285/30 and 305/30 R19

CON G · 03-01-2013, 11:36 PM

Have I got this right?

285/30 and 305/30 R19 are the closest height match to
245/35 and 265/35 R19 and the closest front to rear stagger %?

Has anybody run a ZCP rim with these widths?

Most I have read is 265 & 295?

front wall rear wall rear/front
profile height width height ratio
35's 245 35 85.75 265 35 92.75 108%
30's 285 30 85.5 305 30 91.5 107%

Tuner1 · 03-02-2013, 12:24 PM

285/30 and 305/30 are way too wide for the stock ZCP wheels. That being said, on proper wheel sizes (10" or 10.5" F and 11" or 11.5" R) it is pretty much the ultimate tire combo for the E9X M3 chassis. I am thinking about trying it and am surprised that it hasn't been done before. Of course it will require wheels with the perfect offsets and more camber than stock but I know it can be done

///M Ryder · 03-02-2013, 01:27 PM

Quote:

Originally Posted by Tuner1

285/30 and 305/30 are way too wide for the stock ZCP wheels. That being said, on proper wheel sizes (10" or 10.5" F and 11" or 11.5" R) it is pretty much the ultimate tire combo for the E9X M3 chassis. I am thinking about trying it and am surprised that it hasn't been done before. Of course it will require wheels with the perfect offsets and more camber than stock but I know it can be done

+1......unless you are into the "muffin top" look

..............Phil

CON G · 03-02-2013, 10:38 PM

Thanks guys, at this stage I don't have the budget to look at rims and tyres. I will just try and get stickier R comps that are streetable with the stock sizes. I've used sports cups before will see if they have the appropriate size.

klammer · 03-02-2013, 11:44 PM

I know someone that runs a 285 square setup at the track so know that end will fit. Not sure about 305's without possible fender pulling, but as said earlier, would take the perfect combo of wheel size, offset, camber and even tire choice as some tires have more square or rounded edges to make that setup work. Would love to see it done though.

lukester · 03-03-2013, 04:49 AM

will do it. gimme some weeks.

Plan:
285/30-18 all around Michelin Pilot Cups
10x18 ET25 wheels (which will get a 5-10mm spacer front and 10-15mm rear).

here's a teaser of the tires. weight is shown in Kilogramm.
"my old" 265/35-18 Michelin Cup tires:

"the new" 285/30-18 Michelin Cup tires:

Both on one picture. 285/30-18 will be really tight on the front but it should work.

Dave07997S · 03-03-2013, 05:58 PM

Quote:

Originally Posted by lukester

will do it. gimme some weeks.

Plan:
285/30-18 all around Michelin Pilot Cups
10x18 ET25 wheels (which will get a 5-10mm spacer front and 10-15mm rear).

here's a teaser of the tires. weight is shown in Kilogramm.
"my old" 265/35-18 Michelin Cup tires:

"the new" 285/30-18 Michelin Cup tires:

Both on one picture. 285/30-18 will be really tight on the front but it should work.

A 285/30/18 is under 25", how does that work on a E92 M3?

Dave

Richbot · 03-03-2013, 07:49 PM

Plenty of racers running the 285/30-18 in various trims on e92 M3's with success

devotec · 03-10-2013, 12:11 PM

Quote:

Originally Posted by lukester

will do it. gimme some weeks.

Plan:
285/30-18 all around Michelin Pilot Cups
10x18 ET25 wheels (which will get a 5-10mm spacer front and 10-15mm rear).

here's a teaser of the tires. weight is shown in Kilogramm.
"my old" 265/35-18 Michelin Cup tires:

"the new" 285/30-18 Michelin Cup tires:

Both on one picture. 285/30-18 will be really tight on the front but it should work.

Oh perfect Lucian for max performance

think i will use the same size like you in front

motortrend · 03-12-2013, 07:35 PM

Will 295/30 r19 on the rear rub with stock ZCP?

///M Ryder · 03-12-2013, 07:53 PM

Quote:

Originally Posted by motortrend

Will 295/30 r19 on the rear rub with stock ZCP?

No

motortrend · 03-12-2013, 10:59 PM

Quote:

Originally Posted by ///M Ryder

No

Thanks, I was looking to get 285/30 PSS but they don't come in that size so I was between 275 and 295, but I am scared that 295s will rub under compression

m3peat · 03-13-2013, 12:02 AM

Quote:

Originally Posted by motortrend

Thanks, I was looking to get 285/30 PSS but they don't come in that size so I was between 275 and 295, but I am scared that 295s will rub under compression

I have 275/30 fronts and 295/30 rear Yoko AD08's with no rubbing with one passenger (haven't tried two passengers). I have stock ZCP's with no spacers. I would definitely do it again. I have 9k miles on them.

CON G · 03-13-2013, 04:42 AM

Think Im going to just run some R comp 275/30/R19 square, using stock ZCP's and look at getting some camber adjustment plates. Spotted some on the Apex website. That should do for the track for a little while. BPM tune has been ordered so I just have to wait for all the goodies to arrive :-)

03-01-2013, 11:36 PM	#1
CON G New Member Drives: 2010 M3 E90 M-DCT ZCP SSII Join Date: Feb 2013 Location: PERTH WESTERN AUSTRALIA Posts: 18 iTrader: (0) Garage List 2010 BMW E90 M3 [0.00]	285/30 and 305/30 R19 Have I got this right? 285/30 and 305/30 R19 are the closest height match to 245/35 and 265/35 R19 and the closest front to rear stagger %? Has anybody run a ZCP rim with these widths? Most I have read is 265 & 295? front wall rear wall rear/front profile height width height ratio 35's 245 35 85.75 265 35 92.75 108% 30's 285 30 85.5 305 30 91.5 107% __________________ Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the rear. Horsepower is how fast you hit the wall. Torque is how far you take the wall with you.
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03-02-2013, 10:38 PM	#4
CON G New Member Drives: 2010 M3 E90 M-DCT ZCP SSII Join Date: Feb 2013 Location: PERTH WESTERN AUSTRALIA Posts: 18 iTrader: (0) Garage List 2010 BMW E90 M3 [0.00]	Thanks guys, at this stage I don't have the budget to look at rims and tyres. I will just try and get stickier R comps that are streetable with the stock sizes. I've used sports cups before will see if they have the appropriate size. __________________ Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the rear. Horsepower is how fast you hit the wall. Torque is how far you take the wall with you.

03-02-2013, 11:44 PM	#5
klammer Colonel Drives: 11 spc gry m3 e90, 07 X5 Join Date: Jan 2010 Location: chicago Posts: 2,722 iTrader: (0)	I know someone that runs a 285 square setup at the track so know that end will fit. Not sure about 305's without possible fender pulling, but as said earlier, would take the perfect combo of wheel size, offset, camber and even tire choice as some tires have more square or rounded edges to make that setup work. Would love to see it done though. __________________ mods: akra evo, dinan 3.45 diff, ess akra tune, dinan stg.3, Alcon bbk, HRE P40

03-03-2013, 04:49 AM	#6
lukester Second Lieutenant Drives: BMW M3 Join Date: Feb 2011 Location: Munich, Germany Posts: 205 iTrader: (0)	will do it. gimme some weeks. Plan: 285/30-18 all around Michelin Pilot Cups 10x18 ET25 wheels (which will get a 5-10mm spacer front and 10-15mm rear). here's a teaser of the tires. weight is shown in Kilogramm. "my old" 265/35-18 Michelin Cup tires: "the new" 285/30-18 Michelin Cup tires: Both on one picture. 285/30-18 will be really tight on the front but it should work. __________________ Objects in Mirror are Doing it Sideways If you love it fast&hard-check out my youtube channel http://www.youtube.com/lukecustoms

03-03-2013, 07:49 PM	#8
Richbot Major Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL Posts: 1,486 iTrader: (1)	Plenty of racers running the 285/30-18 in various trims on e92 M3's with success __________________

03-02-2013, 12:24 PM	#2
Tuner1 Second Lieutenant Drives: 2011 E90 M3 Join Date: Sep 2007 Location: Calgary, AB Posts: 248 iTrader: (6)	285/30 and 305/30 are way too wide for the stock ZCP wheels. That being said, on proper wheel sizes (10" or 10.5" F and 11" or 11.5" R) it is pretty much the ultimate tire combo for the E9X M3 chassis. I am thinking about trying it and am surprised that it hasn't been done before. Of course it will require wheels with the perfect offsets and more camber than stock but I know it can be done

03-12-2013, 07:35 PM	#10
motortrend Goldmember Drives: EM Siree Join Date: Aug 2010 Location: Puerto Rico Posts: 258 iTrader: (1)	Will 295/30 r19 on the rear rub with stock ZCP?

03-13-2013, 04:42 AM	#14
CON G New Member Drives: 2010 M3 E90 M-DCT ZCP SSII Join Date: Feb 2013 Location: PERTH WESTERN AUSTRALIA Posts: 18 iTrader: (0) Garage List 2010 BMW E90 M3 [0.00]	Think Im going to just run some R comp 275/30/R19 square, using stock ZCP's and look at getting some camber adjustment plates. Spotted some on the Apex website. That should do for the track for a little while. BPM tune has been ordered so I just have to wait for all the goodies to arrive :-) __________________ Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the rear. Horsepower is how fast you hit the wall. Torque is how far you take the wall with you.

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