Buy 275/40 R17 Tyres

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275/40 R17 Numbers Explained

The Dodge Viper RT/10s and GTS models have 275/40 R17s as front tyres and rear tyres that are wider. It's pretty clear what 275 means: it's the width of the tyre in mm. 40 is the sidewall height as a percentage of the section width/ tyre width, and it would be 40% of 275mm, equalling 110mm. R17 stands for the radial tyre that is on a 17-inch rim, and that makes the diameter 652mm. That 110mm sidewall was the fitment for the front of the Viper. You can find 275/40 R17 on Tyres.co.uk.

Part of the sizeValueWhat it means
Section width 275 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 40 Sidewall height as a percentage of the width - here, 40% of 275 mm (about 110 mm).
Construction R Radial construction, which is what nearly all road tyres use.
Rim diameter 17 The wheel diameter the tyre fits, measured in inches.
Your tyre dimensions
MeasurementValue
Sidewall height 110.0 mm (4.33 in)
Overall diameter 652 mm (25.7 in)
Circumference 2,048 mm (80.6 in)
Revolutions 786 per mile · 488 per km
Equivalent sizes
SizeOverall diameter
275/35 R18 650 mm · -0.3%
285/35 R18 657 mm · +0.8%
265/35 R18 643 mm · -1.4%
255/40 R18 661 mm · +1.4%
255/45 R17 661 mm · +1.5%
295/35 R18 664 mm · +1.8%