Use the values printed on your tyre or measured with a suitable gauge. TyreDeck explains the result but does not certify a tyre, wheel or vehicle as safe.
What this tells you
The size code identifies dimensions and service ratings. Always match the complete manufacturer-approved specification, not only the three large size numbers.
Use it properly
Copy the complete marking from the tyre sidewall, including load and speed ratings. Compare front and rear because some vehicles use staggered sizes. Check the handbook or approved fitment before ordering.
Safety note
If you see a bulge, exposed cord, serious cut, rapid pressure loss or a visibly flat tyre, avoid unnecessary driving and arrange a competent physical inspection.
Source and review
UK guidance · Reviewed 2026-08-29 · Official source