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Threads showing near bead

Old 05-14-15, 01:14 AM
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Deontologist
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Threads showing near bead

So I barely put 200 miles on my new tires and the cord is peeking out from under the rubber near the bead (this is only the rear tire).

I'm talking about seeing cord exposed on the part of the tire that is just above the rim's braking track. So the extreme edge of the tire sidewall.

So - how can tires be worn out after only 200 miles? I've only been riding on asphalt - well-maintained asphalt I should add - 99% of the time. There are patches of gravel I plow through but nothing too long and rough. Could it just be that the rear tire is subject to more wear than the front tire (which isn't showing cord?) Also what's more surprising is that the tread is perfectly fine. No cord showing. Just the part of the sidewalls above the bead.

I can only imagine the sidewall being nicked by a few cracks in the road on which I regularly ride. There are these cracks parallel to the direction of travel, and I think at least once I almost got caught in one.

In any case - any recommendations for durable training tires that also have good grip in wet and dry? I have a Rubino Pro Slick but they don't seem to do the wet very well. I haven't slid out or anything in the wet but people keep saying they aren't designed for wet conditions and just don't hold that well in the wet.

Last edited by Deontologist; 05-14-15 at 01:35 AM.
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Old 05-14-15, 01:35 AM
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Sidewall thickness uniformity isn't a prioritized feature in bicycle tire manufacturing. Unless the cord is showing signs of fraying, I'd happily ride it.
Oh, and check that rim brake pads - if any - aren't making contact with the sidewall. And that inflation pressure is OK. And that the tire is of a reasonable width compared to the rim.
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Old 05-14-15, 05:53 AM
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That is not particularly unusual to see "threads" near the bead or just above it. This is a pretty protected area and not a cause for concern.
Agree with the brake pad check however.
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Old 05-14-15, 07:57 AM
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post a picture to make sure we are understanding what it is you are seeing.
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Old 05-14-15, 12:52 PM
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Originally Posted by obed7 View Post
post a picture to make sure we are understanding what it is you are seeing.
Attached Images
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Old 05-14-15, 12:59 PM
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In my amateur opinion, either something is rubbing that tire or you need to pump it up to higher pressure when you ride... Have you had any pinch flats?
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Old 05-14-15, 01:16 PM
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Post a picture of the other sidewall also.
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Old 05-14-15, 01:23 PM
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Damn, something is rubbing the crap out of that....and what put all the dents/chips in the rim just above the brake track?
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Old 05-14-15, 01:27 PM
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Ride off the edge of a curb, or the edge of a road?
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Old 05-14-15, 02:11 PM
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Originally Posted by Little Darwin View Post
In my amateur opinion, either something is rubbing that tire or you need to pump it up to higher pressure when you ride... Have you had any pinch flats?
No pinch flats after 200 miles. Shop pumped them up to rock hard and scarily fast (120 PSI).

Originally Posted by Wanderer View Post
Ride off the edge of a curb, or the edge of a road?

I don't ride near curbs or roads. I put the majority (95+%) of my miles on a smooth, maintained length of flat asphalt.

Originally Posted by obed7 View Post
Damn, something is rubbing the crap out of that....and what put all the dents/chips in the rim just above the brake track?

Good question. I don't know. I posted earlier. No one knows. The chips in the brake track have not been staying the way they are ... I've gotten more since the last time I posted. The pads aren't holding any small rocks or anything; I've checked. Maybe I should get a go pro and point it at the brake track.

Last edited by Deontologist; 05-14-15 at 02:18 PM.
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Old 05-14-15, 02:33 PM
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Any chance you're absentmindedly resting your heel on the chainstay by the tire while coasting?
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Old 05-14-15, 02:33 PM
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can you have someone hold the brakes engaged while you take pics of both sides?
notice the lettering on the word kenda is being rubbed off in a line too.
not just the bottom of the letter, but a bit above that a second rub line... some weird stuff happening here.
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Old 05-14-15, 02:44 PM
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My advice is to get that thing to a dealer, and ask what is going on........ something is wrong!
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Old 05-14-15, 02:46 PM
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Originally Posted by Deontologist View Post
Look as the 200 miles was very hard on the tire.

Something has been rubbing it or you rode it with Low Air Pressure?
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Old 05-14-15, 02:53 PM
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Road bike tires need to be pumped up before each ride. 120 psi is probably a little more than you need but won't hurt the tire.

Threads showing on sidewalls are very common and nothing to worry about. This happens with some brands more than others and is not normally a sign of degree of quality.

Rear tires wear much faster than front tires because the rear carries about 60%, maybe more, of the total weight. But 200 miles is nothing for a bike tire. I tend to get about 3000 miles out of a rear tire (700 x 23 c) and at least twice that amount out of a front.
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Old 05-14-15, 03:14 PM
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Originally Posted by ThermionicScott View Post
Any chance you're absentmindedly resting your heel on the chainstay by the tire while coasting?
I'm clipped in, so no chance of that!
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