Bigger Wheels on 460
I got a nice set of 265/60 R18 wheels (from a G350 I think) and want to try them first on my 460.
Will I need spacers and longer wheel bolts to prevent rubbing/contact on the inner sides?
Obviously no electronics or ESP to worry about, and the slightly bigger circumference may add a little bit of top-speed for a more comfortable 3k rpm running.
I thought I would calculate that and to start there is a good explanation of Tyre Size standard here:
https://www.uniroyal-tyres.com/car/tyre-guide/tyre-knowledge/what-does-tyre-size-mean
So the circumference of my current 460 wheels (225/R75 R16) would be:
75% x 225 = 169mm. Plus half the rim diameter = R16 / 2 * 25.4 = 203mm. 168+203 = 372mm Radius (744mm diameter)
Interestingly, measured diameter with a tape and it was about 720mm, so close !
For the new tyre (265/60 R18):
60% x 265 = 159mm. Redius = R18 / 2 x 25.4 = 229mm. 159 + 229 = 388mm (775mm diameter)
Measured at 750mm, so the same undermeasurement.
Lets go with the calculated diameters:
1 wheel revolution = Pi x Diameter = 3.1416 x 744 = 2.34m (for the 460 wheel)
1 wheel revolution = 3.1416 x 775 = 2.43m (for the 463 wheels) - not that different
2.43/2.34 = +3.8% per revolution.
Now the guessing part... I recall that the 460 does about 3,800rpm at 60mph currently. So with the 3.8% increase in wheel, that will increase to 62.28mph.
So after all that... bugger all noticeable increase!
Anyway - they will look nice - anyone got wheel spacers and bolts?
the 463 wheels wont look right on the 460 without spacers
I'm getting Toyo Open Country A/T 265x60 R18 tyres tomorrow. The spec seems really good and apparently better wearing than the Yokohama's I currently have. Top rating for grip and quiet too, plus the sidewalls look good.
I opted out of getting the slightly bigger wheel (265 x 65) because the difference was marginal and the tyre expert said not to bother (OK I wimped out).