subi_man wrote:New sticky - please report any broken or outdated links
killa wrote:Looks good , still relies on individual state transport authorities adopting the guidelines but you could argue the point a little more successfully
Longranger1 wrote:Only for solid axle fourbies, IFS was 15mm.
That could have changed though. I have 265/65-17's as well and that was my take on it. The tyre blokes didn't want to fit them for legal reasons. This is/was Qld legislation.
Edit: Seems to be universally ignored though.
3.4 Wheels and Tyres
The overall tyre diameter can be increased to allow an increase of 7.5mm in vehicle height
for passenger vehicles and no more than 25mm in vehicle height for four wheel drive
vehicles (typically MC ADR category).
Tyres fitted to off-road passenger and light goods vehicles (MC, NA, NB ADR category) must
not be more than 50% wider than the vehicle manufacturer’s widest optional tyre. Tyres fitted
to passenger vehicles must not be more than 30% wider than the vehicle manufacturer’s
widest optional tyre.
The rim width must match the recommendations for the tyre fitted.
The tables of original tyres with the maximum allowable tyre and rim sizes in Clause 4.2
Non- Standard Tyres and Rims in the NCOP are applicable.
The wheel track of off-road and four wheel drive vehicles (MC, NA, NB ADR category) must
not be increased by more than 50mm beyond the maximum specified by the vehicle
manufacturer for the particular model. The wheel track of passenger vehicles, including four
wheel drives or all wheel drive vehicles certified as MA ADR category must not be increased
by more than 25mm beyond the maximum specified by the vehicle manufacturer for the
The wheels must be contained within the bodywork or mudguards (including flares) when the
wheels are in the straight-ahead position. Adequate clearance must be available between
the tyres and the vehicle bodywork.
Speedometer accuracy must be maintained for the selected tyre and rim combination to
within the degree of accuracy specified in ADR 18 where applicable.
3. Vehicle Category Codes:
Codes for vehicle categories and definitions are in Definitions and Vehicle Categories and can be found on web page: <http://www.infrastructure.gov.au/roads/motor/design/adr_online.aspx>
(The United Nations Economic Commission for Europe (UNECE) Vehicle Category Codes are also shown in brackets in the Table.)
MA - PASSENGER CAR - A passenger vehicle, not being an off-road passenger vehicle or a forward-control passenger vehicle, having up to 9 seating positions, including that of the driver.
MB - FORWARD-CONTROL PASSENGER VEHICLE - A passenger vehicle, not being an off-road passenger vehicle, having up to 9 seating positions, including that of the driver, and in which the centre of the steering wheel is in the forward quarter of the vehicle’s ‘Total Length.‘
MC - OFF-ROAD PASSENGER VEHICLE - A passenger vehicle having up to 9 seating positions, including that of the driver and being designed with special features for off-road operation. (See Definitions and Vehicle Categories for special features)
MD - LIGHT OMNIBUS - An omnibus with a ‘Gross Vehicle Mass‘ not exceeding 5.0 tonnes.
ME – HEAVY OMNIBUS - An omnibus with a ‘Gross Vehicle Mass‘ exceeding 5.0 tonnes.
4.3.3. OFF-ROAD PASSENGER VEHICLE (MC)
A passenger vehicle having up to 9 seating positions, including that of the driver and being designed with special features for off-road operation. A vehicle with special features for off-road operation is a vehicle that:
(a) Unless otherwise ‘Approved‘ has 4 wheel drive; and
(b) has at least 4 of the following 5 characteristics calculated when the vehicle is at its ‘Unladen Mass‘ on a level surface, with the front wheels parallel to the vehicle’s longitudinal centreline, and the tyres inflated to the ‘Manufacturer‘s’ recommended pressure:
(i) ‘Approach Angle‘ of not less than 28 degrees;
(ii) ‘Breakover Angle‘ of not less than 14 degrees;
(iii) ‘Departure Angle‘ of not less than 20 degrees;
(iv) ‘Running Clearance‘ of not less than 200 mm;
(v) ‘Front Axle Clearance‘, ‘Rear Axle Clearance‘ or ‘Suspension Clearance‘ of not less than 175 mm each.
Alternatively, a vehicle that meets the definition of CATEGORY G - OFF-ROAD VEHICLES under Consolidated Resolution on the Construction of Vehicles (R.E.3) of the United Nations Economic Commission for Europe and is in category M1.
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