Tire Size Recommendations

dgbos · 03-11-2011, 08:55 AM

Need to replace my rears. I ran 245/35/19 fronts and 285/30/19 rears last year (Advan Sports) and liked the look. Was reading this is too much of a delta for understeer. Should I go down to a 275/30 to match up with the fronts better? 9.5 front wheel and 10 rear with Eibach drop. Thanks!

Brosef · 03-11-2011, 10:01 AM

you would want to do 275/35, not 275/30 (which is too short). that would be my recommendation, and you could switch the fronts to 255/35 when the 245's wear out. this would get you to the OEM stagger - 20mm wider tires in the rear (as opposed to the 40mm wider rears that you have now).

kmarei · 03-11-2011, 10:07 AM

i have 255/35 19" and 275/35 19" PS2s
great handling
and slightly higher sidewall so more comfortable than stock

dgbos · 03-11-2011, 10:19 AM

Thanks guys - want to keep the 245/35 fronts so sounds like 275/35 is the best choice versus 285/30 for this year.

SlowLeak · 03-11-2011, 04:30 PM

I have a related question. I'll be replacing all four this spring and I'm thinking I'll try out the new SuperSports. I have stock 19s with stock suspension and 15mm front/12mm rear spacers. Looks like 275/35 is the way to go for the rears. Will I have issues if I go to the 255/35 fronts to keep the 20mm stagger or should I keep it with the stock 245/35 size?

Thanks.

slicer · 03-12-2011, 06:29 AM

Quote:

Originally Posted by SlowLeak

I have a related question. I'll be replacing all four this spring and I'm thinking I'll try out the new SuperSports. I have stock 19s with stock suspension and 15mm front/12mm rear spacers. Looks like 275/35 is the way to go for the rears. Will I have issues if I go to the 255/35 fronts to keep the 20mm stagger or should I keep it with the stock 245/35 size?

Thanks.

255/35's will fit in the front. Most people who get 275/35's for the rear go with 255's in the front. It is possible that you could rub with the 15mm spacers but I would not hesitate to get the larger tires. If they rub with 15mm spacers (I don't think they will) your can try the 12mm's that you already have. Spacers are relatively easy to sell if you need a different size.

dgbos · 03-12-2011, 08:40 AM

Think I am fine to keep 285/30 rear and 245/35 fronts?

calintexas · 03-12-2011, 02:10 PM

Quote:

Originally Posted by dgbos

Think I am fine to keep 285/30 rear and 245/35 fronts?

Yes, your are fine. The increased understeer is likely something you would only notice on a track. Even if you get in a situation where the car understeers a bit, it's not a big deal.

03-11-2011, 08:55 AM	#1
dgbos Second Lieutenant 43 Rep 216 Posts Drives: 2015 M5 BSM CP Join Date: May 2009 Location: Boston iTrader: (0)	Tire Size Recommendations Need to replace my rears. I ran 245/35/19 fronts and 285/30/19 rears last year (Advan Sports) and liked the look. Was reading this is too much of a delta for understeer. Should I go down to a 275/30 to match up with the fronts better? 9.5 front wheel and 10 rear with Eibach drop. Thanks!
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03-11-2011, 10:01 AM	#2
Brosef Brigadier General 876 Rep 3,450 Posts Drives: F90 M5 Join Date: Aug 2009 Location: Chicago iTrader: (4)	you would want to do 275/35, not 275/30 (which is too short). that would be my recommendation, and you could switch the fronts to 255/35 when the 245's wear out. this would get you to the OEM stagger - 20mm wider tires in the rear (as opposed to the 40mm wider rears that you have now).
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03-11-2011, 10:07 AM	#3
kmarei Major General 687 Rep 6,845 Posts Drives: 2018 Audi RS5 coupe Join Date: Jul 2008 Location: Reston, VA iTrader: (34) Garage List 2018 Audi RS5 [0.00]	i have 255/35 19" and 275/35 19" PS2s great handling and slightly higher sidewall so more comfortable than stock
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03-11-2011, 10:19 AM	#4
dgbos Second Lieutenant 43 Rep 216 Posts Drives: 2015 M5 BSM CP Join Date: May 2009 Location: Boston iTrader: (0)	Thanks guys - want to keep the 245/35 fronts so sounds like 275/35 is the best choice versus 285/30 for this year.
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03-11-2011, 04:30 PM	#5
SlowLeak Enlisted Member 1 Rep 34 Posts Drives: M4 CS San Marino Blue Join Date: Oct 2008 Location: Madison, WI iTrader: (0)	I have a related question. I'll be replacing all four this spring and I'm thinking I'll try out the new SuperSports. I have stock 19s with stock suspension and 15mm front/12mm rear spacers. Looks like 275/35 is the way to go for the rears. Will I have issues if I go to the 255/35 fronts to keep the 20mm stagger or should I keep it with the stock 245/35 size? Thanks.
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03-12-2011, 08:40 AM	#7
dgbos Second Lieutenant 43 Rep 216 Posts Drives: 2015 M5 BSM CP Join Date: May 2009 Location: Boston iTrader: (0)	Think I am fine to keep 285/30 rear and 245/35 fronts?
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