A bulge, exposed cord, serious cut or rapid pressure loss is not something a web checker can clear as safe. Avoid unnecessary driving and arrange professional inspection.
What to check
The sidewall flexes continually and structural damage can be hidden.
Do not attempt a DIY sidewall repair.
Fine surface ageing and deep structural cracking are not the same thing; uncertainty warrants inspection.
Why sidewalls need caution
The sidewall flexes under load and structural damage can be more serious than it appears externally. Bulges, exposed cords, deep cuts or rapid pressure loss justify avoiding unnecessary driving and obtaining physical inspection.
What not to do
Do not sand, glue, plug or cosmetically hide sidewall damage. Tyre dressing can make rubber look darker but cannot restore structural integrity.
TyreDeck can help you spot warning signs, but it cannot inspect the tyre internally, measure damage, verify pressure calibration or certify that a tyre is safe to drive on. If you are unsure, avoid unnecessary driving and arrange a competent physical inspection.
What to do next
If the vehicle should not be driven, look for a mobile fitting or recovery option rather than travelling on a suspect tyre.
Sources and review
- Jurisdiction
- United Kingdom
- Last verified
- 2026-08-29
- Primary sources
- The Highway Code / GOV.UK
DVSA MOT inspection manual