45 series is more comfortable, 40 series has better handling and less flex due to stiffer sidewall, so your ride will be harsher with 40, 45 has better noise control and ride smoother

grip wise, if it is the same tyres there wont be any difference, but you will feel the nvh is better on 45, while handling and steering precision is better on 40

this is extreme/semi slick category, not suitable for daily drive, unless you know how the tyres gonna behave in cold/hot/wet, dry drip is good but wet grip wont be as good as other cheaper UHP

with that price range you can get better UHP tyres that is more suitable for daily drive

I'm using hankook prime 3, is a budget uhp that does its job well, you might need to try it out different model yourself

There are many types you can choose for uhp, but I personally don't go for ps4, I rather go for cheaper uhp

Prime 3 is superior in dry but wet grip is not as good as dry, but I don't drive fast in rain, at most around 120kmh, just the lateral grip during wet is not that good

I bring the tyre to track and gymkhana, it is a very durable tyres

Actually you can get better tyres reviews at https://www.tyrereviews.com/

This post has been edited by amduser: Apr 11 2022, 08:26 PM

hankook now increased price by a lot, prime 3 (k125) is the replacement for v12 evo2, it cost around 300-330 per donut for 225/45/17, S1 evo3 (K127) is UHP around RM50 per donut more expensive than prime 3

last year i still managed to get prime 3 at rm275 per donut for 225/40/18, now is like RM350-380

unless you willing to try china, thailand or indonesia tyres, which you can still get them at cheap price, most of the mainstream brand price increased a lot lately

you can look for Westlake SA37 or rovelo A1 sport, but i have not tried these tyres before, but westlake review seems not bad, rovelo A1 is like prime 3, as long as you not high power car should be okay to use

same tyre pressure as your current tyres, most of the road tyres sweet spot is at 33-37 psi after warm up, when you go more than that you will notice the start will start to have screeching sound during cornering

you should adjust your tyre pressure according to your car weight, when your car are fully loaded you will need more pressure
my car is around 1360kg, when i go track i set to 33psi hot pressure for best traction, on road i use 35-38psi on warm

This post has been edited by amduser: Apr 13 2022, 10:21 PM

new tyres need time to run in to wear off the surface wax

at what speed you are getting hydroplaning? uneven road or road surface with too many skid marks from other cars can increase the chance of hydroplane too

no leaking air or 'pregnant' then no need to change, still okay to drive, since your wife already drove the car back and it didn't explode

i have encounter the same damage to my tyres before, the lip of the rim has a 5 cm scratch and a tear at the sidewall even longer than the picture above, end up i just keep driving and go race with it for a year+ till the thread worn out and replaced it

110km/h is so normal speed for me when driving around klang valley, after the tyre damaged, i still go 120-140km/h on kesas and 170km/h on karak with that tyres, 160+km/h on sepang circuit long straight

i can wear out a treadwear 320 tyres in just 2 years with rotation done, that's less than 30k mileage, how extreme you think i torture the tyres? and it still hasn't failed because of sidewall damaged

it is just a slightly deeper surface scratch, sidewall is not that weak

Since you have made up your mind then you can just go with your decision even though it will be ok to drive, when you change you need to change from left and right side, not just one piece