Bought new Tires, Switched to non-runflats Kumho XS, but whenever I run in 40 degree weather my car goes nowhere

* I will do a complete review of the Kumho XS tires with pretty pictures shortly

 

If you thinks that's bad you should live in Wisconsin.

 

1st 2nd 3rd all goofy my v6 minivan feels just as quick

 

I here the engine screaming the rev bouncing of the limiter and VOILA! car feels like it going nowehere.

 

Unfortunately,all high performance tires are slippery when the temps drop to *40.....just the nature of the beast.

 

I have Kumho tires also and I see NOTHING like you see. I am very happy with the traction. We do get those temperatures here also.

Are these tires brand new? Very new tires still have an oily residue that they use for releasing from the tire molds, I believe. Takes a while for it to wear off. Not a lot, 20-25 miles?

 

I went from oe tires to XS's too. They were slippery with mold release compound for a couple days, but after that they were an improvement over the runflats.

Despite being better than the runflats, wheelspin is still a problem. I used to think cars with enough power to spin the tires from a roll where super cool... now I hate it. gettnig into the gas and getting nothing but noise sucks.

I've driven five Corvettes with various tires and I'm sorry to say that the car has a traction problem that tires alone won't solve.

 

Get the 'new' off the tires and they should improve. You'll still suffer the effects of 40 degrees but it shouldn't be as bad.

 

Shoulda got R888s....

 

you're fighting 2 battles, cold tires have less traction and the cold temps you car makes more horsepower making it even tougher for the tires to hook.

 

I have the XS's with 570whp and I get traction in most of 1st gear and all of 2nd on the street.............on a warm day (above 70deg and after they are warm enough to raise tire pressure 2psi) These tires are actually marketed to be SCCA racing tires, which is why they need to be warm themselves.

*No street tire will hook up in cold weather.

Just for reference, I took these tires to the track last weekend and launched at 3500 rpms and had ZERO wheel spin through all gears. (outside temp was 78) Show me another non-R street tire that can do that.

 

Impressive! Not to hi-jack, but what'd you run?

 

What was your 60ft time??

 

Not another "why can't I have traction at cold temperatures with my summer-only/pseudo-race/race/slick/drag tires" ...

 

I have XS's and a bone stock LS2 and I don't have traction with WOT in first gear on the street.

 

do you leave every light with your foot on the floor?

 

I don't leave hard, any kind of agressive pull away results in wheelspin, so I rarely do it.

From a roll in first gear, be it 10, 20, 30, or even 40 mph, a stab too deep into the throttle will often result in mostly wheelspin and little forward motion. The situation is somewhat surface dependent, and some streets are better than others. However, the general rule is that getting deep into the gas in first gear spins the tires.

I have driven a stock C5 Z06 and a stock C6 Z06 and both had the same traction problems. Mine is a manual Z51. I suppose a car with a different suspension option may have different traction characteristics, and certainly a car with an auto trans would have different traction characteristics, but for those with a Z51 manual like me, it's hard for me to understand how anyone is getting traction from a launch, or from a roll in first gear.

What I am describing happens in warm weather with warmed up tires with 1000 miles on them. While one could debate how good the XS's are, clearly they are a fairly soft, high grip tire, so I don't see why some other tire would be a night and day difference...

I don't know why experiences vary so much on this issue, but I can relate to the OP because this is something that has taken alot of the fun out of driving the car for me.

 

Wow do you have a LS9 in your C6?...My LS3 must be weak because I never have that problem..

 

A lowsey high 11 seconds...the tune is way off, but should crack a 10 soon when things are fixed.

1.9 I launched at 3500 with a smooth engagement. Figured I would spin and all it did is bogg the traciton was soo good. I wanted to try a launch at 4k and gas it harder but the track closed....Im certain I can cut a 1.7 with these, maybe better.
When the track opens up in January, I will take a Video of a run to show the launch.
(BTW a stock GT500 was spinning 1st and 2nd on the same lane)

As for the tires on the street. I had them when I was stock and had NO problem hooking up in 1st, 2nd on a warm day. I guess I could spin them if I popped the clutch at 4-6k rpm's

Heres the kicker: Anything below 65degress out and they will spin(like every other street tire)
So far, temps above 70 and sunny out and I can hook up most of 1st and all of 2nd, if they are real warm.

Again guys, not a miracle tire, but best traction Ive seen in a non-R street tire.

 

One thing I failed to mention.... the road surface plays just as much a role in traction as any of the other factors.

Smooth black pavement is where I am getting traction. If your on the knobby, course, highway asphalt, you wont hook-up.