TIRE DIAMETER CHART
17 Inch Wheels
225/30/17 = 22.315 225/35/17 = 23.201 225/40/17 = 24.087 225/45/17 = 24.972 225/50/17 = 25.858 225/55/17 = 26.744 235/30/17 = 22.551 235/35/17 = 23.476 235/40/17 = 24.402 235/45/17 = 25.327 235/50/17 = 26.252 235/55/17 = 27.177 245/30/17 = 22.787 245/35/17 = 23.752 245/40/17 = 24.717 245/45/17 = 25.681 245/50/17 = 26.646 245/55/17 = 27.610 255/30/17 = 23.024 255/35/17 = 24.028 255/40/17 = 25.031 255/45/17 = 26.035 255/50/17 = 27.039 255/55/17 = 28.043 265/30/17 = 23.260 265/35/17 = 24.303 265/40/17 = 25.346 265/45/17 = 26.390 265/50/17 = 27.433 265/55/17 = 28.476 275/30/17 = 23.496 275/35/17 = 24.579 275/40/17 = 25.661 275/45/17 = 26.744 275/50/17 = 27.827 275/55/17 = 28.909 285/30/17 = 23.732 285/35/17 = 24.854 285/40/17 = 25.976 285/45/17 = 27.098 285/50/17 = 28.220 285/55/17 = 29.343 295/30/17 = 23.969 295/35/17 = 25.130 295/40/17 = 26.291 295/45/17 = 27.453 295/50/17 = 28.614 295/55/17 = 29.776 18 Inch Wheels 225/30/18 = 23.315 225/35/18 = 24.201 225/40/18 = 25.087 225/45/18 = 25.972 225/50/18 = 26.858 225/55/18 = 27.744 235/30/18 = 23.551 235/35/18 = 24.476 235/40/18 = 25.402 235/45/18 = 26.327 235/50/18 = 27.252 235/55/18 = 28.177 245/30/18 = 23.787 245/35/18 = 24.752 245/40/18 = 25.717 245/45/18 = 26.681 245/50/18 = 27.646 245/55/18 = 28.610 255/30/18 = 24.024 255/35/18 = 25.028 255/40/18 = 26.031 255/45/18 = 27.035 255/50/18 = 28.039 255/55/18 = 29.043 265/30/18 = 24.260 265/35/18 = 25.303 265/40/18 = 26.346 265/45/18 = 27.390 265/50/18 = 28.433 265/55/18 = 29.476 275/30/18 = 24.496 275/35/18 = 25.579 275/40/18 = 26.661 275/45/18 = 27.744 275/50/18 = 28.827 275/55/18 = 29.909 285/30/18 = 24.732 285/35/18 = 25.854 285/40/18 = 26.976 285/45/18 = 28.098 285/50/18 = 29.220 285/55/18 = 30.343 295/30/18 = 24.969 295/35/18 = 26.130 295/40/18 = 27.291 295/45/18 = 28.453 295/50/18 = 29.614 295/55/18 = 30.776 19 Inch Wheels 225/30/19 = 24.315 225/35/19 = 25.201 225/40/19 = 26.087 225/45/19 = 26.972 225/50/19 = 27.858 225/55/19 = 28.744 235/30/19 = 24.551 235/35/19 = 25.476 235/40/19 = 26.402 235/45/19 = 27.327 235/50/19 = 28.252 235/55/19 = 29.177 245/30/19 = 24.787 245/35/19 = 25.752 245/40/19 = 26.717 245/45/19 = 27.681 245/50/19 = 28.646 245/55/19 = 29.610 255/30/19 = 25.024 255/35/19 = 26.028 255/40/19 = 27.031 255/45/19 = 28.035 255/50/19 = 29.039 255/55/19 = 30.043 265/30/19 = 25.260 265/35/19 = 26.303 265/40/19 = 27.346 265/45/19 = 28.390 265/50/19 = 29.433 265/55/19 = 30.476 275/30/19 = 25.496 275/35/19 = 26.579 275/40/19 = 27.661 275/45/19 = 28.744 275/50/19 = 29.827 275/55/19 = 30.909 285/30/19 = 25.732 285/35/19 = 26.854 285/40/19 = 27.976 285/45/19 = 29.098 285/50/19 = 30.220 285/55/19 = 31.343 295/30/19 = 25.969 295/35/19 = 27.130 295/40/19 = 28.291 295/45/19 = 29.453 295/50/19 = 30.614 295/55/19 = 31.776 |
Good reference -- I'd been using a calculator online..
Interesting that the s-line has slightly more tire diameter then any of the 18s. (.35-.4 inch) That would definitely make a difference in lessening the appearance of wheel gap.
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I wonder if Audi tweaks the Sline speedo to compensate
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Dear Sir,
A little advice. I ma presently having my Q7 tyre size 255/55/18 can i use 285/50/18 (biiger size0 and whether use of this size can have effect on height or milage. please advice to my email id : tsenchok@druknet.bt. Appreciate it. Rgds Tshenchok
Originally Posted by tt-chris
(Post 23418280)
17 Inch Wheels
225/30/17 = 22.315 225/35/17 = 23.201 225/40/17 = 24.087 225/45/17 = 24.972 225/50/17 = 25.858 225/55/17 = 26.744 235/30/17 = 22.551 235/35/17 = 23.476 235/40/17 = 24.402 235/45/17 = 25.327 235/50/17 = 26.252 235/55/17 = 27.177 245/30/17 = 22.787 245/35/17 = 23.752 245/40/17 = 24.717 245/45/17 = 25.681 245/50/17 = 26.646 245/55/17 = 27.610 255/30/17 = 23.024 255/35/17 = 24.028 255/40/17 = 25.031 255/45/17 = 26.035 255/50/17 = 27.039 255/55/17 = 28.043 265/30/17 = 23.260 265/35/17 = 24.303 265/40/17 = 25.346 265/45/17 = 26.390 265/50/17 = 27.433 265/55/17 = 28.476 275/30/17 = 23.496 275/35/17 = 24.579 275/40/17 = 25.661 275/45/17 = 26.744 275/50/17 = 27.827 275/55/17 = 28.909 285/30/17 = 23.732 285/35/17 = 24.854 285/40/17 = 25.976 285/45/17 = 27.098 285/50/17 = 28.220 285/55/17 = 29.343 295/30/17 = 23.969 295/35/17 = 25.130 295/40/17 = 26.291 295/45/17 = 27.453 295/50/17 = 28.614 295/55/17 = 29.776 18 Inch Wheels 225/30/18 = 23.315 225/35/18 = 24.201 225/40/18 = 25.087 225/45/18 = 25.972 225/50/18 = 26.858 225/55/18 = 27.744 235/30/18 = 23.551 235/35/18 = 24.476 235/40/18 = 25.402 235/45/18 = 26.327 235/50/18 = 27.252 235/55/18 = 28.177 245/30/18 = 23.787 245/35/18 = 24.752 245/40/18 = 25.717 245/45/18 = 26.681 245/50/18 = 27.646 245/55/18 = 28.610 255/30/18 = 24.024 255/35/18 = 25.028 255/40/18 = 26.031 255/45/18 = 27.035 255/50/18 = 28.039 255/55/18 = 29.043 265/30/18 = 24.260 265/35/18 = 25.303 265/40/18 = 26.346 265/45/18 = 27.390 265/50/18 = 28.433 265/55/18 = 29.476 275/30/18 = 24.496 275/35/18 = 25.579 275/40/18 = 26.661 275/45/18 = 27.744 275/50/18 = 28.827 275/55/18 = 29.909 285/30/18 = 24.732 285/35/18 = 25.854 285/40/18 = 26.976 285/45/18 = 28.098 285/50/18 = 29.220 285/55/18 = 30.343 295/30/18 = 24.969 295/35/18 = 26.130 295/40/18 = 27.291 295/45/18 = 28.453 295/50/18 = 29.614 295/55/18 = 30.776 19 Inch Wheels 225/30/19 = 24.315 225/35/19 = 25.201 225/40/19 = 26.087 225/45/19 = 26.972 225/50/19 = 27.858 225/55/19 = 28.744 235/30/19 = 24.551 235/35/19 = 25.476 235/40/19 = 26.402 235/45/19 = 27.327 235/50/19 = 28.252 235/55/19 = 29.177 245/30/19 = 24.787 245/35/19 = 25.752 245/40/19 = 26.717 245/45/19 = 27.681 245/50/19 = 28.646 245/55/19 = 29.610 255/30/19 = 25.024 255/35/19 = 26.028 255/40/19 = 27.031 255/45/19 = 28.035 255/50/19 = 29.039 255/55/19 = 30.043 265/30/19 = 25.260 265/35/19 = 26.303 265/40/19 = 27.346 265/45/19 = 28.390 265/50/19 = 29.433 265/55/19 = 30.476 275/30/19 = 25.496 275/35/19 = 26.579 275/40/19 = 27.661 275/45/19 = 28.744 275/50/19 = 29.827 275/55/19 = 30.909 285/30/19 = 25.732 285/35/19 = 26.854 285/40/19 = 27.976 285/45/19 = 29.098 285/50/19 = 30.220 285/55/19 = 31.343 295/30/19 = 25.969 295/35/19 = 27.130 295/40/19 = 28.291 295/45/19 = 29.453 295/50/19 = 30.614 295/55/19 = 31.776 |
Dear Sir,
A little advice. I have a Audi Q7 model 2009 and it has presently tyre size 255/55/18 (standard) . I would like to put bigger tyres on the 18 inch alloy wheel rim . Can i use 285/50/18 Tyre size (bigger size) and whether use of this size can have effect on height or milage. please advice to my email id : tsenchok@druknet.bt. Appreciate it. Rgds Tshenchok
Originally Posted by tt-chris
(Post 23418280)
17 Inch Wheels
225/30/17 = 22.315 225/35/17 = 23.201 225/40/17 = 24.087 225/45/17 = 24.972 225/50/17 = 25.858 225/55/17 = 26.744 235/30/17 = 22.551 235/35/17 = 23.476 235/40/17 = 24.402 235/45/17 = 25.327 235/50/17 = 26.252 235/55/17 = 27.177 245/30/17 = 22.787 245/35/17 = 23.752 245/40/17 = 24.717 245/45/17 = 25.681 245/50/17 = 26.646 245/55/17 = 27.610 255/30/17 = 23.024 255/35/17 = 24.028 255/40/17 = 25.031 255/45/17 = 26.035 255/50/17 = 27.039 255/55/17 = 28.043 265/30/17 = 23.260 265/35/17 = 24.303 265/40/17 = 25.346 265/45/17 = 26.390 265/50/17 = 27.433 265/55/17 = 28.476 275/30/17 = 23.496 275/35/17 = 24.579 275/40/17 = 25.661 275/45/17 = 26.744 275/50/17 = 27.827 275/55/17 = 28.909 285/30/17 = 23.732 285/35/17 = 24.854 285/40/17 = 25.976 285/45/17 = 27.098 285/50/17 = 28.220 285/55/17 = 29.343 295/30/17 = 23.969 295/35/17 = 25.130 295/40/17 = 26.291 295/45/17 = 27.453 295/50/17 = 28.614 295/55/17 = 29.776 18 Inch Wheels 225/30/18 = 23.315 225/35/18 = 24.201 225/40/18 = 25.087 225/45/18 = 25.972 225/50/18 = 26.858 225/55/18 = 27.744 235/30/18 = 23.551 235/35/18 = 24.476 235/40/18 = 25.402 235/45/18 = 26.327 235/50/18 = 27.252 235/55/18 = 28.177 245/30/18 = 23.787 245/35/18 = 24.752 245/40/18 = 25.717 245/45/18 = 26.681 245/50/18 = 27.646 245/55/18 = 28.610 255/30/18 = 24.024 255/35/18 = 25.028 255/40/18 = 26.031 255/45/18 = 27.035 255/50/18 = 28.039 255/55/18 = 29.043 265/30/18 = 24.260 265/35/18 = 25.303 265/40/18 = 26.346 265/45/18 = 27.390 265/50/18 = 28.433 265/55/18 = 29.476 275/30/18 = 24.496 275/35/18 = 25.579 275/40/18 = 26.661 275/45/18 = 27.744 275/50/18 = 28.827 275/55/18 = 29.909 285/30/18 = 24.732 285/35/18 = 25.854 285/40/18 = 26.976 285/45/18 = 28.098 285/50/18 = 29.220 285/55/18 = 30.343 295/30/18 = 24.969 295/35/18 = 26.130 295/40/18 = 27.291 295/45/18 = 28.453 295/50/18 = 29.614 295/55/18 = 30.776 19 Inch Wheels 225/30/19 = 24.315 225/35/19 = 25.201 225/40/19 = 26.087 225/45/19 = 26.972 225/50/19 = 27.858 225/55/19 = 28.744 235/30/19 = 24.551 235/35/19 = 25.476 235/40/19 = 26.402 235/45/19 = 27.327 235/50/19 = 28.252 235/55/19 = 29.177 245/30/19 = 24.787 245/35/19 = 25.752 245/40/19 = 26.717 245/45/19 = 27.681 245/50/19 = 28.646 245/55/19 = 29.610 255/30/19 = 25.024 255/35/19 = 26.028 255/40/19 = 27.031 255/45/19 = 28.035 255/50/19 = 29.039 255/55/19 = 30.043 265/30/19 = 25.260 265/35/19 = 26.303 265/40/19 = 27.346 265/45/19 = 28.390 265/50/19 = 29.433 265/55/19 = 30.476 275/30/19 = 25.496 275/35/19 = 26.579 275/40/19 = 27.661 275/45/19 = 28.744 275/50/19 = 29.827 275/55/19 = 30.909 285/30/19 = 25.732 285/35/19 = 26.854 285/40/19 = 27.976 285/45/19 = 29.098 285/50/19 = 30.220 285/55/19 = 31.343 295/30/19 = 25.969 295/35/19 = 27.130 295/40/19 = 28.291 295/45/19 = 29.453 295/50/19 = 30.614 295/55/19 = 31.776 |
For nearly 4 decades , I have used this simple formula :
example for : 235/40 -18 size tire [ ( 235 x .079) x .4 ] + 18 = 25.43 inches outside tire diameter .079 is a constant .4 is used here because it's a " 40 " aspect ratio tire , meaning sidewall height is 40 % of the tire width in mm ( 235 in this case ) 18 is the wheel diameter in inches so , 345/55 - 20 tire's outside diameter would be : [ ( 345 x .079) x .55 ] + 20 = 34.99 inches |
Informative and interesting which we share with you so i think so it is very useful and knowledgeable. I would like to thank you for the efforts. I am tiring the same best work from me in the future as well.
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