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View Full Version : Conti tire question (from roadfly) pretty interesting . . .


AF
12-20-2002, 06:27 AM
There was a poster over at roadfly that bought some conti's and noticed that the pattern would be different depending what side of the car you mount it on.

Check out his pic below . . . does anyone have an explanation for this ?

Wouldn't this cause the car to have strange handling characteristics ?

Here's the link . . .
http://bimmer.roadfly.org/bmw/forums/e46/forum.php?postid=1521433&page=1


http://www.fototime.com/E8191CC0EF56DD7/standard.jpg

TD
12-20-2002, 06:37 AM
Originally posted by Alan F
There was a poster over at roadfly that bought some conti's and noticed that the pattern would be different depending what side of the car you mount it on.

Check out his pic below . . . does anyone have an explanation for this ?

Wouldn't this cause the car to have strange handling characteristics ?

Here's the link . . .
http://bimmer.roadfly.org/bmw/forums/e46/forum.php?postid=1521433&page=1


http://www.fototime.com/E8191CC0EF56DD7/standard.jpg


It's called asymetrical, Alan. The tires are labelled "Outside" and "Inside".

AF
12-20-2002, 06:53 AM
Originally posted by TD
It's called asymetrical, Alan. The tires are labelled "Outside" and "Inside".

The inside outside part I am familiar with but would this affect the overall driving characteristics of the car.

If you look at those tires, the left side outer tread is a different angle/ direction then the right side outer tread.

I don't know if I am explaining my question clearly but basically I always thought that the opposite side tires should mirror each other.

webguy330i
12-20-2002, 07:21 AM
Alan, the tires are engineered to work together as a unit. They're designed to accomodate more driving situations (i.e. slush, rain, dry pavement, dirt) than a directional tire would, which is usually geared towards one specific task (i.e. snow OR dry pavement OR dirt). The tread pattern change from one side of the tire to the other won't cause the car to handle oddly because they ARE essentially mirrored.

Let's say you get an asymmetrical tire which has large tread blocks on the outside of the tire for good dry grip, and smaller tread blocks on the inside with more sipes for better wet/all-season traction. Can you imagine what it would be like to drive around with the large tread blocks on the OUTSIDE of your front driver's-side tire, and on the INSIDE of your front passenger's-side tire? It'd be all F-ed up to put it lightly. ;)

webguy330i
12-20-2002, 07:24 AM
BTW to add to this, the compound of the tires may actually be different from one side to the next, which means they may not need to switch the direction of the tread blocks. Directional tires DO switch the direction of the tread blocks at the 1/2-way point in the tire tread, but that's why they're directional tires and have to rotate in that one direction. Asymmetrical tires can be rotated into any position on the car, so long as the outside of the tire is still facing outside (which it would have to be unless you dismounted the tire and remounted it elsewhere incorrectly).

Bill97Z
12-20-2002, 08:02 AM
The concern is not how one tire changes tread pattern but how the tires on each side of the car are angled differently.

Look at the outermost tread pattern on each tire (right and left side of car). On one side of the car (left pic) it angles in towards the center of the car and on the other tire (right side) it angles out towards the outside of the car. This is strange since in one direction it probably channels rain one way and the other side of the car channels it the other........

webguy330i
12-20-2002, 08:09 AM
Originally posted by Bill97Z
The concern is not how one tire changes tread pattern but how the tires on each side of the car are angled differently.

Look at the outermost tread pattern on each tire (right and left side of car). On one side of the car (left pic) it angles in towards the center of the car and on the other tire (right side) it angles out towards the outside of the car. This is strange since in one direction it probably channels rain one way and the other side of the car channels it the other........

Ahhhh I see what you mean. Yeah that is odd, but maybe it's not really a concern. If you flip the left tire 180 degrees it is exactly the same as the tire on the right, which makes sense because they don't manufacture a different tire for each side of the car. Maybe this is just a characteristic of asymmetrical tires in general and has been taken into consideration during the tread pattern design/engineering process?

AF
12-20-2002, 08:23 AM
Originally posted by Bill97Z
The concern is not how one tire changes tread pattern but how the tires on each side of the car are angled differently.

Look at the outermost tread pattern on each tire (right and left side of car). On one side of the car (left pic) it angles in towards the center of the car and on the other tire (right side) it angles out towards the outside of the car. This is strange since in one direction it probably channels rain one way and the other side of the car channels it the other........

Hey Bill . . . I see you've joined us :thumbup:

WAM
12-20-2002, 08:35 AM
I imagine the rain channeling is adequate since it is the outermost block.

BFGoodrich make a directional asymetrical tire (gForce KD) which are L & R specific.

They are excellent tires by all accounts but much $$$$.

Bill97Z
12-20-2002, 08:37 AM
Most tires assymetrical tires are labeled outside and inside, but I would think that most have similar tread patterns on the outside of the tire where rain channeling is important. Like you said, some are directional as well and have left and right styles.........

I would still like a technical answer....does continental have a tech service line or email?

Kaz
12-20-2002, 09:42 AM
A lot of asymmetrical tires, especially high-performance ones, also have some hint of directionality to them, but they don't seem to be an issue, at least for the tiremakers. I know the PZero Rosso Asimetricos on my car (which are OEM on $100k+ supercars) have a little directionality to them, and doesn't seem to bother me or Porsche.

Asymmetric all-seasons do tend to be symmetrical across the middle, though.

Bill97Z
12-20-2002, 09:53 AM
I emailed continental, and still awaiting a response.

Tire rack is aware of this and said it's normal. They said some manufactures have asymmetrical tires that are not directional. It sounds to me like they just didn't bother making a left and a right. It still doesnt sound right, but I guess it works, and I would of never noticed if the car wasn't off the car. I should of just bought some bridgestone potenza s-03 pole positions......heard great things about them!

Kaz
12-20-2002, 10:03 AM
The two asymmetrical AND directional tires I can think of offhand are the OEM Yokohamas on the original NSX (Y022R?) and the Goodyear Eagle GS-C on later C5 Vettes. Since both those cars also run staggered, there would be a specific tire for EACH corner.

The HACK
12-20-2002, 10:10 AM
The new ContiSportsContact -IIs have significantly redesigned, completely ASSYMETRICAL patterns.

Haven't had a chance to test it out in rain (my wife's car).

Just my 2 cents. I wonder why they're still getting CSC-I's...I thought Conti's phasing those out?

Bill97Z
12-20-2002, 10:26 AM
<IMG SRC=http://www.tirerack.com/tires/images/conti/co_sport_contact_2.jpg>

The contisport II is a true summer tire. It almost looks scary as its just smooth strips of rubber with no tread for rain or anything. I just read that contisports are gonna be phased out in 2003, so get them while u can at tire rack for 113 bucks each! bargain!

webguy330i
12-20-2002, 10:34 AM
Originally posted by Bill97Z
I just read that contisports are gonna be phased out in 2003, so get them while u can at tire rack for 113 bucks each! bargain!

If you're into that sorta thing! :eek: :lmao:

The HACK
12-20-2002, 10:38 AM
Originally posted by Bill97Z
<IMG SRC=http://www.tirerack.com/tires/images/conti/co_sport_contact_2.jpg>

The contisport II is a true summer tire. It almost looks scary as its just smooth strips of rubber with no tread for rain or anything. I just read that contisports are gonna be phased out in 2003, so get them while u can at tire rack for 113 bucks each! bargain!

They're $110 at 225/45/17. :thumbup:

The grooves are incredibly deep and it's suppose to cut through and channel out water very effectively. My wife hasn't complained about the CSC-IIs in the rain at all, but then again she's very cautious in the rain. I'd have to take it out for a quick "spin" next time it rains HARD on a weekend in So. Cal.

WAM
12-20-2002, 11:27 AM
Dan,

How are the CSC II's on the highway and what do you think of the overall grip levels i.e. steering, braking, etc.

From the tech description on the website, they seem to enhance braking traction, which is probably where I would appreciate optimal traction anyway.

Thanks

WAM
12-20-2002, 11:28 AM
Btw, who is selling CSC II's at $110 for 225/45x17 ?

AF
12-20-2002, 02:42 PM
Bill . .. what kind of tires did you have and what made you pick the conti's

Bill97Z
12-20-2002, 03:32 PM
I have conti's now. I have 26K miles and the rears were about shot and the fronts still have a bit to go. I had an unrepairable nail in the tire so picked up a set for the rear. I Couldn't pass them up for the price, plus they match the fronts. Wet and dry traction is great, road noise is low, and 26K miles is a decent tread wear. I just wish they handled snow better for the little bit we get here in NJ.

If I were to upgrade tires I would go for those S-03's for sure.

sp330i
12-24-2002, 06:33 PM
Originally posted by Bill97Z
I have conti's now. I have 26K miles and the rears were about shot and the fronts still have a bit to go. I had an unrepairable nail in the tire so picked up a set for the rear. I Couldn't pass them up for the price, plus they match the fronts. Wet and dry traction is great, road noise is low, and 26K miles is a decent tread wear. I just wish they handled snow better for the little bit we get here in NJ.

If I were to upgrade tires I would go for those S-03's for sure.

If you are talking about the ContiSports and not the ContiSport IIs, I couldn't diagree more. The wet traction was horrible ( that is in heavy rain conditions with standing water) and they are loud. Ordinary wet road handing is fine, but in FL, I need a tire that can shed puddles of water. My new Sumitomo HTR Z IIs are much better than the Contis in this regard