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Slime sealant / spinskins tire liners ---> any good?(7 posts)

Slime sealant / spinskins tire liners ---> any good?Synchronicity
Sep 29, 2003 9:24 PM
I'm Getting a new set of cosmos training wheels & I would like to reduce the possibility of punctures. I know it helps not riding over glasss & avoiding potholes etc where possible. I'm sure I've reduced the number of punctures I would've gotten otherwise by doing this.

But lately, I've had two punctures that have been caused by a short length of steel wire (approx 1mm diameter; 1/4" length) going straight through the tire tread & inner tube - causing a slow leak. I don't think ANY tire/tube combo would prevented this.

I run my tires at 120psi front 140psi rear; will that slime sealant be able to cope with those sorts of pressures?

And those spin-skins kevlar liners seem rather pricey, considering it says they only last as long as the tires themselves.

Any other alternatives to preventing punctures that I might be forgetting?

Spin Skins suckDougSloan
Sep 30, 2003 7:59 AM
I tried these after getting a flurry of flats with my Michelin race tires. They did no good whatsoever, and made it a real pain to replace a tube on the road. I ended up yanking one out and shoving it in my jersey pocket. Number of flats did not change.

I've found that slimed tubes work fairly well in lower pressure tires like for cruisers or mountain bikes. They are heavy, and I've found that they don't prevent flats (hard to really know, though) in high pressure road tires.

I'd recommend, instead, using tougher tires and tubes. I switched from very lightweight tires and Lunarlight tubes, getting at least one flat a week, to Conti Gatorskins and "normal" weight Michelin tubes, and since very rarely flat. The over all weight is likely less than using slime tubes. For racing, I either use Veloflex clinchers or Tufo tubulars with the sealant injected.

I don't think I'd use so much pressure, either. I use 115-120 on both tires. Also, tires that are well worn tend to get a lot more flats, in my experience, which is why I've almost never actually worn one out. They either start getting lots of flats or get cut up well before the cords show.

re: Slime sealant / spinskins tire liners ---> any good?JimP
Sep 30, 2003 9:06 AM
I haven't had much luck with Slime. I have had several of the types of punctures that you have described and I agree that nothing would stop the puncture. I have had better luck with Specialized Airlock sealant. I have also used Tufo sealant with limited success. I ride with 105psi front and 115psi rear and weigh 195 lbs.

Slime is finicky ... sometimes it works ... sometimes ...Humma Hah
Sep 30, 2003 12:56 PM
... it doesn't. It is a big help for MTB's that are used in areas with lots of thorns. But it ONLY works with a properly-sized tube. If your tube is naturally smaller than your tire case, the tube must stretch to fill the tire, and any little hole that forms will instantly become a BIG hole that Slime can't plug.

Slime is a chore to get into a Schrader valve because of the fiber it contains. I have doubts you CAN get it into a Presta valve at all. And I've not tried it at high pressure ... it may not hold.

It does seem to be good at reducing pinch flats, because it lubes the inside of the tube. When the two pieces of tube come together, they don't form tears if they're slippery.

I run thorn-resistant tubes in the cruiser, properly sized for the fat tire cases, with Slime in them. Seems to help, but a couple of episodes with roofing nails and a 5" long piece of road flare support wire taught me they CAN let you down.
Sep 30, 2003 5:47 PM
yeah I probably won't bother with it then.

sounds more trouble than its worth.
re: Slime sealant / spinskins tire liners ---> any good?jrm
Sep 30, 2003 2:41 PM
Ive tried slime, it was messy and didnt offer that much more protection. Ive found a greattirecalled the Panaracer Tserv for messenger. Theyre kinda heavy but wear real well and offer a great amopunt of protection. Also work well in rain.
Try lowering the pressureKerry Irons
Oct 1, 2003 4:39 PM
There's no reason you should be running 120/140 psi if you have the right size tires. Take it down to 100/110 or so. You may well be agravating your flat problem by running such high pressures that you force debris into the tread. If you get pinch flats at the lower pressures, then you need wider tires. You're kidding yourself if you think you're cutting rolling resistance at those pressures (compared to the more sane 100-110 psi).