245/40 R19 Tyres Explained

245/40 R19 is a common tyre size for cars that need a low profile and 19 inch wheels. The numbers are simple. 245 is the tyre width in millimetres. 40 is the aspect ratio, so the sidewall height is 40% of 245mm (about 98mm). R19 means the tyre fits a 19 inch rim. Also check the load index and speed rating (eg. 98 Y) for your vehicle. You'll find this size on performance and sporty cars, many premium saloons, larger hatchbacks and some SUVs with 19 inch wheels. Premium manufacturers on the page include Michelin, Continental, Pirelli, Bridgestone and Goodyear. mid range options include Hankook, Kumho, Yokohama and Falken. Value choices include Wanli, Pace and Mazzini. You can choose high performance tyres such as the Michelin Pilot Sport 5 or the Continental SportContact 6 in 245/40 R19. Confirm fitment by checking the tyre sidewall, the driver's door sticker or your vehicle handbook, or enter your registration for exact matches.

The tyre size that you find on the sidewall of a tyre will tell you important information such as the width, profile and diameter of your tyre. In this case, for the tyre size 245/40 R19, this means the following: 245 - the width of the tyre in millimetres. I.e. 245mm wide. 40 - the height of the sidewall as a percentage of the width. In this case 40% R19 - the diameter of the tyre's inner rim in inches. Basically what size of wheel this is designed to fit onto. In this instance it is a 19 inch wheel.

There is no standard recommended tyre pressure for 245/40 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 245/40 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 245/40 R19 can be worked out by using the tyre's profile size. For the tyre size, the profile is 40. What this tells us is that the sidewall height is 40% 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 245mm, the height of the sidewall is 40% of 245 – which is 98mm.