Tyre fails on a NSW pink slip — the rules mechanics actually apply
Tyres are the single most common pink slip fail we see. The rules aren't complicated but they're stricter than most owners realise — 1.5 mm tread minimum across the full width, no cord showing, matched pairs on each axle.
- Reviewed by
- NSW Pink Slip Review Panel
- Published
- 20 January 2026
- Read time
- 3 min
If we had to pick one item that fails more pink slips than any other in NSW, it's tyres. Not because owners neglect them entirely — but because the rules the inspector applies are stricter than what feels visually "okay" from the driveway.
Here's exactly what an authorised inspector checks, what fails, and how to pre-check your own car so you don't waste an inspection slot.
The rules in one paragraph
A tyre passes if it has at least 1.5 mm of tread across the full width and the entire circumference, no exposed cord or belt, no sidewall bulge or cut deeper than 25 mm, is the correct load and speed rating for the vehicle, and matches the other tyre on the same axle in construction (radial with radial, same size, same speed rating). Anything else is a fail.
The five common ways tyres fail
In descending order of what we actually see on Sydney cars:
- Inside-edge wear from misalignment — legal in the middle, illegal on the inside edge
- Sidewall damage or bulges from kerbing or pothole hits
- Mismatched pair on one axle (someone replaced only one tyre)
- Incorrect load rating fitted (usually after a cheap replacement)
- Weather cracking on tyres older than 6–7 years, even if tread is fine
How to pre-check yours
Park on flat ground. Push a 20-cent coin into the tread — the bill of the platypus should disappear. Do that in three places across the tyre (inside, middle, outside) and on all four tyres. Walk around and look for bulges, cuts, or exposed cord. Check the DOT date code (last four digits of the DOT stamp — 3220 means week 32 of 2020) and if any tyre is older than 6 years replace it regardless of tread.
Frequently asked.
- Is 1.5 mm the same across the whole tyre?
- Yes. NSW requires 1.5 mm across the full tread width and the full circumference — not just the middle. Inside-edge wear from bad alignment is the most common cause of a fail even though the middle looks fine.
- Can I have different brands front and rear?
- Yes, provided each axle has matching pairs. Different brands across axles is fine; mismatched tyres on the same axle is a fail.
- Do run-flats have different rules?
- No — the tread and damage rules are identical. Run-flat sidewalls are stiffer, so damage can be harder to spot visually; check carefully.
- What if only one tyre is worn?
- You'll get a fail on that tyre. Replace it in a matched pair with the other tyre on the same axle if the other side is also close to the limit.
About the author
NSW Pink Slip — Lead Inspection Team
Lead AIS-Authorised eSafety Inspector · 18+ years
Our lead inspection team is Transport for NSW-authorised under the Authorised Inspection Scheme (AIS) to issue eSafety Checks (pink slips) for light vehicles up to 4.5t. Combined 18+ years of hands-on Sydney workshop experience — starting in general repair, moving through diagnostic specialisation on European and Japanese platforms, and settling into full-time mobile inspection since 2019. Every article on this site is authored or reviewed by a currently-authorised AIS examiner. If we can't verify a claim against a Transport for NSW or Service NSW source, it doesn't ship.
- ✓Transport for NSW authorised AIS examiner
- ✓Cert IV in Automotive Mechanical Diagnosis
- ✓Cert III in Light Vehicle Mechanical Technology
- ✓Cert III in Automotive Electrical Technology
- ✓Working with Children Check (WWC) verified
Reviewed by NSW Pink Slip Review Panel — Reviews every technical article for accuracy against current Transport for NSW rules, AIS inspector guidelines and manufacturer service data.
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