305/30/20 PS4's installed on Coupe + Dinan = bliss
#51
I just changed to PS4 305/30r20 in the back and man it's a diffrence from the stock 285 wich in my openion looks terrible with the strech tire and dont grip at all. But i am lowerd on H&R adjustable springs and H&R 13mm spacers in the back and 15mm front and i had to raise it in the back and remove the spacers because it keept rubbing the flare(stone guard) or what you call the black plastic on the rear bumper
#53
Super Member
I have yet to read about anyone fitting (or even trying, for that matter) 275/35/19s in the front.
#54
Super Member
265/35/19 fronts and 305/30/20 rears on a coupe, on OEM rims, in a Michelin PS4 (tire size varies between manufacturers) fit perfectly, as is. I'm on stock suspension/setup, and the thicker sidewall really fills the wheel gap nicely
I have yet to read about anyone fitting (or even trying, for that matter) 275/35/19s in the front.
I have yet to read about anyone fitting (or even trying, for that matter) 275/35/19s in the front.
#55
Super Member
Generally speaking, if you're only doing tires, no. Just mount & roadforce balance. Having said that, any GOOD tire shop should be looking at your wear pattern on the car, and if it's abnormal, I'd at least do an alignment check. If it's within specs, I wouldn't touch it.
Also, it's been a few months, but I'm pretty sure my front inners were worn a lot more than the outers (to the point that you could see cords on the inner aspect of the front wheels), but that type of pattern wear is normal due to the aggressive negative camber Mercedes runs on our cars. It makes the steering much more responsive, but comes at the cost of somewhat premature tire wear. Rears IIRC were worn evenly I think.
Also, it's been a few months, but I'm pretty sure my front inners were worn a lot more than the outers (to the point that you could see cords on the inner aspect of the front wheels), but that type of pattern wear is normal due to the aggressive negative camber Mercedes runs on our cars. It makes the steering much more responsive, but comes at the cost of somewhat premature tire wear. Rears IIRC were worn evenly I think.
#56
So had enough of the tires that came with the car 6000miles on it.. Upgraded front and rear.. I feel I want to send a bill to AMG as these should have come out to factory like this.. Now I feel that the car is not trying to kill me everywhere I go..
2018 AMG C63S - Stock Suspension
265/35/19 PS4
305/30/20 PS4
2018 AMG C63S - Stock Suspension
265/35/19 PS4
305/30/20 PS4
The following 2 users liked this post by JSLoz:
Cyberzolot (04-17-2019),
jj18 (05-25-2019)
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JSLoz (04-16-2019)
#60
Super Member
this is why i dont understand how ppl with all these mods and tunes on the car drive around when even stock I cant put the power down :/
#61
Senior Member
I just had PS4 installed on my 2017 Coupe yesterday. I ended up going with 265/35/19 front and 295/30/20 rear.
They fit perfectly and drive much better than the Michelin Super Sports that came on the car. The installers told me that I could have fit 275 front and 305 rears.
They fit perfectly and drive much better than the Michelin Super Sports that came on the car. The installers told me that I could have fit 275 front and 305 rears.
#63
Senior Member
So had enough of the tires that came with the car 6000miles on it.. Upgraded front and rear.. I feel I want to send a bill to AMG as these should have come out to factory like this.. Now I feel that the car is not trying to kill me everywhere I go..
2018 AMG C63S - Stock Suspension
265/35/19 PS4
305/30/20 PS4
2018 AMG C63S - Stock Suspension
265/35/19 PS4
305/30/20 PS4
The following users liked this post:
Cuts (05-13-2020)
The following users liked this post:
jj18 (05-26-2019)
#66
At a TireRack recommended installer in the area. The circumference change is very close between those two sizes and their stock counterparts though. I think 2.3% larger in front and 1.9% in rear IIRC. Shouldn't cause any issues with the stability systems and from what I'm told they won't rub. We shall see. PS4S by the way.
The following users liked this post:
jj18 (05-27-2019)
#67
305/30/20 R, 275/35/19 F
There's a tiny bit of rub going up steep driveways, but I think it might go away once I let some air out of the tires. The tire shop wayyyy overinflated them (47PSI all around). Can't really give driving impressions until I bleed them out a bit, but the ride is already smoother even that inflated. The wheelgap is worlds better. Almost looks lowered just from the tires.
There's a tiny bit of rub going up steep driveways, but I think it might go away once I let some air out of the tires. The tire shop wayyyy overinflated them (47PSI all around). Can't really give driving impressions until I bleed them out a bit, but the ride is already smoother even that inflated. The wheelgap is worlds better. Almost looks lowered just from the tires.
#68
Let air out to about 38 all around today. Wow is there a lot more grip. I didn't think 0.8 inches on each side would do that much, but I have a feeling the actual contact patch has to be wider on the PS4S or something. Unless this tire is just that much better. Spin is far more controlled even with TC off. I wouldn't be surprised if just the 305s would shave 0.2-0.3s off the 1/4 ET.
I wouldn't go thinner in the front. The steering is definitely heavier, as should be expected, but this car already has a bit of understeer and if you go wider in the rear without widening the fronts you're going to make that balance even more understeer-biased. Feels great with this size and looks amazing. These should have come on the car.
I wouldn't go thinner in the front. The steering is definitely heavier, as should be expected, but this car already has a bit of understeer and if you go wider in the rear without widening the fronts you're going to make that balance even more understeer-biased. Feels great with this size and looks amazing. These should have come on the car.
#69
Member
305/30/20 R, 275/35/19 F
There's a tiny bit of rub going up steep driveways, but I think it might go away once I let some air out of the tires. The tire shop wayyyy overinflated them (47PSI all around). Can't really give driving impressions until I bleed them out a bit, but the ride is already smoother even that inflated. The wheelgap is worlds better. Almost looks lowered just from the tires.
There's a tiny bit of rub going up steep driveways, but I think it might go away once I let some air out of the tires. The tire shop wayyyy overinflated them (47PSI all around). Can't really give driving impressions until I bleed them out a bit, but the ride is already smoother even that inflated. The wheelgap is worlds better. Almost looks lowered just from the tires.
#70
Hasn't rubbed since I let air out. Only rubbed twice very mildly before, when I was going up some giant SF driveway entrances that had the car on 3 wheels. No rubbing over big bumps when driving or at full-lock turns. I'm taking the car up to Sonoma for the speed festival this weekend so I'll report back with some extended driving experience.
#71
Member
Hasn't rubbed since I let air out. Only rubbed twice very mildly before, when I was going up some giant SF driveway entrances that had the car on 3 wheels. No rubbing over big bumps when driving or at full-lock turns. I'm taking the car up to Sonoma for the speed festival this weekend so I'll report back with some extended driving experience.
Anyhow... your car looks superb.
#72
Thanks for testing this out and the response. I also have to say.. I’m starting to kinda miss the prefacelift grill.. sounds crazy but there are times I want to put it back to the way it was. I always loved the way the prefacelift grill looked until the 43s were assigned that grill. That is what drove the need to change for me.
Anyhow... your car looks superb.
Anyhow... your car looks superb.
To give a bit of an update, I haven't rubbed once since letting air out to normal pressure levels and the grip is vastly superior. Drove probably ~150 miles on various road qualities and bumps, full-lock turns, etc. In S+ the TCS still kicks in in first, but only a little and isn't nearly as intrusive. Second just grips and goes. Handling wise I enjoy the steering feel more now than I did, it feels more sporty and heavy. Ride quality is much better too.
#73
Thanks! I'm actually putting on a Brabus front lip and carbon grill this coming week.
To give a bit of an update, I haven't rubbed once since letting air out to normal pressure levels and the grip is vastly superior. Drove probably ~150 miles on various road qualities and bumps, full-lock turns, etc. In S+ the TCS still kicks in in first, but only a little and isn't nearly as intrusive. Second just grips and goes. Handling wise I enjoy the steering feel more now than I did, it feels more sporty and heavy. Ride quality is much better too.
To give a bit of an update, I haven't rubbed once since letting air out to normal pressure levels and the grip is vastly superior. Drove probably ~150 miles on various road qualities and bumps, full-lock turns, etc. In S+ the TCS still kicks in in first, but only a little and isn't nearly as intrusive. Second just grips and goes. Handling wise I enjoy the steering feel more now than I did, it feels more sporty and heavy. Ride quality is much better too.
#75