If you love getting out there on the open road, then getting educated on the key aspects of off-roading is essential as well as an educational journey.
Since a car is nothing without its tyres, let’s take a look into this segment. First of all, tyre size can be calculated in metric (millimetres) or imperial (inches). While measuring a tyre, the width of the tread, rim size and size of the side wall are taken into consideration.
To be specific, if a tyre’s width is said to be 285 it means this figure is in millimetres. If you see the figure R16, take it to mean the rim’s size which is mentioned in inches. Finally, 75 is the side wall’s height which has to be used as a percentage of the tyre’s width.
“if you want to calculate the full diameter of the tyre based on these figures, proceed this way: 75% of 285 (215 x 0.75) = 213.75mm. This is the actual height of the side wall”
Now if you want to calculate the full diameter of the tyre based on these figures, proceed this way: 75% of 285 (215 x 0.75) = 213.75mm. This is the actual height of the side wall. Now you need to add rim size to it to get the full diameter. But rim size 16 is mentioned in inches. So convert it to millimetres first which brings it to 406.4mm. Finally, add 213.75mm with 406.4mm and 213.75mm for full diameter calculation which comes to 833.9mm as a result. And if you convert 833.9mm in inches, it will be 32.83 inches.
But wait, there’s more!
However, this doesn’t end here. There are numerous terms used in the context of tyres and you should have a basic idea about at least some of them. For your convenience, we discuss a few right here….
The sides of the tyre are referred to as sidewalls, while the term track or treads is associated with the rubber covering the edges of the tyres. It is this part of the tyre which remains in touch with the roads or grounds. Ok, that was kindergarten level lol, but hey, you have to start somewhere and we’re in the business of giving noobs all the resources they need!
Apart from these, you may also have heard the term footprint when discussing about traction. Footprint refers to that part of the tyre which maintains contact with the roads every time. Another commonly used term with reference to tyres is bead. Bead is that portion of the tyre which helps it to stay connected to the rim.
See, that wasn’t so hard, was it? We’ll be back with some more advanced tips. In the meantime, here’s a piece we did on Mud Tyres.