recommended tire pressure (17"-winter)

neo871 · 11-27-2008, 10:59 AM

Just mounted my winter wheel setup which is BMW style 285 rims with Dunlop WinterSport 3D 225/45/17 tires non-RFT and the first think i noticed was how soft and comfortable the ride was, switching from 18" RFT to 17" non-RFT make a huge difference!

Anyway, the problem is that i don't know what tire pressure to use for this setup, any ideas?

Ant Man · 11-29-2008, 03:35 PM

Have you looked in the manual?

E92Fan · 11-29-2008, 03:48 PM

Quote:

Originally Posted by neo871

Just mounted my winter wheel setup which is BMW style 285 rims with Dunlop WinterSport 3D 225/45/17 tires non-RFT and the first think i noticed was how soft and comfortable the ride was, switching from 18" RFT to 17" non-RFT make a huge difference!

Anyway, the problem is that i don't know what tire pressure to use for this setup, any ideas?

You need to up the pressures a little from the standard 17" recommendations, as the winter tyres are considerably softer with more flex in the sidewalls. Having not run 17" wheels before on our cars, I can't really give any suggestion, although it might say on the tyre pressure plate on the inside of the driver's door ??

willhollin · 11-29-2008, 03:52 PM

I was going to say post this on the US tyre section but you already have.

(PS Tony, what would you run 235/40/18 & 265/35/18 Goodyear F1s Assymmetrics pressure wise? )

E92Fan · 11-29-2008, 04:02 PM

oooh. don't know that either off hand, as I haven't used 18s... I would suggest 1-2psi above what BMW recommends for your car with two people and luggage (so not fully loaded).. Again, the F1s have softer sidewalls than RFTs so you need to compensate a little for the additional flex.

willhollin · 11-29-2008, 04:17 PM

Quote:

Originally Posted by E92Fan

oooh. don't know that either off hand, as I haven't used 18s... I would suggest 1-2psi above what BMW recommends for your car with two people and luggage (so not fully loaded).. Again, the F1s have softer sidewalls than RFTs so you need to compensate a little for the additional flex.

Seeing as you know most things BMW I will forgive you on this occasion.

I have them at 40 front and 42 back, seems good to me. I went up a size as you suggested a-la Alpina. I might go look over on their forum.

E92Fan · 11-29-2008, 04:21 PM

Most of the D3/B3s came with 19" wheels in this country - using 2.6/2.7 bar front/rear (or 37.7 and 39.2psi respectively)

SoYank · 11-30-2008, 05:09 AM

Quote:

Originally Posted by E92Fan

Most of the D3/B3s came with 19" wheels in this country - using 2.6/2.7 bar front/rear (or 37.7 and 39.2psi respectively)

Tony, I'm glad you didn't say 263.45/273.58 KPa. I'd be tearing out my hair.

neo871 · 12-01-2008, 03:36 AM

on the door sticker it says 36 front and 43.5 rear, isn't that strange? i mean why such a big difference between front and rear?

SoYank · 12-01-2008, 01:16 PM

Quote:

Originally Posted by neo871

on the door sticker it says 36 front and 43.5 rear, isn't that strange? i mean why such a big difference between front and rear?

Climate change.

neo871 · 12-01-2008, 01:43 PM

what do you mean?

booforty · 12-01-2008, 01:50 PM

Yes Andrei, I agree, that looks strange...

The best thing to do is experiment with different pressures and see what feels the best

neo871 · 12-03-2008, 01:51 PM

i will do that an see if i feel any difference....

11-27-2008, 10:59 AM	#1
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	recommended tire pressure (17"-winter) Just mounted my winter wheel setup which is BMW style 285 rims with Dunlop WinterSport 3D 225/45/17 tires non-RFT and the first think i noticed was how soft and comfortable the ride was, switching from 18" RFT to 17" non-RFT make a huge difference! Anyway, the problem is that i don't know what tire pressure to use for this setup, any ideas?
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11-29-2008, 03:35 PM	#2
Ant Man Major 75 Rep 1,179 Posts Drives: E92 M3 Individual Edition Join Date: Jun 2008 Location: East Anglia iTrader: (1)	Have you looked in the manual?
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11-29-2008, 03:52 PM	#4
willhollin Major General 268 Rep 9,915 Posts Drives: VW T5 Join Date: Apr 2008 Location: Worcestershire iTrader: (1) Garage List 2007 BMW E92 330d SE [10.00] 2010 Transporter T5 ... [0.00]	I was going to say post this on the US tyre section but you already have. (PS Tony, what would you run 235/40/18 & 265/35/18 Goodyear F1s Assymmetrics pressure wise? )
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11-29-2008, 04:02 PM	#5
E92Fan Moderator 322 Rep 5,493 Posts Drives: . Join Date: Aug 2007 Location: . iTrader: (0)	oooh. don't know that either off hand, as I haven't used 18s... I would suggest 1-2psi above what BMW recommends for your car with two people and luggage (so not fully loaded).. Again, the F1s have softer sidewalls than RFTs so you need to compensate a little for the additional flex. __________________ ... ... ... DMS Remap Review ----- Quaife LSD Review ----- Hartge Antiroll Bars Review ----- Bilstein PSS10 B16 Ride Control Review ----- Detail by ShineOn ----- Paintshield Review
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11-29-2008, 04:21 PM	#7
E92Fan Moderator 322 Rep 5,493 Posts Drives: . Join Date: Aug 2007 Location: . iTrader: (0)	Most of the D3/B3s came with 19" wheels in this country - using 2.6/2.7 bar front/rear (or 37.7 and 39.2psi respectively) __________________ ... ... ... DMS Remap Review ----- Quaife LSD Review ----- Hartge Antiroll Bars Review ----- Bilstein PSS10 B16 Ride Control Review ----- Detail by ShineOn ----- Paintshield Review
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12-01-2008, 03:36 AM	#9
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	on the door sticker it says 36 front and 43.5 rear, isn't that strange? i mean why such a big difference between front and rear?
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12-01-2008, 01:43 PM	#11
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	what do you mean?
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12-01-2008, 01:50 PM	#12
booforty Major General 333 Rep 8,811 Posts Drives: E92 M3 Join Date: Mar 2005 Location: London, UK iTrader: (0) Garage List 2008 E92 M3 [0.00]	Yes Andrei, I agree, that looks strange... The best thing to do is experiment with different pressures and see what feels the best
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12-03-2008, 01:51 PM	#13
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	i will do that an see if i feel any difference....
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