Can I change the size of my car tyres?

Car manufacturers recommend tyre sizes, which you'll find in the notebook or doorsill. These dimensions are approved and ensure maximum performance for your vehicle. You can use any of options given by the manufacturer without any worries.

If you use something that hasn't been approved, you may no longer be in compliance with the legislation, be issued with a follow-up inspection during your MOT, or have problems with your insurance in case of an accident.

However, you may still want to change the size of your tyres to a size not approved by the manufacturer. If you choose to do so, you must choose the right width and the right theoretical equivalence according to the data in the table available HERE.

Rim width	Minimum tyre width	Ideal tyre width	Maximum tyre width
5.0 Inches	155 mm	165 or 175 mm	185 mm
5.5 Inches	165 mm	175 or 185 mm	195 mm
6.0 Inches	175 mm	185 or 195 mm	205 mm
6.5 Inches	185 mm	195 or 205 mm	215 mm
7.0 Inches	195 mm	205 or 215 mm	225 mm
7.5 Inches	205 mm	215 or 225 mm	235 mm
8.0 Inches	215 mm	225 or 235 mm	245 mm
8.5 Inches	225 mm	235 or 245 mm	255 mm
9.0 Inches	235 mm	245 or 255 mm	265 mm
9.5 Inches	245 mm	255 or 265 mm	275 mm
10.0 Inches	255 mm	265 or 275 mm	285 mm
10.5 Inches	265 mm	275 or 285 mm	295 mm
11.0 Inches	275 mm	285 or 295 mm	305 mm
11.5 Inches	285 mm	295 or 305 mm	315 mm
12.0 Inches	295 mm	305 or 315 mm	325 mm
12.5 Inches	305 mm	315 or 325 mm	335 mm