Tyres
Can you fit 33-inch tyres on a 2021-on Mazda BT-50?
Considering 33s on a third-generation BT-50? Check factory wheel width, tyre diameter, model-specific clearance and the full cost of the proposed upgrade.
Technical review by Nordak on 23 September 2026.
Do not assume 33-inch tyres will fit a third-generation BT-50 with its factory wheels and a suspension lift. The rim width needs to suit the exact tyre, and clearance needs to be checked on the Mazda itself.
This guide covers Australian third-generation 4x4 BT-50s sold as MY2021 onwards. It excludes the earlier Ford-related BT-50 and any dealer or aftermarket conversion whose wheel and suspension package differs from the ordinary vehicle.
Identify the wheel before choosing the tyre
Mazda's published brochure includes 255/65R17 tyres on 17 x 7 wheels and 265/60R18 on 18 x 7.5 wheels. Treat those as documented examples and check the markings on your own wheels.
A 17-inch tyre cannot mount to an 18-inch wheel. Less obviously, not every 17-inch wheel is wide enough for a proposed 33-inch-class tyre.
The Toyo Australian specification table gives its LT285/70R17 an approved rim range starting at 7.5 inches. The cited seven-inch Mazda wheel falls outside that range. Get the current specification for the exact tyre being quoted.
How large is the change?
Using nominal size calculations:
| Starting size | Calculated diameter | Increase to 285/70R17 |
|---|---|---|
| 255/65R17 | 763.3 mm | 67.5 mm |
| 265/60R18 | 775.2 mm | 55.6 mm |
| 265/70R17 | 802.8 mm | 28.0 mm |
The proposed 285/70R17 calculates to 830.8 mm, or 32.7 inches. Manufacturers' measured dimensions vary, so use these numbers to understand the scale, then use product specifications for the actual decision.
The last row is a size comparison, not a factory-size claim or an approval for 265/70R17.
Does a D-Max example prove BT-50 fitment?
No. Ask for evidence that names your Mazda, wheel specification and tyre. Even where vehicles share underlying engineering, an example with different bodywork or equipment is not a completed clearance assessment for your ute.
A sensible installer should be able to explain where the tyre travels when steering and when the suspension compresses. A straight-ahead photograph cannot answer that.
A lift is only one part of the proposal
Ask whether the quoted setup needs different wheels, changes around the wheel opening or adjustments beyond ordinary alignment. Include the spare-wheel location in the discussion.
Have clearance checked with the accessories and load the vehicle normally carries. A BT-50 that is empty at installation and later receives a canopy should not be treated as two unrelated projects.
Do not accept a generic 'two-inch lift and 33s' invoice. You need an exact specification with a clear scope of work.
Which route makes sense?
Daily driving and weekend gravel: we would first compare appropriate all-terrains in an approved current size. That separates the need for a different tread from the wish for a taller stance.
Touring build: settle the equipment and load plan before choosing construction and size. Request a quote that includes a workable spare.
Appearance-led 33-inch build: include wheels, installation and any approval work in the budget from the start. If the required changes exceed what you want to do, compare a smaller tyre before ordering.
Refer to your registration authority's modification process rather than assuming a package is acceptable because it is sold online.
For tyre models, read the BT-50 all-terrain buying guide. See the intended look on your Mazda, then have the physical combination assessed before purchase.