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R34 GTT 18 or 19s

Adz2332

By Adz2332,
in Exterior & Interior Styling

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GTSBoy Grand Master

GTSBoy

Posted
Posted

Have you thought about how low the tyre profile would need to be to run 19s without significantly increasing the rolling radius? For 235 wide, you'd need 35 profile tyres to match the 235/45-17 that is pretty much perfect on a 17. 35 profile tyres are not great for a regular street car (in terms of protecting the rims from potholes, etc, nor for comfort). If you try to go up to 265 width, you'd need to go down to 30 profile to get the same sidewall height.

Not shitcanning the idea of 19s, just pointing out the consequences.

You would use a 40 and a 35 for each of the above widths on an 18" rim.

GTSBoy Grand Master

GTSBoy

Posted
Posted

Where a 265/30-19 has almost exactly the same rolling radius (321mm) as a 235/45-17 (321.5mm), the 265/35-19 is somewhat taller, at 334mm. That's nearly 4% more, which will give a speedo error (reading slower) of that much.

What is the stock tyre size for an R34? Is it 225/45-17? If so, then all the radiuses I've listed above are actually a little taller even than the stock tyre, which is only 317mm. So the error for the 265/35 over the stock tyre is a bit more than 5%.

These aren't huge problems. Just worth keeping in mind.

  • 9 months later...

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