Quick answer: Australian Isuzu D-Max utes run 255/65R17 (SX, LS-M) or 265/60R18 (LS-U, X-Terrain) tyres on a 6×139.7 wheel pattern with a ~100.5mm centre bore. Set the placard cold pressure — commonly around 33 psi for 17-inch fitments. Every D-Max carries a full-size underslung spare. Confirm all figures against your own placard and handbook.
On this page
- What tyre size does an Isuzu D-Max take?
- What are the D-Max’s wheel specs (PCD, offset, bore)?
- What tyre pressures should a D-Max run?
- Does the D-Max have a full-size spare?
- Tyres, load, GVM and towing
- What are the best replacement tyres for a D-Max?
- How much do D-Max tyres cost in Australia?
- D-Max tyre FAQ
The Isuzu D-Max is one of Australia’s top-selling 4×4 utes, bought as much for work and touring as for the school run. It shares its platform with the Mazda BT-50, so much of this guide applies to both. Because a D-Max spends its life carrying, towing and heading down dirt, the tyre and load figures below matter more than on a passenger car. Treat every number as a 2026 guide and let the placard on your door frame and your handbook have the final say.
What tyre size does an Isuzu D-Max take?
The current RG-generation D-Max (sold here from 2020) uses two main tyre sizes, split by trim level and wheel diameter:
| Variant | Tyre size | Rim | Fitment |
|---|---|---|---|
| SX | 255/65R17 111S (A/T) | 17 × 7.0 | Steel |
| LS-M | 255/65R17 | 17 × 7.0 | Alloy |
| LS-U, X-Rider, X-Terrain, Blade | 265/60R18 110H | 18 × 7.5 | Alloy |
The SX leaves the factory on a highway-biased all-terrain with a steel rim — the toughest, cheapest-to-replace combination, which is why tourers often start there. Note the load index: the 17-inch tyre is an 111 (around 1,090 kg per tyre) and the 18-inch is a 110. For a 3.5-tonne tow vehicle, never fit a replacement below the placard load index; our explainer on LT versus P-metric construction explains why ute tyres are built differently from car tyres.
What are the D-Max’s wheel specs (PCD, offset and bore)?
The D-Max uses a 6×139.7mm bolt pattern — the six-stud fitment shared with the HiLux, Ranger, BT-50 and LandCruiser — with a centre bore of about 100.5mm and M12×1.5 wheel studs. Sharing a bolt pattern does not mean every six-stud wheel fits: offset and centre bore still have to match.
| Spec | D-Max (RG) — guide |
|---|---|
| Bolt pattern (PCD) | 6 × 139.7mm |
| Centre bore | ~100.5mm (hub-centric) |
| Offset (ET) | ~ET33–ET38 |
| Stud thread | M12 × 1.5 |
| Wheel nut torque | ~110 Nm (confirm handbook) |
If the bore on an aftermarket wheel is larger than 100.5mm, use hub-centric rings so the hub — not the studs — carries the load; our centre bore guide and PCD guide show how to measure yours. Offset decides track width and clearance — see offset and backspacing before you buy a touring rim.
What tyre pressures should a D-Max run?
Set pressures cold to the placard figure. As a guide, the 17-inch fitment runs around 33 psi front and rear unladen, with the 18-inch often a little lower:
| Condition | Guide pressure |
|---|---|
| 255/65R17, daily/unladen | ~33 psi (230 kPa) front & rear |
| 265/60R18, daily/unladen | ~29–33 psi (follow placard) |
| Loaded / towing | Raise rears per handbook (often +4–8 psi) |
| Sand driving | Drop well below road pressure — see guide |
Where sources disagree, the placard wins — our placard versus sidewall explainer covers why. When you load the tray or hook up a van, raise the rear pressures per the handbook’s laden figure; our caravan-towing pressure guide works through it. Heading off the bitumen, airing down transforms grip and ride — see sand-driving pressures and reinflate on hard surfaces afterwards.
Does the D-Max have a full-size spare?
Yes. Every Australian D-Max carries a full-size spare slung under the tray — a genuine advantage over SUVs with space-savers, and essential for remote travel. On the SX that spare is typically a steel wheel; higher grades usually carry a matching alloy. After upsizing your road tyres, remember the under-slung spare is still the original size and may no longer match — something our spare-matching guide covers.
Two things owners forget: the spare’s own pressure (check it when you check the other four) and its age. A spare that has hung under the ute for a decade may be unsafe even with full tread — see how old is too old for a spare. For the Simpson, Cape York or the Canning, one spare is rarely enough; read whether you need two spares.
Tyres, load, GVM and towing
The D-Max’s headline numbers — 3,500 kg braked towing, a GVM around 3,100 kg (SX, the heaviest) and a GCM near 6,000 kg — all rely on tyres that are up to the job. Kerb weight is about 1,865 kg on the SX. If you fit a GVM upgrade, your legally required load rating can change; our guide on load ratings after a GVM upgrade explains the trap. The towing rules themselves — load ratings, GVM and GCM — are set out in tyre rules for towing. Towing and heavy loads also shorten tyre life markedly: see how towing wears tyres.
What are the best replacement tyres for a D-Max?
Match the tyre to how you actually drive — most D-Max owners are better served by a quality all-terrain or a long-wearing highway tyre than by an aggressive mud-terrain. Our A/T vs H/T vs M/T comparison is the place to start.
- Mostly sealed roads, some dirt: see the best 80/20 tyres.
- Towing a van or trailer: our best towing tyres for a dual-cab.
- Maximum tread life: the longest-lasting ute tyres.
- On a budget: the best value dual-cab tyres.
If you tour seriously, consider whether you need LT-construction tyres for their tougher sidewalls, and if you’ve added a lift, our picks for a 4WD with a two-inch lift. Avoid the common 4WD tyre mistakes that cost owners money.
How much do D-Max tyres cost in Australia?
Prices move constantly — treat these as 2026 guides and get a live quote. Per corner, fitted and balanced:
| Size | Highway/budget | Premium A/T |
|---|---|---|
| 255/65R17 | ~$180–$260 | ~$280–$400 |
| 265/60R18 | ~$210–$300 | ~$320–$460 |
4WD tyres cost more than passenger rubber for the same diameter because of the heavier construction — our comparison of 4WD versus passenger tyre costs explains the gap. For context, the D-Max range ran from around $41,000 drive-away for the SX up to roughly $79,000 for the X-Terrain in 2025, so a quality set of tyres is a small fraction of the vehicle’s value and worth doing properly.
Weighing up other utes? See our sibling hubs for the Ford Ranger, the Toyota HiLux and the Mitsubishi Triton. Remember Australia’s legal minimum tread is 1.5mm in the principal grooves — see the 1.5mm rule — not the 1.6mm quoted on overseas sites.
Bottom line: An Australian D-Max runs 255/65R17 (SX, LS-M) or 265/60R18 (LS-U, X-Terrain) on a 6×139.7 pattern with a ~100.5mm bore, inflated to the placard figure (about 33 psi on 17s unladen). Every grade gets a full-size underslung spare. Match the load index, raise rears when loaded or towing, and pick an A/T or H/T to suit how you really drive.
D-Max tyre FAQ
What size tyres does an Isuzu D-Max use?
255/65R17 on the SX and LS-M, and 265/60R18 on the LS-U, X-Rider, X-Terrain and Blade. Confirm your exact size on the placard.
What tyre pressure should a D-Max run?
Around 33 psi cold front and rear for the 17-inch fitment unladen, set to your placard. Raise the rears when loaded or towing per the handbook.
What is the D-Max bolt pattern?
6×139.7mm with a centre bore around 100.5mm and M12×1.5 studs — the same pattern as the HiLux, Ranger and BT-50, but offset and bore must still match.
Does the D-Max have a full-size spare?
Yes — every D-Max carries a full-size spare slung under the tray, steel on the SX and usually a matching alloy on higher grades.
Can the D-Max tow 3,500 kg on its standard tyres?
Yes, the factory tyres are rated for the job, but you must keep them at the correct laden pressure and never fit a replacement below the placard load index.
Are all-terrain tyres worth it on a D-Max?
For mixed road and dirt, a quality all-terrain is ideal. If you rarely leave the bitumen, a long-wearing highway tyre is quieter, cheaper and lasts longer.
Sizes, pressures, weights and prices are 2026 guides only. Always confirm against your vehicle’s tyre placard, owner’s handbook and a current retailer quote. Sources: CarExpert — Isuzu D-Max SX specs; CarsGuide — D-Max tyre pressures.
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