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I ran a set of CM Reifnitz for three years including some tough winter use.
Check with CM as mine came in ET45 not the advertised 42mm so were a more friendly offset.
ET42 is pretty tight at the front for clearance on strong compression bumps. I’ve run ET41 as well and my front arches survived so it’s not a big worry.

Going to a 40 profile on a 19” wheel is not a good idea in my opinion. As above, the Speedo will be out, your insurance will need notification and the tyre will be even closer to the arch on compression (bearing in mind the lower offset)

If they’re mostly intended as winter wheels then some Michelin cross climates might be a wiser tyre choice(?)  their sidewalls will probably be slightly more pliant than summer UHP tyres.

For reference I ran various factory 18” Bridgestone tyres on several mk7’s and had factory Pirellis on my TCR.
The Pirellis were pretty nasty and the Bridgestones not my favourite tyres.

Think i'm at the point of ditching the 235/40 idea, too much hassle with potential fit and insurance, may go down to 18's which may well help a bit at some point but means buying another set of wheels!!! So for now just new tyres i think, have had PS4's on all my Golfs, agree re the Bridgestone's, they weren't great on my Polo and only drove briefly on my GTI PP(18" Austin's) before getting a set of Brescia's with PS4's.

Seems there are potentially quieter tyres now though wondering a couple of DB difference helps with noise, would it mean a more pliable tyre too and potentially help with ride over crap surfaces do you think?

I ran a set of CM Reifnitz for three years including some tough winter use.
Check with CM as mine came in ET45 not the advertised 42mm so were a more friendly offset.
ET42 is pretty tight at the front for clearance on strong compression bumps. I’ve run ET41 as well and my front arches survived so it’s not a big worry.

Going to a 40 profile on a 19” wheel is not a good idea in my opinion. As above, the Speedo will be out, your insurance will need notification and the tyre will be even closer to the arch on compression (bearing in mind the lower offset)

If they’re mostly intended as winter wheels then some Michelin cross climates might be a wiser tyre choice(?)  their sidewalls will probably be slightly more pliant than summer UHP tyres.

For reference I ran various factory 18” Bridgestone tyres on several mk7’s and had factory Pirellis on my TCR.
The Pirellis were pretty nasty and the Bridgestones not my favourite tyres.

Hi C

Really useful feedback, thanks.

Many have been disappointed with the HK system, particularly those coming form a MK7/MK7.5.

I don't know if you have seen it, but I make these for members looking to improve the set-up with a simple plug and play option.

100% positive feedback, including many with HK, as it uses the standard system speaker!

Any queries, just shout.

I had similar on my ED30, the switch was all gunked up with the cleaning products it's previous owner(s) had used.
perhaps the switch is dirty, it's not in the best location.
Good luck!

@pixelcellar - Below are the results from the calculator on www.willtheyfit.com of fitting the wheel/tyre combination you’re proposing to fit compared to your existing wheel / tyre setup;



You’ll see that fitting tyres with a higher sidewall height increases the radius and circumference of your car’s wheel / tyre combination which will result in a speedometer error; with your proposed setup the speedo will under-read by 3.6% so the indicated speed displayed will be less than the true speed being travelled. I’m assuming you’re in the UK - be aware that from a legal perspective in the UK, while it is permissible for a car’s speedo to over-read by up to a pre-defined margin, it must not under-read by any amount (presumably to stop drivers unknowingly exceeding the speed limit) - see article at the link below;

https://www.thecarexpert.co.uk/how-accurate-is-a-car-speedometer/

I did know about the speedo under/over reading, this tool is useful though for the offset workings, thanks for sharing as i'd not seen that before.

May have to scrap the 40's idea then, maybe just need a quieter tyre than a PS4 if i can't have more rubber, any ideas?