[Erik]

What to choose guys.

I read on the ALPINA site that it was difficult to get tires that was alowed on our car.


We have ordered the Goodyear GS-3 F1....... I think the load label is 94Y.... can this tire take the potential +300 kph speed?


The tire is no in the shop but we are not sure anymore if this tire is as good as we belived.

We have it also on our B7 and until 2 weeks ago we was very happy. But then on a long trip the rear tire suddenly just "fell" of the rim. It slid of the inside on the rear right tire. No puncture, no low airpressure and no aparent damage to the wheel. Just the damage that occured when the tire slid of the rim ( the tire slipped in towards the center of the rim)

We got two new rear tires, but I did not like this. Imaging this happening in +200 kph in the B12.....

Any advice or have any heard about such an incident ?

 

[hythe]

I'm running the same rims on Rommel at the moment, running Pirelli P-Zero Rossos - should be able to cope with those sorts of speeds...

 

[Cor-Jan]

Currently in doubt of putting new Bridgstones or Michelins on the BT.

 

[alpinab846]

If you can get a pair of S03 PP go for it-it is the perfect tire....

 

[Stevie]

We have ordered the Goodyear GS-3 F1....... I think the load label is 94Y.... can this tire take the potential +300 kph speed?

http://www.m5board.com/vbulletin/showthread.php?t=57054

I've seen and heard too many Eagle F1 GS-D3's blow up for no apparant reason. They're standard fitment on a Peugeot 206CC and I wouldn't fit them on anything heavier. Just my $.02.... Member Iljah just suffered a blowout @130MPH after a month!!!!!

According http://www.m5board.com/alpina/8-series.htm we're looking for 245/40 and 285/35 18, and as far as I can see Pirelli is the only manufacturer to offer both front and rear sizes with loadindex 97Y. Conti offers a rear 101Y, but only combined with a 93Y front, and that's where the weight is. I'm with Hythe on this one and I'd get myself a nice set of PZeroRosso's if I were you....

(As you can see in my sig, I use them on my own car and LOVE them. Couldn't find PS2 at the time, but stopped searching after trying these!!!)

Load index figures:

90 600kg
91 615
92 630
93 650
94 670
95 690
96 710
97 730
98 750
99 775
100 800
101 825
102 850
103 875
104 900
105 925
106 950
107 975
108 1000
109 1030
110 1060
111 1090
112 1120kg

 

[Erik]

http://www.m5board.com/vbulletin/showthread.php?t=57054

I've seen and heard too many Eagle F1 GS-D3's blow up for no apparant reason. They're standard fitment on a Peugeot 206CC and I wouldn't fit them on anything heavier. Just my $.02.... Member Iljah just suffered a blowout @130MPH after a month!!!!!

According http://www.m5board.com/alpina/8-series.htm we're looking for 245/40 and 285/35 18, and as far as I can see Pirelli is the only manufacturer to offer both front and rear sizes with loadindex 97Y. Conti offers a rear 101Y, but only combined with a 93Y front, and that's where the weight is. I'm with Hythe on this one and I'd get myself a nice set of PZeroRosso's if I were you....

(As you can see in my sig, I use them on my own car and LOVE them. Couldn't find PS2 at the time, but stopped searching after trying these!!!)

Load index figures:

90 600kg
91 615
92 630
93 650
94 670
95 690
96 710
97 730
98 750
99 775
100 800
101 825
102 850
103 875
104 900
105 925
106 950
107 975
108 1000
109 1030
110 1060
111 1090
112 1120kg

Do you know where this tire was bought. Goodyear is know to produce several different tires ( same name) depending on what marked it is going to be sold in. That means that many tire shops sell very cheap tires with the same name but the tire is actually not design for the load and speed that the tire for a marked like Germany.

Our F1 tire that fell of the rim on the B7 was bought thrue an official Goodyear dealer, do you know if any of the other tires that has blown up is sold via official dealer or are they sold thrue "other" shops and there for could be of an " lesser" quality.

 

[Stevie]

Do you know where this tire was bought. Goodyear is know to produce several different tires ( same name) depending on what marked it is going to be sold in. That means that many tire shops sell very cheap tires with the same name but the tire is actually not design for the load and speed that the tire for a marked like Germany.

EXACTLY!!!! In The Netherlands it's very rare to find a GY F1 with an E stamp, most are the "bad" imports. Usually imported by 1 company, and distributed like a plaque over the whole country. The worst were the Bridgestone's with 48months+ DOT's from Germany with a hole shot in the side. They were supposed to be scrapped, but instead brought here by containerload, plugged and sold as new by grey import here........
Bridgestone NL was not happy, and with good reason!

 

[raymondw]

90 600kg
91 615
92 630
93 650
94 670
95 690
96 710
97 730
98 750
99 775
100 800
101 825
102 850
103 875
104 900
105 925
106 950
107 975
108 1000
109 1030
110 1060
111 1090
112 1120kg

I would like to add that for W and Y rated tyres, one has to derate these figures for the last speed range. An Y rated tyre is approved up until 300km/h, but only at 70% of the load index. 100% of th load index allows 'only' 270km/h. Enquire at the tyre manufacturer/distributor if they will warrant a tyre for the B12 5.7 at max speed.

 

[Stevie]

I would like to add that for W and Y rated tyres, one has to derate these figures for the last speed range. An Y rated tyre is approved up until 300km/h, but only at 70% of the load index.

850CSi weight is 1865kg (RDW-figure):

97Y all-round = 730kg x 4 x 0.7= 2044kg = VERY SLIM MARGIN!!!!!

97Y front = 730 x 2 x 0.7 = 1022
101Y rear = 825 x 2 x 0.7 = 1155
Total max load @ 300km/h = 2177kg still small margin, but better.

Checked the Pirelli website, a 101Y rear Rosso is available too. Makes sure all tyres are the XL (Extra Load) variety......

 

[kees]

850CSi weight is 1865kg (RDW-figure):

97Y all-round = 730kg x 4 x 0.7= 2044kg = VERY SLIM MARGIN!!!!!

Isn't that the empty weight of the car? I would assume you have to calculate the tire load with the maximum weight of the car.

 

[raymondw]

Isn't that the empty weight of the car? I would assume you have to calculate the tire load with the maximum weight of the car.

Usually, the car's weight is measured with an additional weight in the form of halve a tank of petrol. Still not enough to compensate for four persons and lugage.


BTW: Haven't heard a lot from you lately. I trust that everything is fine up North :thumbsup:

 

[Stevie]

Isn't that the empty weight of the car? I would assume you have to calculate the tire load with the maximum weight of the car.

Max-GVW is around 2300kg. So even with these Extra Load tires you'd still be 123kg overweight for the 270 to 300 km/h range....

97Y front = 730 x 2 x 0.7 = 1022
101Y rear = 825 x 2 x 0.7 = 1155
Total max load @ 300km/h = 2177kg

I'm also wondering if it's not pushing it to the edge on the front tires with 2 people in it...... Alpina usually uses Eibach springs, and the onlineTUV on Eibach's website states a max. axleload of:

1140kg front
1200kg rear.

The above stated 97Y front and 101Y rear XL-combo offered only by, as far as I can tell, Pirelli and Continental (Conti front "in preperation") is the closest there is. Now BMW's 250km/h limiter doesn't look so strange.........

BTW, according to the website Good-Year doesn't have a 285/35 18 F1, and looking at the rest of they're line, practicaly no decent XL versions.....

 

[Erik]

Hi guys, I really need your input on 1 thing

We got a call from the supplier of the Goodyear tire, after our fell of the rim it has been some activity at the importer.

Now, yesterday we got the info that they had given us the wrong tire pressure.

The pressure should be........ 41 pund front and 48 pund rear. Not sure about the relation between bar and pund.

Rear tire dim is 255/45 or 40 - 17" front 235/??-17....


Anyway this sounds totaly rubbish in my ears......., when I to to the track I normaly increase pressure to this level but I never use that much on the streets.


Any input ?

 

[kees]

Hi guys, I really need your input on 1 thing

We got a call from the supplier of the Goodyear tire, after our fell of the rim it has been some activity at the importer.

Now, yesterday we got the info that they had given us the wrong tire pressure.

The pressure should be........ 41 pund front and 48 pund rear. Not sure about the relation between bar and pund.

Rear tire dim is 255/45 or 40 - 17" front 235/??-17....


Anyway this sounds totaly rubbish in my ears......., when I to to the track I normaly increase pressure to this level but I never use that much on the streets.


Any input ?

1 psi = 0.069 bar

41 psi = 2.8 bar
48 psi = 3.3 bar

Seems quite high to me.

 

[Stevie]

Seems reasonable to me or such a heavy car.

Mine says 2.6 and 3.0 and it's a LOT lighter.

BTW, this car is on INCORRECT size rear tires. 255 on 9,5" is asking for trouble.

1 psi = 0.069 bar

41 psi = 2.8 bar
48 psi = 3.3 bar

Seems quite high to me.

 

[Erik]

Seems reasonable to me or such a heavy car.

Mine says 2.6 and 3.0 and it's a LOT lighter.

BTW, this car is on INCORRECT size rear tires. 255 on 9,5" is asking for trouble.

Dont forgett that this is on the B7, (E24 Coupe), this is a 1500 kg car.

 

[Stevie]

OK, sorry, I thought we were still dicussing the B12 ouich, can't help you there...

Dont forgett that this is on the B7, (E24 Coupe), this is a 1500 kg car.

 

[Erik]

OK, I think we will try to get Pirellis instead of the Goodyear.

Can anyone give some comments to the difference between the Rossos and the neros. I have been informed that Rossos are the tire to choose.

Do you guys agree?

 

[Cor-Jan]

I'm still in doubt what tires to put under the BT.I'm not tracking my car and won't use it in rain.What i want is comfort,grip,going straight at high speeds.

what tire is best for me?

regards, C-J

 

[Stevie]

I'm still in doubt what tires to put under the BT.I'm not tracking my car and won't use it in rain.What i want is comfort,grip,going straight at high speeds.

what tire is best for me?

regards, C-J

Hmmm, the only irritating thing about a Rosso is that when you park the car with very warm tires, and the tires cool of, you'll need to heat them pretty thouroughly before the flat-spot goes out. The difference between a Rosso and a Nero are explained on Pirelli's website. A Rosso a GT tire, a Nero for your track-slag.

C-J, the only manufacturer that has your 235/45 and 265/40 sizes in a matched set as far as I can see is Bridgestone with their S-03PP......