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Wear Dots on Conti tires

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Wear Dots on Conti tires

Old 10-14-17, 04:14 PM
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Wear Dots on Conti tires

Conti GS4000 GPii tires (and I assume most other contis) have a couple of divots in the tire to show wear. One is deeper than the other. What's the significance of each depth?

Unlike car tires, having no tread is the the way bike tires are from about the 2nd mile to the last, so it's not like wear bars on car tires, which indicate you're down to 4/32", and it's soon time to replace.
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Old 10-14-17, 04:16 PM
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I've never noticed the two dots to have different depths and that is the only clincher I ride. When the dot disappears, you are nearly through the rubber so buy a new tire. Easy-peasey.
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Old 10-14-17, 04:23 PM
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Originally Posted by rpenmanparker
I've never noticed the two dots to have different depths and that is the only clincher I ride. When the dot disappears, you are nearly through the rubber so buy a new tire. Easy-peasey.
Well, yeah, I got that, but mine are different depths. Obviously when the deeper one is gone it's time - wondering about the shallow one though.
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Old 10-14-17, 04:36 PM
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Do you tend to lean to one side while riding?
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Old 10-14-17, 04:43 PM
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The tread thickness varies from thickest in the center, thinning to near zero on the sides. If the dimples are in different places, ie dead center, off to one side, then that may explain the difference.

OTOH - who knows, maybe an early waning, and a final warning.

In any case, bikes aren't cars and tread depth is meaningless. Most experienced riders will ride a tire until it's worn to the under tread (if they're lucky enough not to kill it off other ways first).

This whole tread wear marking nonsense is just an example of what happens when stuff goes mainstream enough for all sorts of people to look and find ways to "fix".
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Old 10-14-17, 05:15 PM
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Originally Posted by FBinNY
The tread thickness varies from thickest in the center, thinning to near zero on the sides. If the dimples are in different places, ie dead center, off to one side, then that may explain the difference.

OTOH - who knows, maybe an early waning, and a final warning.

In any case, bikes aren't cars and tread depth is meaningless. Most experienced riders will ride a tire until it's worn to the under tread (if they're lucky enough not to kill it off other ways first).

This whole tread wear marking nonsense is just an example of what happens when stuff goes mainstream enough for all sorts of people to look and find ways to "fix".
I had a pair of Origin8 Elimin8ers with a colored tread, and a black under-tread. That black layer wore and wore and wore. I don't think I ever quite got through it. I would imagine many good tires were thrown out when patches of black started to show through.

I haven't paid attention to those Conti dots. I had a Gator Hardshell that lost a chunk of tread rubber large enough that I stopped using the tire (already was wearing mighty thin). My GP 4S wore so that the tread had a stringy look. I put a few hundred miles on it after that, but took it off preparing for about 400 to 500 miles in a week including two century-plus rides, and one hill ride.

Anyway, pay attention to the tires, not the divots.
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Old 10-14-17, 05:37 PM
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I just looked at my brand new (200 miles) Conti Ultra Sports and I don't see any divots ??
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Old 10-14-17, 06:39 PM
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I would think different depths would be to help locate where the divots are when the tire is almost worn down.
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Old 10-14-17, 08:01 PM
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As discussed in other threads-

wear whatever you want.
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Old 10-14-17, 08:29 PM
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IIRC, the holes are at different locations to give a better indication of tread wear around the entire cross section of the tire, not just in the center.

My guess is that the holes further to the outside of the tire are not as deep as the holes in the center because the rubber on the outside of the tire is not as thick as in the center.


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Old 10-14-17, 08:35 PM
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I'm another one never lucky enough to wear out the dots. My Conti tires always get cut to death first, but are still better than other tires I've tried.
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Old 10-14-17, 08:44 PM
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Originally Posted by ThermionicScott
Do you tend to lean to one side while riding?
I observed uneven dot depth on the brand-new tires I installed for AG on Thursday.
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Old 10-14-17, 08:52 PM
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The dots IME are symmetrically placed to ether side of the center line of the tire. Newer versions may have different depth dots, but I have never seen it.
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Old 10-14-17, 11:49 PM
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https://photos.app.goo.gl/QoQQ8vVQ0R5ILcck2

These are GP4000IIS. Wear dots on the rear tire are not quite on the centerline of the tire, but without measuring, do seem fairly equidistant from the centerline. I know they have at least 4k miles on them because I did not replace them this year.
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Old 10-14-17, 11:57 PM
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Many roads have a lot of camber. So much that it wears tires unevenly. On almost every ride I can see dust on my tires revealing the contact patch is mostly to the left of center. That's mostly from riding the bike lanes. As soon as I get to areas where I can ride the main lane without problems the contact patch is centered.

So eventually the tires will wear out on the left while the right will still look okay.
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Old 10-15-17, 09:38 AM
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Originally Posted by ThermionicScott
Do you tend to lean to one side while riding?
Originally Posted by canklecat
Many roads have a lot of camber. So much that it wears tires unevenly. On almost every ride I can see dust on my tires revealing the contact patch is mostly to the left of center. That's mostly from riding the bike lanes. As soon as I get to areas where I can ride the main lane without problems the contact patch is centered.

So eventually the tires will wear out on the left while the right will still look okay.
I'll have to switch the rotation on my tires!
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Old 10-15-17, 09:53 AM
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Originally Posted by Carbonfiberboy
I'm another one never lucky enough to wear out the dots. My Conti tires always get cut to death first, but are still better than other tires I've tried.
Add me to the list. I don't recall throwing away a tire with no dots.
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Old 10-15-17, 12:30 PM
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Originally Posted by Bah Humbug
I observed uneven dot depth on the brand-new tires I installed for AG on Thursday.
Interesting.

Originally Posted by drewguy
I'll have to switch the rotation on my tires!
It's something to consider, but I wouldn't fret about it too much. Those dots are a curiosity, something to placate those who need their hands held, but the old-school method of riding your tires until you wear all the way through the rubber or start getting an unacceptable number of flats still works.
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Old 10-15-17, 12:31 PM
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Same idea as the texture on golf balls. Dimpled tires go faster.

Its the future of road cycling.


-Tim-
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Old 10-15-17, 12:36 PM
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Originally Posted by TimothyH
Same idea as the texture on golf balls. Dimpled tires go faster.

Its the future of road cycling.

-Tim-
Those folks at Continental are so clever! These must be super-fast then.

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Originally Posted by chandltp
There's no such thing as too far.. just lack of time
Originally Posted by noglider
People in this forum are not typical.
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Old 10-15-17, 01:19 PM
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Originally Posted by TimothyH
Same idea as the texture on golf balls. Dimpled tires go faster.

Its the future of road cycling.


-Tim-
Zipp Tangente tires have been the future for some while, then.
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