Hello I have 4 new tires that all have extra rubber protruding along the seam between the sidewall and tread almost all the way around the tire. Could this cause tread separation as the tires get older?
A picture would help. If the material is paper thin, then nothing to worry about.
thank you mine are along the seam on the edge below the tread and I have some like what is in that picture also.
Those would also be mold parting lines. Nothing to worry about.
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What did the place you bought the tires from have to say about this ?
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Poor quality control at the manufacture.
No.
As mentioned, it’s just flashing. You can trim it off yourself with a hook knife if it bothers you enough. I’m guessing they were on the more inexpensive side of the selections available? Care to share the manufacturer and model of tire you purchased?
I am still waiting on a picture to see just how bad this parting line flashing is… lol
I have seen some pretty bad ones before, but I would just pull it off, customer never saw it…
From my experience I have never seen a tire with this issue all the way around a tire maybe you have but I havn’t so I am sorry you think its funny!
I’ll rely on the manufactures response.
Old molds are a common cause of flashing in injection molding. Flashing occurs when excess plastic material flows outside the intended cavity, creating unwanted thin layers or protrusions on the molded part
Reasons Old Molds Cause Flashing
- Mold wear: Over time, molds experience wear due to repeated use, causing them to no longer fit tightly together
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. This wear can create gaps or misalignments at the parting line, allowing molten plastic to seep through. - Parting line damage: Continuous use can lead to damage at the parting line, which cannot be easily corrected through processing adjustments
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. This damage compromises the mold’s ability to seal properly. - Deformation: The high pressures exerted during the molding process can gradually deform mold surfaces, especially in older tooling
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. This deformation can create areas where flash can occur. - Loss of precision: As molds age, they may lose the precise tolerances required for proper sealing, leading to areas where flash can form
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.
Solutions for Flashing in Old Molds
- Mold maintenance: Regular inspection and maintenance of molds can help identify and address wear issues before they lead to significant flashing problems
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. - Mold repair or replacement: In cases of severe wear or damage, repairing or replacing the mold may be necessary to restore proper functionality and prevent flashing
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. - Adjusting process parameters: While not always effective for worn molds, adjusting factors such as clamping force, injection pressure, and temperature can sometimes help mitigate flashing issues
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. - Cryogenic deflashing: For parts that have already been produced with flash, cryogenic deflashing can be used as a post-processing technique to remove excess material
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By addressing the issue of old molds causing flashing, manufacturers can improve part quality, reduce waste, and maintain efficient production processes.
I didn’t come here to bad mouth the manufacture or the company I bought them from.
The LOL was in responce that you are on a forum asking for help and have been asked to show a picture(s) and yet you seem to be freaking out about it but have YET posted a picture of it…
You have already had a Tire Engineer, other engineers in the field, tell you what it was as well as multiple 25+ year mechanics, master techs, and I retired from the biggest automotive tire manufacture in the world after 17 years, with 35+ years experience in the field with an associate degree in automotive technology and have personally put my hands on thousands upon thousands of tires…
So it is not our fault you do not like the answers given you… AGAIN, you have yet to post any pictures…
IF you would show us a picture(s) then we could say for sure that yes we see this almost everyday, OR WOW!!! that is bad, don’t drive on them, have it towed… but we can’t, because you refuse to post a picture…
So sorry you were offended by 3 little letters…
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Capri Racer who is an actual Tire engineer and has his own web site has said nothing to worry about here.
People have asked for a photo of the tire and what tires you bought. You have not said what the tire dealer said or if you looked at other tires like you bought .
If this really bothers you then see if the dealer will replace these with another brand that looks acceptable to you.
Posting what tires you have is not slamming the tire company it just gives you achance that someone might have the same tires and have not had a problem.
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Not to mention IF there happens to be a real problem with the tires and it could be/is a safety issue, then it may turn into a recall which could help others incase they have the same tires and for whatever reason were not notified about them… I have delt with a few recalls and you would be surprised at the number of people that have no idea they have recall tire(s) on their vehicle, I have had customers come in for a tire rotation or whatever and just happen to spot the faulty tire(s) and replace them and the customer had no idea until I informed them…
Even Michelin has had recalls…
My aunt had a Chevy Malibu with OEM Firestone 500s, which were recalled because of tread separation/blowouts. I informed her of the recall, and she had them replaced (gratis) with Firestone 721s.
I had the sad duty of informing her when the 721s were later recalled.
When Firestone had the big Explorer tire recall, at least in Nashville anyway, they bought EVERY P235/75R15 tire regardless of manufacture around from all the local warehouses and even was having them shipped in and had them in shipping containers on or close to all the stores in order to take care of the customer… Nashville district made a name for itself as the District manager at the time (retired a few years ago) went above and beyond taking care of the customers and was the only district in the US (IIRC) that made a profit during that recall…
Tires are important but reminds me that in college I would buy Firestone recaps, four for $100, installed. Never had a problem. So a little extra rubber from the mold doesn’t bother me.
One of my old college friends from the '60s (who knew zero regarding anything automotive) used to complain about the price of tires, and would always say, “It’s just a hunk of rubber”. Instead of trying to explain a bit about tire design and construction to him, I simply asked… “If I give you $50, can you manufacture a tire for your car?”.