225 is the tyre width in millimetres, 35 is the sidewall height as a percentage of the width, and R18 means it fits an 18-inch rim. Confirm the size by checking the markings on your current tyre sidewall and cross-checking your vehicle handbook or the door-jamb tyre label before ordering.
Choose the exact load index and speed rating listed on your vehicle’s tyre label or handbook, and do not go below the recommended ratings. Many 225/35 R18 options are available in higher speed ratings (such as W or Y) and in standard or XL (reinforced) constructions, so select what your car specifies to maintain safe handling and legal compliance.
Only switch if the alternative size is manufacturer-approved for your exact model and wheel width, as different profiles and widths can change rolling radius, clearance and ride quality. If you are unsure, check your handbook for approved tyre sizes and confirm the correct fitment before buying.
They can be, because the 35 profile leaves less sidewall to absorb potholes and kerb impacts. To reduce the risk, keep pressures at the recommended level, consider tyres with rim protection and, where specified for your car, an XL reinforced version, and inspect sidewalls regularly for cuts or bulges.
Summer tyres suit typical UK spring to autumn conditions and prioritise dry and wet grip at milder temperatures. If you regularly drive in colder conditions, look for winter or all-season options with the 3PMSF marking for improved traction below 7C, then compare available tread patterns and ratings to match your mileage and driving style.
