Extreme Contact Force and Sizing

JustJames · 08-13-2021, 08:50 AM

Anyone have experience on the new Conti Extreme Contact Force tires?

Thinking about running 275/35/18F and 295/30/18R on apex 18X10"/11".

Any potential issues with running a staggered aspect ratio like this?

Looking to find a good HPDE trackday tire that is also legal for my SCCA 200TW limits. I know this tire isn't primarily for autoX but I spend more time on circuits and they will probably (hopefully) have more grip than the Conti ECS which i currently use.

x.shell · 08-14-2021, 01:21 AM

Quote:

Originally Posted by JustJames

Anyone have experience on the new Conti Extreme Contact Force tires?

Thinking about running 275/35/18F and 295/30/18R on apex 18X10"/11".

Any potential issues with running a staggered aspect ratio like this?

Looking to find a good HPDE trackday tire that is also legal for my SCCA 200TW limits. I know this tire isn't primarily for autoX but I spend more time on circuits and they will probably (hopefully) have more grip than the Conti ECS which i currently use.

Rear diameter will be smaller than the front.

JustJames · 08-15-2021, 06:11 PM

Yup - got that. Just was hoping to see if people experienced issues with this type of setup for ABS or something. I usually run traction control off so not worried about that.

JustJames · 08-21-2021, 11:56 PM

Can’t really find too many reviews of the tire, so I guess I’ll just have to give it a go myself!

lvevo · 08-25-2021, 01:45 PM

Those tires were just released so not too many people have bought a set yet. That said I do see people who have the tire, but haven't posted any comments about the tire yet. I saw Tire Rack was testing the tire for review I think this week.

mike082802 · 08-25-2021, 04:11 PM

I'm wondering how the stack up against the rt660.

08-13-2021, 08:50 AM	#1
JustJames -James 49 Rep 40 Posts Drives: 2016 M3 Comp Join Date: Mar 2021 Location: Boston, MA iTrader: (0)	Extreme Contact Force and Sizing Anyone have experience on the new Conti Extreme Contact Force tires? Thinking about running 275/35/18F and 295/30/18R on apex 18X10"/11". Any potential issues with running a staggered aspect ratio like this? Looking to find a good HPDE trackday tire that is also legal for my SCCA 200TW limits. I know this tire isn't primarily for autoX but I spend more time on circuits and they will probably (hopefully) have more grip than the Conti ECS which i currently use.
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08-15-2021, 06:11 PM	#3
JustJames -James 49 Rep 40 Posts Drives: 2016 M3 Comp Join Date: Mar 2021 Location: Boston, MA iTrader: (0)	Yup - got that. Just was hoping to see if people experienced issues with this type of setup for ABS or something. I usually run traction control off so not worried about that.
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08-21-2021, 11:56 PM	#4
JustJames -James 49 Rep 40 Posts Drives: 2016 M3 Comp Join Date: Mar 2021 Location: Boston, MA iTrader: (0)	Can’t really find too many reviews of the tire, so I guess I’ll just have to give it a go myself!
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08-25-2021, 01:45 PM	#5
lvevo Private First Class 76 Rep 151 Posts Drives: Evo 9, Focus RS Join Date: Sep 2018 Location: IE, CA iTrader: (0)	Those tires were just released so not too many people have bought a set yet. That said I do see people who have the tire, but haven't posted any comments about the tire yet. I saw Tire Rack was testing the tire for review I think this week. __________________ Passively looking for a F80 M3 Competition & Executive w/ manual trans in all colors but black. Prefer 2018 and Carbon Cloth seats.
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08-25-2021, 04:11 PM	#6
mike082802 Major 114 Rep 1,004 Posts Drives: 2010 135 Join Date: Feb 2014 Location: ny iTrader: (2)	I'm wondering how the stack up against the rt660.
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