TYRE SIZE CALCULATOR
Select dimensions of tyres to determine the overall diameter Matching overall diameters when changing wheel & tyre sizes is necessary to ensure ride height and gearing /speedo readings don't change

Old » Tyre » Size »	Tread Width	Profile Height	Wheel Diameter	Overall Tyre Diameter
	355 345 335 325 315 305 295 285 275 265 255 245 235 225 215 205 195 185 175 165 155 145 135   mm	85 80 75 70 65 60 55 50 45 40 35 30   %	23 22 21 20 19 18 17 16 15 14 13 12 10   inches	inches	mm
	CHECK sizes you have selected are actually AVAILABLE!!!
New » Tyre » Size »	355 345 335 325 315 305 295 285 275 265 255 245 235 225 215 205 195 185 175 165 155 145 135   mm	85 80 75 70 65 60 55 50 45 40 35 30   %	23 22 21 20 19 18 17 16 15 14 13 12 10   inches	inches	mm
	Recommended ±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 use the MOUSE to select from the Drop Down Boxes
NOTE: It is possible to select Tyre sizes that are NOT actually available !!

CHECK sizes you have selected are actually AVAILABLE!!!

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