305 PS4S grip off the scale

M5Rick · 03-22-2019, 12:26 PM

Put about 200 miles on my 305's since being fitted and in comparison with the old 295 SS's well, there is not a lot.The car slingshots forward from the lights as if was being let go from a giant sling that was holding it,I've never gone so fast forward even comparing it to a C63 I drove at MW

RPiM5 · 03-22-2019, 12:55 PM

Quote:

Originally Posted by M5theonlyone

Put about 200 miles on my 305's since being fitted and in comparison with the old 295 SS's well, there is not a lot.The car slingshots forward from the lights as if was being let go from a giant sling that was holding it,I've never gone so fast forward even comparing it to a C63 I drove at MW

Lol! I'm running the same 305 tires. I still have trouble getting traction, but the performance in the rain is vastly improved.

Seattle996 · 03-22-2019, 12:55 PM

Man... thats fantastic to hear. I have 305 super sports and they just can't handle the power even with the wider footprint.

I am piggy back tuned by ActiveAutowerks, maybe thats the issue.

carlitosgomesm5 · 03-22-2019, 12:56 PM

So you are saying that putting 305s in the front give a ton more grip? My wife complaints all the time how a little bit of accelaration and how the traction control kicks in as the wheels start spinning. i tell her the car just has too much power... i wonder if the 305s will make that a little better. Do you have any spacers?

Dwaynos · 03-22-2019, 01:03 PM

Yeah, the 305s are and excellent tyre. I don't think the pilot ss are as good so the 4s is the way to go if you don't want a track tyre. The car still spins easily sometimes but that's the nature of the beast. If you get a half decent road on a warmish day you can put all of 2nd down and feels like an awd car.

M5Rick · 03-22-2019, 01:06 PM

Quote:

Originally Posted by carlitosgomesm5

So you are saying that putting 305s in the front give a ton more grip? My wife complaints all the time how a little bit of accelaration and how the traction control kicks in as the wheels start spinning. i tell her the car just has too much power... i wonder if the 305s will make that a little better. Do you have any spacers?

5mm spacers just on the rear and with the extra 5mm from the tyres that's enough for me.Stick to going 275's on the front.

carlitosgomesm5 · 03-22-2019, 02:05 PM

Thanks guys will keep that in mind for my next tyres. Have 2 295s spares in my garage so might be a while unless i find a good deal and sell the ones i have spare. May then need to drop the spacers to 5mm too from 12mm.

M5Rick · 03-25-2019, 01:12 PM

Just a quick recap DON'T FORGET to re torque lug nuts after 200 mi.Just done mine and they needed it: 140nm.

Dwaynos · 03-25-2019, 01:45 PM

Quote:

Originally Posted by M5theonlyone

Just a quick recap DON'T FORGET to re torque lug nuts after 200 mi.Just done mine and they needed it: 140nm.

This is most likely due to your spacers. I fitted mine at the weekend and don't like how they fit. Because the M5 wheel has a taper on the center, the 5mm spacer doesn't allow the wheel to sit on the hub. This allows all the stress of up and down force to move to the taper on the wheel bolts, eventually loosening them off. I am going to recheck mine in a few days and if there is any sign of loosening, the spacers are coming off.

I have never had to re-torque a wheel on anything but a truck.

M5Rick · 03-25-2019, 01:50 PM

Quote:

Originally Posted by Dwaynos

This is most likely due to your spacers. I fitted mine at the weekend and don't like how they fit. Because the M5 wheel has a taper on the center, the 5mm spacer doesn't allow the wheel to sit on the hub. This allows all the stress of up and down force to move to the taper on the wheel bolts, eventually loosening them off. I am going to recheck mine in a few days and if there is any sign of loosening, the spacers are coming off.

I have never had to re-torque a wheel on anything but a truck.

Make sure the flat face of the spacer is on the wheel.

Dwaynos · 03-25-2019, 02:00 PM

Quote:

Originally Posted by M5theonlyone

Make sure the flat face of the spacer is on the wheel.

Unsure what you mean there.

M5Rick · 03-25-2019, 05:55 PM

Quote:

Originally Posted by Dwaynos

Unsure what you mean there.

On my spacers there is a flat face and on the other side there are channels, the channels go to the hub.

Dwaynos · 03-26-2019, 03:03 AM

Quote:

Originally Posted by M5theonlyone

On my spacers there is a flat face and on the other side there are channels, the channels go to the hub.

Mine are different one side is completely flat and the other has a slight taper in the middle which is facing the hub. You mentioned in a previous post that you had to help the mechanic put your wheel on, this is due to the wheel no longer sitting on the hub center.

Craze · 03-26-2019, 03:26 AM

Do 305 fit on stock 343m rims? No rubbing or need spacers?

Dwaynos · 03-26-2019, 04:14 AM

Quote:

Originally Posted by Craze

Do 305 fit on stock 343m rims? No rubbing or need spacers?

They fit perfect. No rubbing and no need for spacers.

RAFiK - BMWClubUAE · 03-26-2019, 04:15 AM

Quote:

Originally Posted by Craze

Do 305 fit on stock 343m rims? No rubbing or need spacers?

As replied to you in the other thread.

I have Michelin PS4S 305 in the rear and they fit perfectly, and the grip is phenomenal.

Huge improvement coming from 295

M5Rick · 03-26-2019, 04:35 AM

Quote:

Originally Posted by Dwaynos

Mine are different one side is completely flat and the other has a slight taper in the middle which is facing the hub. You mentioned in a previous post that you had to help the mechanic put your wheel on, this is due to the wheel no longer sitting on the hub center.

As long as the spacers are 5x120 PCD they are fine, the pitch circle diameter ensures the spacer and wheel are central regardless of the slight taper in the middle.

Craze · 03-26-2019, 09:50 AM

Quote:

Originally Posted by Dwaynos

They fit perfect. No rubbing and no need for spacers.

Thanks

Can i run spacers? Currently have 12mm front and rear

Dwaynos · 03-26-2019, 02:04 PM

Quote:

Originally Posted by M5theonlyone

As long as the spacers are 5x120 PCD they are fine, the pitch circle diameter ensures the spacer and wheel are central regardless of the slight taper in the middle.

I understand what you are saying. All I mean is that in the past I have seen many wheels come loose due to fitting without a spigot ring when the wheel centre is to big for the hub. This is the exact thing we have going on now due to the taper on the wheel. It's now to big for the hub.

M5Rick · 03-26-2019, 02:10 PM

Quote:

Originally Posted by Dwaynos

I understand what you are saying. All I mean is that in the past I have seen many wheels come loose due to fitting without a spigot ring when the wheel centre is to big for the hub. This is the exact thing we have going on now due to the taper on the wheel. It's now to big for the hub.

Alright I'll keep an eye on mine and if they do need torquing I'll say and you report back on yours too.

Hasser · 03-26-2019, 04:41 PM

Quote:

Originally Posted by M5theonlyone

Quote:

Originally Posted by carlitosgomesm5

So you are saying that putting 305s in the front give a ton more grip? My wife complaints all the time how a little bit of accelaration and how the traction control kicks in as the wheels start spinning. i tell her the car just has too much power... i wonder if the 305s will make that a little better. Do you have any spacers?

5mm spacers just on the rear and with the extra 5mm from the tyres that's enough for me.Stick to going 275's on the front.

Are you running the 305 on the stock 10j rear wheel 343M?
Also what's the load rating you went for? 99 or 101?

induc916 · 03-26-2019, 05:26 PM

I have no traction sometimes in 3rd-4th even. That's running 305 PS4S on 343 rims F13 M6, with the upgrades i just got i'm moving to 315/30/20 R888R

03-22-2019, 12:26 PM	#1
M5Rick General 59630 Rep 19,450 Posts Drives: M5 F10 DCT Gunmetal Join Date: Aug 2018 Location: Southern England iTrader: (0)	305 PS4S grip off the scale Put about 200 miles on my 305's since being fitted and in comparison with the old 295 SS's well, there is not a lot.The car slingshots forward from the lights as if was being let go from a giant sling that was holding it,I've never gone so fast forward even comparing it to a C63 I drove at MW
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03-22-2019, 12:55 PM	#3
Seattle996 Private 72 Rep 96 Posts Drives: F10 M5 6MT Join Date: Sep 2016 Location: Seattle iTrader: (1)	Man... thats fantastic to hear. I have 305 super sports and they just can't handle the power even with the wider footprint. I am piggy back tuned by ActiveAutowerks, maybe thats the issue. __________________ F10 M5 6spd - Real Drivers Use 3 Pedels - BPM Tuned - SOUL Exhaust - aFe Intake - 21" AG M590 on MPS4S Tires B9 Audi SQ5 FZJ80 Toyota Land Cruiser
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03-22-2019, 12:56 PM	#4
carlitosgomesm5 Second Lieutenant 226 Rep 201 Posts Drives: F10 M5 Join Date: Nov 2018 Location: New Jersey iTrader: (1)	So you are saying that putting 305s in the front give a ton more grip? My wife complaints all the time how a little bit of accelaration and how the traction control kicks in as the wheels start spinning. i tell her the car just has too much power... i wonder if the 305s will make that a little better. Do you have any spacers?
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03-22-2019, 01:03 PM	#5
Dwaynos Captain 380 Rep 948 Posts Drives: F10 M5 Monte Carlo Blue Join Date: May 2018 Location: UK iTrader: (0)	Yeah, the 305s are and excellent tyre. I don't think the pilot ss are as good so the 4s is the way to go if you don't want a track tyre. The car still spins easily sometimes but that's the nature of the beast. If you get a half decent road on a warmish day you can put all of 2nd down and feels like an awd car.
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03-22-2019, 02:05 PM	#7
carlitosgomesm5 Second Lieutenant 226 Rep 201 Posts Drives: F10 M5 Join Date: Nov 2018 Location: New Jersey iTrader: (1)	Thanks guys will keep that in mind for my next tyres. Have 2 295s spares in my garage so might be a while unless i find a good deal and sell the ones i have spare. May then need to drop the spacers to 5mm too from 12mm.
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03-25-2019, 01:12 PM	#8
M5Rick General 59630 Rep 19,450 Posts Drives: M5 F10 DCT Gunmetal Join Date: Aug 2018 Location: Southern England iTrader: (0)	Just a quick recap DON'T FORGET to re torque lug nuts after 200 mi.Just done mine and they needed it: 140nm.
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03-26-2019, 03:26 AM	#14
Craze Captain 161 Rep 687 Posts Drives: M5 E60, M5 F10, X5 50i Join Date: Oct 2017 Location: Australia iTrader: (0)	Do 305 fit on stock 343m rims? No rubbing or need spacers?
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03-26-2019, 05:26 PM	#22
induc916 Second Lieutenant 116 Rep 248 Posts Drives: 2014 M6 Join Date: Mar 2018 Location: Indiana iTrader: (0)	I have no traction sometimes in 3rd-4th even. That's running 305 PS4S on 343 rims F13 M6, with the upgrades i just got i'm moving to 315/30/20 R888R __________________ 14 M6 Sakhir Coupe \| RK Autowerks Built Motor \| G25-660 \| Snow Performance Meth \| RK DP \| 4mm bored throttle bodies \| SSP-X \| SSP Trans Pan \| RK Billet Diff Mount \| DSS Axles \| Rkautowerks carbon charge pipes \| CSF Intercoolers \|Akro exhaust \| Gapped Plugs \|RK intakes \| 900whp/930wtq
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