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Smart tube slime

Old 11-08-20, 05:11 PM
  #1  
bettrave
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Smart tube slime

Hi,
Anyone use those tubes for road cycling? Any comments?
I had 2 punctures.
My tires are still really good: Continental GP4000
Thank you
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Old 11-08-20, 05:39 PM
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Mulberry20
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Those tires havenít been made for about 5 years maybe. Perhaps you need new tires.
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Old 11-08-20, 06:26 PM
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veganbikes
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No any filed tubes or "thorn proof" tubes or any gimmicky tubes are not worth anything. Get a good quality tube, keep your tires properly inflated and check the tires regularly for wear or issues. If you do get a flat make sure you figure out what caused the flat and if it was something in the tire remove it and replace tire as needed, if it was an issue with the rim or rim strip replace those or smooth out the rim. If you get two holes like a snake bite you are running too low of a pressure.

As Mulberry20 said you may need new tires GP4000 are older tires.
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Old 11-08-20, 07:12 PM
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If your Gp4000's are still in good shape, I wouldn't worry about them. I would imagine there are lots of riders still on 4k's, including me, and I'm not swapping them out because someone considers them old. Now, if your sidewalls are dried out or damaged, and or your wear indicators are almost gone, that's another issue.

As far as adding sealant to your tubes, again, you wouldn't be the first. I'll say this though, I put slime tubes on my new mtn bike as a stopgap measure until I go tubless, and while they work, when I need to put air in them, they seep leaving a mess around the valve stem. Did I mention they're heavy.....Really heavy.

Last edited by Wileyrat; 11-08-20 at 07:17 PM.
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Old 11-08-20, 11:16 PM
  #5  
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No experience with slime tubes.

Just popping in to point out that the gp5k was released right about 2years ago and gp4k tires were still sold for a long time after the 5k was released.
I bought a pair of gp4k tires last November during a black Friday sale.

They are an old version, but they are perfectly good tires still. They dont get worse just because a new model is released.
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Old 11-09-20, 04:32 AM
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No experience in that.
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Old 11-09-20, 05:35 PM
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Originally Posted by mstateglfr View Post
No experience with slime tubes.

Just popping in to point out that the gp5k was released right about 2years ago and gp4k tires were still sold for a long time after the 5k was released.
I bought a pair of gp4k tires last November during a black Friday sale.

They are an old version, but they are perfectly good tires still. They dont get worse just because a new model is released.
I bought mine in august 2019. They have around 2200km (1375 miles).
However, not where was my last puncture, there a small "crack" (sorry I don't know the right word) on the outside of my tyre, where the tyre roll on the road. It does not go through all the way inside.
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Old 11-09-20, 05:37 PM
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Originally Posted by bettrave View Post
I bought mine in august 2019. They have around 2200km (1375 miles).
However, not where was my last puncture, there a small "crack" (sorry I don't know the right word) on the outside of my tyre, where the tyre roll on the road. It does not go through all the way inside.
yeah, I have those on a 4k tire too. I've had em on other 4k tires too. I check every now and again, but they stay the same size.
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Old 11-10-20, 08:51 PM
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I know a guy that runs tubeless sealant in his tubes on non tubeless wheels. Gets tubes with removable cores and adds sealant like you would with tubeless tires. He swears by it and says he has not had a flat in a few years.
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Old 11-10-20, 09:58 PM
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Any side wall damage such as dry rotting/cuts/nicks exc should be examined carefully. If your sidewalls shows any sign of this, consider in the near future to replace.

As far as ďpuncture resistantĒ, I wish those two words would get thrown in the garbage. You get flats. End of story. No amount of ďthickerĒ tubes, sealant inside a tube, or even those ridiculous plastic ribbons people put between their tire and tube is going to help. Itís all marketing to target newer riders for a peace of mind. Even Gatorskins canít help protect everything. If itís going to puncture, itís going to puncture.
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Old 11-11-20, 05:44 AM
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Sealant work in lower pressure tires, like 60psi or below. It blows right out of 100 psi road tires. If I get more than 2 flats in a tire, it goes in the trash and I get new tires. This works for me and I go a year or 2 between road bike flats. The GP4000's didn't hold up on the roads near me. I ran Conti Gator skins for awhile, the tread is durable until they wear thin, but the sidewalls are crap. Panaracer Tourguard and Schwalbe have been durable enough to stick with for about 12 years.
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