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Knobs splitting off tire?

Old 05-13-21, 10:38 AM
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loubikes
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Knobs splitting off tire?

Hello, this is just a defective tire right? The rubber wasn't made correctly or something? Can anyone shed anymore light on this? Is it possible this is something I've done?

​​​​​​​Innova Dirt Controller 2024 MTB Wire Tire - Black / 26" - 2.35" 1

Tires are 5 months old exactly. Not many miles. Maybe 200-300. Occasionally left outside but only when weather is nice. I cross a stream a couple times when I do ride.

Thanks




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Old 05-13-21, 10:58 AM
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From the looks of it (tire brand, size model, etc.) I'd say there is nothing to worry about.
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Old 05-13-21, 11:06 AM
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Ha, sorry about that. Updated.
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Old 05-13-21, 11:09 AM
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Had this problem with some 38mm Kenda gum wall tires. It only happened in the winter when the temp was about 50 F. Here in Central Texas that's cold. On the other side these, the Kenda's, held up well in 105F temps on black tarmac. Go Figure???
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Old 05-13-21, 11:20 AM
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That's better. What kind of tires are they? Cheap?
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Old 05-13-21, 03:54 PM
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Given the sidewall cracks the first image shows I would speculate the tire's rubber has become brittle, or "dry rotted". The stress of flexing is focused on the knob's bases so no wonder a crack shows there too. The side wall cracking can be induced sooner if the tire was ridden w/ too little air too.

UV exposure will hasten this condition too. Andy
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Old 05-13-21, 05:28 PM
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Originally Posted by loubikes View Post
Hello, this is just a defective tire right? The rubber wasn't made correctly or something? Can anyone shed anymore light on this? Is it possible this is something I've done?
Tires are 5 months old exactly. Not many miles. Maybe 200-300. Occasionally left outside but only when weather is nice. I cross a stream a couple times when I do ride.
No, tires shouldn't be cracking on the sidewall or tread like that if only 5 months old. Could be a few reasons, tires have been sitting on the shelves for eons before they were sold, stored near ozone producing electric motors such as refrigerators which age rubber, stored around nasty chemicals or, as mentioned, in the sunlight or could just be a bad batch. Contact Innova about how to determine the mfr. date of your tires.
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Old 05-13-21, 05:30 PM
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We sold some of these because it was literally the only 26" tire you could get for months. Didn't see these problems with any yet, fingers crossed I guess.
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