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I am going to need new shoes for my R34 GTT,

It comes with Stock R32 GTR RIMS,

Does the 245 in 245/50R16 mean the width of a tyre in mm?

Can I use a tire as large as 245 width? or will it look bad / wont fit? I want a solid parallel fit no angle due to too large/ too small tire.

Whats a common tire size people buy? 225? 235?

Thanks

To answer your question - yes to width of tyre size for 245

Stock r32 gtr - 16x8 +30 wheel, Tyre 225/50R16

I'm not sure why you want them on your 34GTT. 18's look so much better.

Can you use 245's on the 32 GTR rims - yes.

I've not tried the combination of R32 GTR rims on a 34GTT so not sure on flush fit but I can say they will look small and gappy around the circumference.

245s will look horrible on an 8" rim. Quite baggy. 225 is correct and works well at 50 profile. 235 is a little too tall at 50 profile (longer gearing) and a fair bit too short (shorter gearing) at 45 profile. 245 will be a lot too tall at 50 profile. not as bad in 45, but still not quite right - as well as being baggy anyway.

Tyre manufacturers rate this size for use between 7 - 8.5 in wide tyres, perfectly in spec... although stretch/stance-fairies may dislike it.

Variance in speed is only +3%, about the same as most people get jumping to common 18" wheel sizes

245/50/R16s on my GTR a few years ago.

IMG_0188.jpg

^ That picture reminds me of all the HQ Kingers I grew up with with 265 tyres on Dragways bulging out all over the place. Cool in the 80s. Things have changed. The only reason you get away with it in that photo is because we're talking tyres with tall enough sidewalls to take the abuse. You wouldn't get it to work with a 35 profile tyre.

I think there's a big difference between "stretch/stance fairies" and those of us who see baggy sidewalls like that as being incorrect fitment. The 245 tyre will probably provide worse handling and grip than the correct 225 size just from the sidewalls being mechanically bent out of shape, regardless of the extra rubber on the road.

Don't get me wrong, I've done it too. I ran 225/50 on 6.5" GTSt rims, which is about the same level of wrongness. It was OK, but it wasn't great.

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