TYRE SIZE CALCULATOR



SPECIAL PRICES ON 17" & 18" RIAL ANCONA FULL CHROME ALLOY WHEELS
to fit all popular cars - please click here to enquire
Rial Ancona Alloy 7½ x 17" 4x100 ET38
7½ x 17" 5x120 ET35
 Set of 4
ONLY
£230
delivered

Extra for 205.40.17
tyres fitted £130
8 x 18" 4x100 ET38
8 x 18" 5x114 ET35
8 x 18" 5x114 ET45
Set of 4
ONLY
£250
delivered

Extra for 225.40.18
tyres fitted £190

Scroll down then select dimensions of tyres to determine the overall diameter
Matching overall diameters if changing wheel & tyre sizes is necessary to ensure ride height & gearing don't change
Old »
Tyre »
Size »		 Tread
Width		 Profile
Height		 Wheel
Diameter		 Overall
Tyre Diameter
  mm   %   inches   inches   mm
It is quite easy to select impossible tyre sizes or sizes that are not made!
New »
Tyre »
Size »		   mm   %   inches   inches   mm
We recommend ±2.5% is the MAXIMUM difference in diameters
Difference in Diameter: percentage =  %    actual =  mm
Use the TAB key to move between the fields then the ARROW keys to select the values
(SHIFT+TAB reverses direction of selection) or the MOUSE selects from the Drop Down Boxes
Other Technical links:
Tyre Speed Ratings || Tyre Load Ratings || Vehicle Wheel Fitment

to Technical Information Index Page || to Top of Page || to First Page || Site Index & Enquiries