Are 33-inch tyres legal in Queensland?

33-inch tyres can be legal in Queensland, but ‘33s’ is not a legal size category. For eligible light vehicles, the normal allowance is up to 50 mm more tyre diameter than an applicable Australian manufacturer-designated tyre. The vehicle category, prescribed diameter method, combined lift, wheel track and physical clearances all matter.

This guide covers light vehicles up to 4.5 tonnes GVM. The off-road tyre and lift allowances discussed below concern MC, NA and NB1 vehicles. Check the vehicle's category and approval records rather than assuming that every vehicle marketed as a 4WD qualifies.

Sources checked on 13 November 2026 include TMR's February 2026 minor-modification guide, September 2025 tyre-diameter instruction and December 2025 LS9/LS10 codes. These are the current versions linked by the official publication records, rather than older PDFs still appearing in search results.

What is the biggest legal tyre size in Queensland?

For an eligible MC, NA or NB1 vehicle, TMR's minor-modification guidance permits an alternative tyre up to 50 mm larger in overall diameter, or 26 mm smaller, than a tyre designated by the manufacturer for that vehicle. Passenger cars, derivatives and other covered soft roaders have a different increase limit, normally 15 mm under that guidance.

There is no single ‘biggest legal Ranger tyre’ or ‘biggest legal HiLux tyre’ based on the badge alone. Establish the applicable Australian manufacturer designation first. TMR accepts evidence such as the original placard, owner's manual or vehicle manufacturer information. Do not borrow a larger tyre from an overseas specification.

The diameter allowance is only one condition. An alternative tyre must also have a suitable rim, adequate load and speed ratings, road-use suitability, coverage and clearance. Speedometer accuracy must be maintained. A size within the diameter allowance can still fail another requirement.

How do you calculate the legal tyre diameter?

Use TMR's tyre outer diameter instruction. It distinguishes passenger-car and light-truck tyres and specifies the accepted design-new or UN Regulation methods.

• For passenger-car tyres, the instruction refers to the Tyre and Rim Association of Australia design-new overall diameter or the calculation and tables in UN Regulation 30.
• For light-truck tyres, it refers to the calculation and tables in UN Regulation 54, with equivalent design-new values from the tyre and rim manual acceptable.
• Do not use a ‘maximum grown’ dimension as though it were the design-new value.

Our vehicle articles also show nominal arithmetic from the sidewall code. That is useful for comparing packages, but it is not a Queensland legal pass/fail calculation. A tyre maker's measured product diameter is useful for clearance; it does not automatically replace TMR's prescribed method either.

A worked example from TMR

TMR's instruction uses an LT265/75R16 traction-tread tyre with an 810 mm design-new diameter. Adding the permitted 50 mm gives an 860 mm diameter ceiling for that worked example, subject to all other conditions. The same instruction distinguishes its highway-tread value from the traction-tread value.

Simple sidewall arithmetic gives about 803.9 mm for 265/75R16. That difference shows why an online calculator or a ‘33-inch’ sales label cannot settle this question. The 860 mm result belongs to TMR's worked example; it is not a universal ceiling for all 4WDs.

How much lift can you have without a mod plate?

For eligible off-road 4WDs in categories MC, NA and NB1, TMR permits up to 75 mm combined lift without certification, testing or specific approval, provided all the stated requirements continue to be met. The components have separate limits.

The certified component limits are not amounts you can simply add together. For example, 100 mm suspension, 25 mm tyre lift and 50 mm body lift total 175 mm, which exceeds the 150 mm limit. The body-block restriction also tightens when suspension lift exceeds 75 mm.

Is a two-inch lift the same as 50 mm?

Two inches is 50.8 mm. A kit's ‘two-inch’ name does not establish its actual installed lift or legal compliance. Confirm the resulting height and retain the kit and installation details. Tyre lift is half the increase in diameter, not the full diameter increase.

Are 35-inch tyres legal with engineering in Queensland?

Do not assume a mod plate makes 35s legal. The current LS9 design code still limits the tyre-diameter increase to 50 mm for the eligible categories. LS10 covers modification in accordance with an LS9 design. The codes also impose component, lane-change and ESC requirements.

If the exact proposed tyre exceeds the normal diameter allowance, an ordinary LS9/LS10 lift certification does not solve that excess. TMR explains that only it can approve specific modifications outside the available codes, with separate eligibility and safety considerations. Approval is not guaranteed.

A documented second-stage-manufactured or pre-registration conversion is a different approval situation from fitting tyres and suspension to an already registered standard ute. Obtain the approval documents for the exact vehicle and configuration before relying on an advertised ‘street legal’ package. Interstate modification certification is not automatically recognised in Queensland.

What wheel offset is legal in Queensland?

TMR's minor-modification guide permits eligible off-road 4WD and goods vehicle track to increase by no more than 50 mm beyond the manufacturer's maximum for the particular model. The passenger-car allowance is different, and the off-road allowance does not apply merely because an MA-category vehicle has four-wheel drive. Track must not be reduced below the manufacturer's standard specification.

With unchanged hubs, reducing offset by 15 mm on both same-width wheels increases track by 30 mm. Moving from +40 to +25 therefore describes a geometric change; it does not establish the legal budget unless the original and maximum manufacturer track are known.

Flares may help cover a tyre. They do not increase the track allowance or authorise a bigger tyre diameter. Check both axles separately, especially if the vehicle has a replacement axle, track-correction system or existing approval. TMR also specifies a restriction on front offset for diagonally split braking systems unless the manufacturer specifies an alternative.

What else must the package satisfy?

Before ordering, obtain the applicable manufacturer tyre designation, the tyre's accepted design-new diameter, exact wheel part number, rim-width approval and load/speed requirements. Have the installer check both steering locks and the full suspension movement with the complete package fitted. Tyres must not contact bodywork, brakes, steering or suspension, and steering stops must not be changed merely to make the tyres fit.

Keep the source dimensions, quotation, kit details and any approval documents together. A photograph of another ute, a wheel-brand fitment selector or a Nordak visualisation cannot substitute for those records.

Which vehicle guide should I read next?

Start with the Next-Gen Ranger biggest tyre guide, HiLux N80 guide, D-Max guide or 79 Series 33s versus 35s comparison. The full guide library covers the other vehicle generations.

For a vehicle registered in Victoria, use the Victorian tyre and lift rules. Once the technically suitable options are clear, see the wheel and tyre look on your own vehicle. Nordak produces visual concepts, not fitment or registration approval.