GR86 Winter Tyres & Wheels

225 is just about okay on a 7 but I don't think it'll feel particularly sharp to drive on.

Here's another fitment calculator (need to pay, but isn't much) to see it against front and back of our car. Called wheel-it-fit. (just seen I forgot to change the profiles/ratios. But you get the idea)
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RumbleandSway said:
I went with 225 40 18 on the recommendation of TyrePoint - car feels epic
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I did too on the standard rims but, that's not really the issue here - the rims in the original question are narrower than oem, so we have a bit of 'double jeopardy' going on: wider tyres + an even narrower wheel. Happy to be proved wrong but I think it might end up with a bit of tyre wall squirm under load and it would lose driver feedback? Insurance changes would no doubt come into play too ...
 
Don't forget, a space saver is to get you home, not to run around long term on. As long as it bolts up and isn't out too much then it will be fine.
 
Sonic said:
I did too on the standard rims but, that's not really the issue here - the rims in the original question are narrower than oem, so we have a bit of 'double jeopardy' going on: wider tyres + an even narrower wheel. Happy to be proved wrong but I think it might end up with a bit of tyre wall squirm under load and it would lose driver feedback? Insurance changes would no doubt come into play too ...
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A shame (and thanks again for the feedback) but I’ll keep looking .. I was only really looking for winter tyres so I think that a decent set of steel golf rims would work .. But the Subaru rims are local and jumped out at me..
 
Beans said:
225 is just about okay on a 7 but I don't think it'll feel particularly sharp to drive on.

Here's another fitment calculator (need to pay, but isn't much) to see it against front and back of our car. Called wheel-it-fit. (just seen I forgot to change the profiles/ratios. But you get the idea)
2bcece34909ebb5df4899b64ae559589.jpg


Sent from my Pixel 8 Pro using Tapatalk
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Cheers @Beans
 
So I guess I’m pretty old school in my approach to cars, but the idea of having to change tyres for the winter seems like a right faff - surely PS4s aren’t so specialised that they’re only good in dry conditions??
But reading the posts about all-season tyres I’m wondering if I’m missing out. I daily drive my car and it’s still running PS4s with loads of life left in them, and so far all seems ok. I did have to drive up a short hill on a bend early one morning at about -3c when it had rained the previous night (and the gritter had forgotten to salt the road) and in fairness there was some pretty comical sideways action, but I suspect any tyres would’ve been the same in ice rink conditions?
So a few noob questions about all season tyres:
Do A/S tyres provide more grip than PS4s in all conditions except when it’s bone dry? (if so they sound like a better all round choice for a daily driver?)
Would A/S tyres be better than PS4s on a rainy summer’s day?
What are the conditions where A/S tyres provide worse grip than PS4s, and are they a lot worse (similar to primacy’s on a GT86??)
When you guys with CC2s are saying they’re great, do you mean you can actually press on through the bends on grimey B-roads, as if it was a dry road?? (If so then count me in…) or are you still being mindful that we’re in a RWD sports car and going a bit easy?
I’ve read a few comments on here about folk having fun on a wet roundabout on CC2s - I thought the point of these was to provide more grip in wet? Or is it just that they’re more progressive?
When there is actual ice on an unsalted road are all season tyres any better than PS4s or are we all in the same boat?
Has anyone tried running PS4s at lower PSI in winter - would this have a similar effect as running all season tyres?
Thanks!
 
I run 225 CC2s at 2.3bar. In any wet and especially below 7deg they are night and day. Transformative and I have to be really wanting to loose grip. Even on a hot (12 Deg!) day, CC2s have given better ride and noise levels than the PS4s did. An alignment check come spring when they are changed is due. Read some interesting tyre choices in the US and Europe, one things is for sure, I won't go PS4s again once that set wears out.
 
jb1750 said:
So I guess I’m pretty old school in my approach to cars, but the idea of having to change tyres for the winter seems like a right faff - surely PS4s aren’t so specialised that they’re only good in dry conditions??
But reading the posts about all-season tyres I’m wondering if I’m missing out. I daily drive my car and it’s still running PS4s with loads of life left in them, and so far all seems ok. I did have to drive up a short hill on a bend early one morning at about -3c when it had rained the previous night (and the gritter had forgotten to salt the road) and in fairness there was some pretty comical sideways action, but I suspect any tyres would’ve been the same in ice rink conditions?
So a few noob questions about all season tyres:
Do A/S tyres provide more grip than PS4s in all conditions except when it’s bone dry? (if so they sound like a better all round choice for a daily driver?)
Would A/S tyres be better than PS4s on a rainy summer’s day? Definitely
What are the conditions where A/S tyres provide worse grip than PS4s, and are they a lot worse (similar to primacy’s on a GT86??) Warm, dry days.
When you guys with CC2s are saying they’re great, do you mean you can actually press on through the bends on grimey B-roads, as if it was a dry road?? (If so then count me in…) or are you still being mindful that we’re in a RWD sports car and going a bit easy? Yes you can press on much more confidently than on summers. But in near-zero and sub-zero temperatures you still need to be careful.
I’ve read a few comments on here about folk having fun on a wet roundabout on CC2s - I thought the point of these was to provide more grip in wet? Or is it just that they’re more progressive? You need to be pretty deliberate on a roundabout to get it out of line if it’s just wet.
When there is actual ice on an unsalted road are all season tyres any better than PS4s or are we all in the same boat? Massively so.
Has anyone tried running PS4s at lower PSI in winter - would this have a similar effect as running all season tyres? No idea, but I’d doubt it.
Thanks!
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Answers above.
 
911sse said:
I run 225 CC2s at 2.3bar. In any wet and especially below 7deg they are night and day. Transformative and I have to be really wanting to loose grip. Even on a hot (12 Deg!) day, CC2s have given better ride and noise levels than the PS4s did. An alignment check come spring when they are changed is due. Read some interesting tyre choices in the US and Europe, one things is for sure, I won't go PS4s again once that set wears out.
Click to expand...
Im on 215 CC2's and agree with all you say that they have been fantastic in all conditions....until yesterday!! 15mph if that on a flip flop 2 lane mini round with very little throttle input and it went...mix of TC, straight off the gas and a heap of opposite lock that in reality was to late stopped it going right round....tip toed round the big roundabout onto slip road to dual A road and it was spinning up in 4th...I put this down to it must of been diesel on the road.

This morning heading off to Tescos after a long bend taken slowly gently accelerated to pass a Land Rover and it was breaking traction again far more than I would expect....Im putting it down to the roads out my way have been salted, which keeps them damp and theres a fair bit of mud as well making them super greasy.

Im going to drop the tyre pressures down to 2.1 from cold and see what that does as I notice that despite being inflated to 2.2 cold when they were fitted they are running at 2.4 on sub zero temps so that may well be part of the lack of grip!!
 
byebyeMX5 said:
Im on 215 CC2's and agree with all you say that they have been fantastic in all conditions....until yesterday!! 15mph if that on a flip flop 2 lane mini round with very little throttle input and it went...mix of TC, straight off the gas and a heap of opposite lock that in reality was to late stopped it going right round....tip toed round the big roundabout onto slip road to dual A road and it was spinning up in 4th...I put this down to it must of been diesel on the road.

This morning heading off to Tescos after a long bend taken slowly gently accelerated to pass a Land Rover and it was breaking traction again far more than I would expect....Im putting it down to the roads out my way have been salted, which keeps them damp and theres a fair bit of mud as well making them super greasy.

Im going to drop the tyre pressures down to 2.1 from cold and see what that does as I notice that despite being inflated to 2.2 cold when they were fitted they are running at 2.4 on sub zero temps so that may well be part of the lack of grip!!
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!! That’s nuts, but really interesting
 
If you run lower pressure in the tyres, that can prevent heat getting into the tread as the sidewall might flex more. Increasing the pressure might do the opposite, work the tread harder and get more heat into it.

Whether or not you want warmer tread and a smaller contact patch, or the other way round, well not sure. 🤷‍♂️

I'm running my all-season eco tyres at the recommended cold inflation pressure, so adding a little more air as the weather has become cooler, and the grip is ok.
 
Michelin Alpin 5’s continue to impress - great in the wet and particularly in this cold snap.

Winter tyres seem to generate mixed opinions from GR-ZOO members but I remain a strong advocate.
 
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