Hi sifu-sifus, I'm currently using 17" Michelin Primacy 4 on my Golf and thinking of upgrading it to 18" together with new rim.

Options I'm considering:
1) 17" Primacy 4 --> 18" Primacy 4 (Question - will this option still give the same comfort level as the current one or otherwise?)
2) 17" Primacy 4 --> 18" PS4 (Question - will this be a drastic change where I'll start hearing a lot of tyre noises and things like that?)

As I haven't tried any PS4 nor 18" tyre before, so can't really visualise how it's gonna feel after the upgrade.

Therefore reaching out to get your thoughts and advice, very much appreciated sifu-sifus!

1. Nope, it will still be noticeably harsher/less comfortable ride quality due to much thinner profile tires.
2. Even harsher and noisier than no.1 above.
I highly recommend for Golf just to stay 17, especially if you're asking such questions above about comfort which means you do care about that aspect. I suggest you change to PS4 but stay 17 cuz the sacrifice in comfort and noise is minimal yet you gain a lot in tire performance and grip.

Comfort level when I went from 16" (215 60 16) to Primacy 3 17" (215 55 17) on 2004 camry was really noticeable. 18" would be even harsher I guess. 16 is like hovercraft feeling. 17 corners much better, but I won't go to 18 else it gonna feel like a pickup truck.

This post has been edited by ceo684: Jan 16 2021, 11:25 PM

Thanks thanks! Yes - I do appreciate the comfort so probably option 1 suits be better as you said. Though tt's really tempting to upgrade to 18" for better look and feel (hahaha!!)

Btw profile wise it's currently 225/45/17. Will probably try out PS4 once the current tyre wears out!

To get an idea of how 18" gonna feel you can try pumping 280-290 kpa in your 17" and take it for a spin for a simulation.

This is still adjustable by going to nearest air pump to revert back previous settings - whilst if you bought 18" you're kinda stuck with it for a bit.

Yes, I know Golf std 17 is 225/45/17 which still has 10.1cm sidewall height. For me personally, don't go down below 10cm if want to still retain decent comfort. If you go 18 in the Golf you need to use 225/40/18 which only has 9cm sidewall, so a significant drop in rubber cushion and thus comfort.

Thanks both, I think I've gotten the answer... Probably a small jump from 17" Primacy 4 to PS4 first when the current one wears out. If PS4 suits and the difference is acceptable then only consider 18" upgrade in the future!