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Do you slime your tubes?

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Do you slime your tubes?

Old 04-26-15, 07:41 AM
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Do you slime your tubes?

Does anyone slime their tubes? Upside/downside?

I know that replacing tubes is the way to go, but I'm hoping to do some 50+ mile rides and sitting by the side of the road changing a tube is not such a nice idea. I carry a small pump so Hopefully the slime and the pump can get me home.


I just found a great video on sliming presto valve tubes.

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Old 04-26-15, 08:03 AM
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No. Learn how to change your flat, it only takes a few minutes, it's no big deal.
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Old 04-26-15, 08:26 AM
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Originally Posted by valygrl
No. Learn how to change your flat, it only takes a few minutes, it's no big deal.
I'd say that depends on how many flats you get. During goathead season when it's not uncommon to get three or four flats a week without protection (I've seen people get five flats on one ride), dealing with that many flats may not be the end of the world, but it is kind of a big deal.
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Old 04-26-15, 08:36 AM
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I've used regular car slime in a tubular to seal a slow leak and it worked perfectly until the tire wore out.
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Old 04-26-15, 08:37 AM
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Yes. I personally have had pretty good luck with slime. I did slime a presta once, but I'm not a fan of removing the jam nut on the valve to do it. It was easier than I expected but could go horribly wrong.

*NOTE* I am not a fan of prestas. I usually drill my wheels for schraders if it can be done safely.

Also, I have a compressor, so once I've slimed the tube, I flush the stem with air before I reinstall the valve core.
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Old 04-26-15, 08:48 AM
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No, when I first started riding and didn't know jack I bought slime tubes. On a ride a few days later I went over some sharp PVC pipe fragments, sliced open my tire and green goop shot all over me, my bike and some people behind me (let the grade school jokes begin).

That's not to say slime is totally useless for small punctures - if you're on say a MTB or something, but IMO the stuff is irrelevant and heavy for road bikes. If your area is really that bad with glass and goatheads, consider flat resistant tires, tubes, and Mr. Tuffy (and a million other brand names) plastic tire liners.
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Old 04-26-15, 09:30 AM
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Not advisable if it is a 23, 25 or 28 mm 700s tire using presta valves --it will throw out of balance your wheel which is scary at 20 mph or more!
Get good tires and tubes!
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Old 04-26-15, 09:56 AM
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No. Slime was invented by satan to torture mechanics.
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Old 04-26-15, 10:10 AM
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Also, as stated above, probably not the best stuff for road bike size tires. I have not done mine. But my 38 trail tubes and 37 touring tubes and 26x1.75 mtb with kenda kwick tires, I have.

I would not even try to slime a fatbike tube.
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Old 04-26-15, 10:43 AM
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Originally Posted by CafeVelo
No. Slime was invented by satan to torture mechanics.
TRUTH!

In my experience slime works ok in low pressure tires.....but it is still evil. In high pressure road bike tires it is completely worthless in preventing flats and actually adds a huge pain in the ass of cleaning all the slime out of your tire and rim. Don't use slime, just buy good tires.
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Old 04-26-15, 11:50 AM
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Originally Posted by VNA
Not advisable if it is a 23, 25 or 28 mm 700s tire using presta valves --it will throw out of balance your wheel which is scary at 20 mph or more!
You need to review your basic fluid mechanics. As long as it remains liquid, it must be evenly distributed in a spinning tube.
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Old 04-26-15, 11:51 AM
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in short. no.
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Old 04-26-15, 11:52 AM
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Why would you slime tubes when you can go tubeless? Buy a tubeless setup instead.
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Old 04-26-15, 11:55 AM
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Originally Posted by flatblackcapo
In high pressure road bike tires it is completely worthless in preventing flats ...
You're entitled to your opinions, but this statement is contradicted by facts. I've seen and experienced many cases where a thorn or other piece of debris was removed from a high pressure tire, and it sealed right up. I've also seen many cases where a tire sealed after losing 30-40 psi and could be pumped up and ridden as if nothing happened. Finally there have been cases where a tire was completely flat, was pumped up, went flat again, and after three or four tries held air and was good as new after that. So use them, don't use them, like them or not, but don't say sealant doesn't work for high pressure road tires.
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Old 04-26-15, 08:34 PM
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I won't even let that green snot in my shop.
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Old 04-26-15, 08:38 PM
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No.
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Old 04-26-15, 10:12 PM
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Nope, too heavy.
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Old 04-27-15, 06:15 AM
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Yep. I live in goathead country. Slime saves me from lots of flats.
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Old 04-27-15, 06:37 AM
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Repairing a flat tire is no big deal, but doing it while cover in green slime, no thank you.
The stuff is a sealant that solidifies in air, once the genie is out of the bottle, it is pure evil to work around, second only to fix-a-flat.
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Old 04-27-15, 06:56 AM
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I bought some 700c slime tubes when they came out. I could feel the extra rolling weight, the slime would clog up the valve when you try to air the tire up and it balls up at the bottom of the tire when the bike is sitting, so that you get a nice bump feeling every time the wheels turn the first mile or two of a ride. They went in the trash shortly thereafter.
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Old 04-27-15, 07:13 AM
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Originally Posted by flatblackcapo
...Slime works ok in low pressure tires...l. In high pressure road bike tires it is completely worthless in preventing flats and actually adds a huge pain in the ass of cleaning all the slime out of your tire and rim. Don't use slime, just buy good tires.
Bike shops should frame this and hang it on the wall.
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Old 04-27-15, 07:33 AM
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Originally Posted by wallrat
Why would you slime tubes when you can go tubeless? Buy a tubeless setup instead.
+1. Slime is a joke.
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Old 04-27-15, 02:03 PM
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I worked in a bike shop when I was 16. I have forgotten a lot of what I learned there, but I have vivid memories of the owner being furious every time someone brought in a bike that had been slimed. I think he made me take an oath that I would never use that stuff
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Old 04-27-15, 02:31 PM
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Originally Posted by Inpd
I know that replacing tubes is the way to go, but I'm hoping to do some 50+ mile rides and sitting by the side of the road changing a tube is not such a nice idea. I carry a small pump so Hopefully the slime and the pump can get me home.
There are reasons why very few experienced riders slime tubes. I won't touch the stuff myself. Regardless of whether you use it or not, you should never actually count on it.

Tire slime can be useful against certain types of pinprick type flats. That is why the bulk of the people in this thread that have anything positive to say about have goathead experience. Your tire gets stuck, you get a small hole, the hole seals up.

But that's not the kind of flat most road cyclists get. More often, it's shards of glass, tiny chips of rock, or wires from steel belted radials. All these things stay embedded in your tire where they will continue to do damage and let out the air until properly repaired. In addition, there are larger cuts that slime is absolutely useless against.

So no matter what, you need to be able to do a proper repair. Given its weight, relative ineffectiveness, that it settles when you're not moving, and the fact that it can mess up pumps, its appeal has always been overwhelmingly among newer riders who are worried about flats.

BTW, another rotten idea aimed at this same group of riders is solid core tires.
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