Car "floating", Hankook rear tires the issue?

hookson · 10-28-2022, 04:04 PM

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

krudmunk · 10-28-2022, 04:28 PM

Was your old one lowered or had aftermarket spring or coilovers? The OEM springs and shock are more on the comfortable/soft side.

hookson · 10-28-2022, 04:32 PM

Quote:

Originally Posted by krudmunk

Was your old one lowered or had aftermarket spring or coilovers? The OEM springs and shock are more on the comfortable/soft side.

No, it was stock suspension wise. Just had adaptive

mctigue3 · 10-28-2022, 09:52 PM

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

Is that M4 from NC? My buddy recently sold his 2015 AY M4 with around the same mileage. Bone stock except for tint and the front reflector delete

hookson · 10-28-2022, 09:53 PM

Quote:

Originally Posted by mctigue3

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

Is that M4 from NC? My buddy recently sold his 2015 AY M4 with around the same mileage. Bone stock except for tint and the front reflector delete

Nope, this one from Arizona

TractionControlDelete · 10-28-2022, 10:01 PM

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

The recommended tire pressure is 32 psi. Start there then report results. The door sticker for a car will always give the appropriate recommended PSI for street driving on the OEM tires. Obviously the rears are not OEM in your case but 40 psi is very obviously too high.

hookson · 10-28-2022, 10:04 PM

Quote:

Originally Posted by TractionControlDelete

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

The recommended tire pressure is 32 psi. Start there then report results.

32 same thing. I found a lot of people complaining the same thing on these Hankook tires. Will try to put used PSS on rear tomorrow. Hopefully it will bring back ///M feel.

Btw my old m4

TractionControlDelete · 10-28-2022, 10:06 PM

Quote:

Originally Posted by hookson

Quote:

Originally Posted by TractionControlDelete

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

The recommended tire pressure is 32 psi. Start there then report results.

32 same thing. I found a lot of people complaining the same thing on these Hankook tires. Will try to put used PSS on rear tomorrow. Hopefully it will bring back ///M feel.

Btw my old m4

Helpful info… Skip the PSS and proceed to PS4S.

What happened though???

hookson · 10-28-2022, 10:09 PM

Quote:

Originally Posted by TractionControlDelete

Quote:

Originally Posted by hookson

Quote:

Originally Posted by TractionControlDelete

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

The recommended tire pressure is 32 psi. Start there then report results.

32 same thing. I found a lot of people complaining the same thing on these Hankook tires. Will try to put used PSS on rear tomorrow. Hopefully it will bring back ///M feel.

Btw my old m4

Helpful info… Skip the PSS and proceed to PS4S.

What happened though???

Want to match the fronts) honestly PS4S and PSS feels the same to me.

Combined result of:
1. Me being stupid and doing stupid things on the road
2. Cold Falken Azenis tires
3. Cold ceramic pads (Powerstop)
4. MDM codes to GTS version

Lucky to be alive tbh

TractionControlDelete · 10-28-2022, 10:15 PM

Quote:

Originally Posted by hookson

Quote:

Originally Posted by TractionControlDelete

Quote:

Originally Posted by hookson

Quote:

Originally Posted by TractionControlDelete

Quote:

Originally Posted by hookson

Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard.

Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road.

Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around.

Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol

Thanks

The recommended tire pressure is 32 psi. Start there then report results.

32 same thing. I found a lot of people complaining the same thing on these Hankook tires. Will try to put used PSS on rear tomorrow. Hopefully it will bring back ///M feel.

Btw my old m4

Helpful info… Skip the PSS and proceed to PS4S.

What happened though???

Want to match the fronts) honestly PS4S and PSS feels the same to me.

Combined result of:
1. Me being stupid and doing stupid things on the road
2. Cold Falken Azenis tires
3. Cold ceramic pads (Powerstop)
4. MDM codes to GTS version

Lucky to be alive tbh

Well buddy, I'm glad you made it out to make these posts 💪

Looking forward to your feedback after the switch

TopJimmy · 10-29-2022, 07:58 AM

Damn!

Glad you're okay!!

Cold track tires… I'll watch out, since I have the Azenis too. My R888Rs sucked in the cold too.

b_w. · 10-29-2022, 08:36 AM

What do you consider cold weather for the azenis? Looking at a set for next spring here up north.

TopJimmy · 10-29-2022, 05:59 PM

Quote:

Originally Posted by b_w.

What do you consider cold weather for the azenis? Looking at a set for next spring here up north.

I say cold is 49F and down, and 50-60F is bearable.

krudmunk · 10-31-2022, 11:08 AM

I think non adaptive suspension is very similar to adaptive sport setting. I'd suggest you lower your tire psi down to 32 psi and see how it feels. Possible that your 40 psi is making your tires too stiff and you feel more bouncy.

TopJimmy · 10-31-2022, 11:21 AM

I run 32PSI cold pressure on my track tires when on the street, and 28PSI WARM only for digs. On track I target 32PSI hot.

Anything above 35-38 on street and you float on the middles, and have much less grip. Cold makes it worse.

I'm on custom fit Signatures with Falken Azenis in 265/35/19 and 315/30/19.

10-28-2022, 04:04 PM	#1
hookson Private First Class 88 Rep 131 Posts Drives: M4 2015, M5 2019 Join Date: Apr 2019 Location: Aventura, FL iTrader: (0)	Hey guys, just picked up AY 25,000 miles M4 2015 for my gf. All is well except the fact the car kind of flexes/floats on 80+ mph speed when changing lanes in a spirited fashion or accelerating hard. Car has PPS on front and Hankook Ventus v12 something on rear. Rear tires are new, but I have already driven 1200 miles on them. Tried changing pressure for 40 psi on rears, doesn't really change anything much, still wiggles to much on the road. Could it be the tires? My previous M4 didn't have such an issue, it had PSS all around. Oh and one thing I forgot to mention. This car has standard non adaptive suspension, while my old one had adaptive. Hopefully this is not the reason for it float lol Thanks Attached Images
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10-28-2022, 04:28 PM	#2
krudmunk Captain 343 Rep 828 Posts Drives: F80 M3 Join Date: Apr 2020 Location: San Francisco iTrader: (3)	Was your old one lowered or had aftermarket spring or coilovers? The OEM springs and shock are more on the comfortable/soft side.
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10-29-2022, 07:58 AM	#11
TopJimmy Major General 5496 Rep 5,181 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	Damn! Glad you're okay!! Cold track tires… I'll watch out, since I have the Azenis too. My R888Rs sucked in the cold too. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
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10-29-2022, 08:36 AM	#12
b_w. Lieutenant 424 Rep 552 Posts Drives: F80 M3 Join Date: Jul 2022 Location: Alberta iTrader: (0)	What do you consider cold weather for the azenis? Looking at a set for next spring here up north.
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10-31-2022, 11:08 AM	#14
krudmunk Captain 343 Rep 828 Posts Drives: F80 M3 Join Date: Apr 2020 Location: San Francisco iTrader: (3)	I think non adaptive suspension is very similar to adaptive sport setting. I'd suggest you lower your tire psi down to 32 psi and see how it feels. Possible that your 40 psi is making your tires too stiff and you feel more bouncy.
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10-31-2022, 11:21 AM	#15
TopJimmy Major General 5496 Rep 5,181 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	I run 32PSI cold pressure on my track tires when on the street, and 28PSI WARM only for digs. On track I target 32PSI hot. Anything above 35-38 on street and you float on the middles, and have much less grip. Cold makes it worse. I'm on custom fit Signatures with Falken Azenis in 265/35/19 and 315/30/19. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
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