must not be used on a vehicle if:
(a) Australian Standard AS 1973-1976 Retreaded Pneumatic Passenger Car and Light Truck Tyre or Australian Standard AS 1973-1985 Retreaded Pneumatic Passenger and Light Truck Tyre applies to the tyre; and
(b) the tyre was retreaded after publication of the Australian Standard; and
(c) the tyre was not retreaded in accordance with Australian Standard AS 1973-1976 Retreaded Pneumatic Passenger Car and Light Truck Tyre, Australian Standard AS 1973-1985 Retreaded Pneumatic Passenger and Light Truck Tyre or Australian Standard AS 1973-1993 Pneumatic Tyres — Passenger Car, Light Truck and Truck/Bus — Retreading and Repair Processes.
(2) A tyre that is retreaded after the commencement of this rule must not be used on a vehicle if:
(a) Australian Standard AS 1973-1993 Pneumatic Tyres — Passenger Car, Light Truck and Truck/Bus — Retreading and Repair Processes applies to the tyre; and
(b) the tyre was not retreaded in accordance with the Australian Standard.
Note The Australian Standards mentioned in this rule require various markings on retreaded tyres. These may include a speed rating less than the rating originally marked on the tyre.
54 Tyre tread
(1) A tyre on a motor vehicle must not have cleats or other gripping devices that could damage road surfaces.
(2) Except at tread wear indicators, a tyre fitted to the vehicle must have a tread pattern at least 1.5 millimetres deep in a band that runs continuously:
(a) across:
(i) for a vehicle with a GVM over 4.5 tonnes — at least 75% of the tyre width that normally comes into contact with the road; or
(ii) for another vehicle — the tyre width that normally comes into contact with the road; and
(b) around the whole circumference of the tyre.
(3) A vehicle must not be fitted with a tyre that has been treated by recutting or regrooving the tread rubber, unless the tyre was:
(a) constructed with an extra thickness of rubber designed for recutting or regrooving; and
(b) labelled to indicate the construction.
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Cheers,
Ryano
