Select your tyre size
Buy brand new 18" Tyres from Jax Tyres & Auto such as 165/40R18 & 225/40R18 tyres from leading brands such as Provato, Achilles & Hankook. JAX Tyres and Auto offer a full range of tyre sizes including tyre sizes suitable for cars, 4x4 and SUV tyres, vans, small cars and trailer tyres. Select from our range of tyres for popular wheel sizes , or simply search your rego to easily get the right sized tyres for your vehicle today.
Section Width: The tyre’s section width is measured on an ideal width of wheel, for which it has been designed to operate. The measurement distance in millimeters is from the maximum width of the tyre’s mid point of its sidewall to the same point on the opposite sidewall.
Aspect Ratio: This is the height of the tyre’s sidewall expressed as a percentage of the tyre’s section width. In the example, the height of the tyre’s sidewall is 40% of the tyre’s section width or 245 x 40% = 98mm.
Rim Diameter: The tyre’s rim diameter is measured in inches taken from the wheel flange where the tyre is seated (bead seat area) to the same point on the opposite side.
Tyre Sizes by Rim Diameter