225/45 R19 Tyres Explained

225/45 R19 is a common tyre size for cars that need a balance of sharp handling and a lower-profile look. The numbers show the tyre dimensions. 225 is the tread width in millimetres. 45 is the aspect ratio, so the sidewall height is 45% of 225mm (about 101mm). R19 means the tyre fits a 19 inch rim. You'll find this size offered by premium manufacturers such as Michelin, Continental, Pirelli, Bridgestone and Goodyear. mid range brands on the page include Hankook, Kumho, Yokohama and Falken. Value options include Wanli, Tomket, Mazzini and Royal Black. You can choose performance models like the Michelin Pilot Sport 4 or all season tyres such as the Continental AllSeason Contact 2 in 225/45 R19. Confirm this is the correct size for your car by checking the tyre sidewall, the driver's door sticker or your vehicle handbook, or enter your registration for exact matches.

The first 3 sets of numbers that you will see when reading a tyre size tell you the width, profile and diameter of your tyre. In this case, for the tyre size 225/45 R19 this is broken down as follows: 225 - the width of the tyre in millimetres. In this case 225mm wide. 45 - the height of the sidewall as a percentage of the width. In this case 45% R19 - the diameter of the tyre's inner rim in inches. Essentially what size of wheel this is intended to be fitted onto. For this size, that is a 19 inch wheel

There is no standard recommended tyre pressure for 225/45 R19 tyres, as each vehicle manufacturer will recommend their own optimal tyre pressure so you can enjoy the best performance from your vehicle. If you are unsure as to the correct tyre pressure for your 225/45 R19 tyres, there are a few different places you can look to find this information. Vehicle handbook - There is a section in most manufacturer handbooks which covers all the technical details for a tyre. This includes the tyre size, load rating, speed rating and tyre pressure. Tyre label - The tyre label is often found on the door jamb of the driver’s side. It is a small rectangular sticker which contains the information you need to know in regards to tyre pressure and tyre sizes. It should also tell you the tyre pressure recommendation

The height of your tyre's sidewall for the tyre size 225/45 R19 can be worked out by using the tyre's profile size. For the tyre size, the profile is 45. What this tells us is that the sidewall height is 45% of the cross-section width of the tyre. The sidewall height is determined by the distance between the rim line and the tread line. So, as this tyre has a cross-section width of 225mm, the height of the sidewall is 45% of 225 – which is 101.25mm.