1 reply to this topic

[sinister]

There is a common misconception when reading tyre sizes that the profile of the tyre is measured in millimeters which is not correct, so here is a guide on how to read those numbers on your tyres correctly!

Tyre Measurements (Passenger Vehicle)

185/60R14 82

185 - Section width in millimeter
60 - Aspect Ratio
R - Radial Construction
14 - Rim Diameter in inches
82 - Load index


Tyre aspect ratio, what is it and why is it important?

Aspect ratio refers to the ratio between the tyres width and its side wall height. That is, a 205/60/15 size tyre has a 60% aspect ratio which means its side wall height is 60% of its width which is 205mm. Note that this is a ratio, not an absolute measurement so a 205/60 has a different side wall height measurement to a 195/60 even though the ratio is the same. The 15 refers to the wheel size in inches.

Key features of a reduced aspect ratio are;

* less side wall flex hence the car will turn-in better with more precision,
* greater carcass rigidity allowing higher effective slip angles.
* Ideal for bigger Selbys Swaybars
* increased effective spring rate at the wheel often requiring reduced physical spring rate
* increased NVH
* ride quality deteriorates
* greater probability of tyre and wheel damage

Source: Whiteline Automotive

[DECEIT]

And when you strech tyres onto wheels that all goes out the window