255/40R18 for front on OEM M219s

Z K · 07-05-2017, 12:16 PM

Has anyone run 255/40 on the OEM 18" wheels in front? I want to get more front end grip as I've noticed on track and autocross that the front tires give up before the rear in most situations.

The 255/40 is slightly taller than stock. According to the tire comparison sites about 0.25 inch bigger in diameter. Pricing is similar to the 245/40... has anyone run this config on a lowered car with no rubbing under cornering on track?

G-Lo408 · 07-20-2017, 11:48 PM

Running this size and no issues on Swift lowering springs. I do have around 2degreees of negative camber. On stock suspension no problems at all. Tires is RE-71R

Rassilon · 07-21-2017, 03:07 AM

depends on your tire, I run ad-08r in this size and they barely rub/not rub under full lock.

Dan Bilzerian · 10-17-2017, 02:00 PM

Quote:

Originally Posted by Z K

Has anyone run 255/40 on the OEM 18" wheels in front? I want to get more front end grip as I've noticed on track and autocross that the front tires give up before the rear in most situations.

The 255/40 is slightly taller than stock. According to the tire comparison sites about 0.25 inch bigger in diameter. Pricing is similar to the 245/40... has anyone run this config on a lowered car with no rubbing under cornering on track?

How's your tire wear? usually due to camber you're inner edges will run too hot and cause the front to give out.

rymerc · 10-17-2017, 02:13 PM

If you've already noticed the lack of front-end grip on 245s, you're not going to be happy with the balance of 255s either. Either find a set of rear 18x9.5 wheels to run up front, get an aftermarket set of wheels, or prepare for disappointment.

Even on 275 square on a 9.5" or 10" front wheel you're still going to want more front end grip for autox on a stock suspension. Trying to make due with the 18x8.5" up front is just wasting time and money.

07-05-2017, 12:16 PM	#1
Z K Major General 1889 Rep 5,506 Posts Drives: E90 M3, G20 M340i Join Date: Jul 2011 Location: San Francisco iTrader: (3)	255/40R18 for front on OEM M219s Has anyone run 255/40 on the OEM 18" wheels in front? I want to get more front end grip as I've noticed on track and autocross that the front tires give up before the rear in most situations. The 255/40 is slightly taller than stock. According to the tire comparison sites about 0.25 inch bigger in diameter. Pricing is similar to the 245/40... has anyone run this config on a lowered car with no rubbing under cornering on track? __________________ Auto Detailing Enthusiast!
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07-20-2017, 11:48 PM	#2
G-Lo408 El Eme Tres! 25 Rep 287 Posts Drives: 08 E92 M3 Join Date: Jul 2011 Location: San Jose, CA iTrader: (1)	Running this size and no issues on Swift lowering springs. I do have around 2degreees of negative camber. On stock suspension no problems at all. Tires is RE-71R __________________ Zero Ocho BMW Eme Tres
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07-21-2017, 03:07 AM	#3
Rassilon First Lieutenant 85 Rep 330 Posts Drives: 2011 e92 m3 Join Date: Apr 2015 Location: Seattle, WA iTrader: (0)	depends on your tire, I run ad-08r in this size and they barely rub/not rub under full lock.
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10-17-2017, 02:13 PM	#5
rymerc winner of many hpde trophies 47 Rep 120 Posts Drives: 08 e90 Join Date: Aug 2016 Location: central ohio iTrader: (1)	If you've already noticed the lack of front-end grip on 245s, you're not going to be happy with the balance of 255s either. Either find a set of rear 18x9.5 wheels to run up front, get an aftermarket set of wheels, or prepare for disappointment. Even on 275 square on a 9.5" or 10" front wheel you're still going to want more front end grip for autox on a stock suspension. Trying to make due with the 18x8.5" up front is just wasting time and money.
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