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Old 04-29-06, 05:52 PM   #1
Nachoman
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Time for a new tyre? (photo)

Hi, can I get your opinion on this tire?
Do I need a new one?
The darn thing only has a few hundred miles on it.
What do you think?

http://members.cox.net/oman9978/IMG_0057.jpg
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Old 04-29-06, 06:15 PM   #2
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Hard to tell, did it went all the way to the tube?
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Old 04-29-06, 06:27 PM   #3
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Not even close. I don't see any cord yet.
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Old 04-29-06, 07:10 PM   #4
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When you pump the tire up to pressure does that area feel the same as the rest of the tire?

If you can feel a bump, that means one or more cords are cut and it's time for a replacement. If it's still smooth and the inner tube doesn't stick out, I might continue to ride it.

Since you've found the need to ask, however, that means that you're worried about it. Life is too short to have your serenity disturbed by something that you can replace for a few bucks. Get a new tire and eliminate the worry once and for all.
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Old 04-29-06, 07:25 PM   #5
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It's smooth and the intertube does NOT stick out. But with the air out of the tire, it seemed like I could bend it and maybe cause it to crack all the way through. (So I stoped messing around with it.)
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Old 04-29-06, 07:51 PM   #6
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I'm going to go out on a limb here and suggest you do, do that. That cut doesn't look too hot as it almost cuts across the entire tire.

You really don't want a blowout doing 70kph down a hill, rear tire or not. (Is that a tandem?)
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Old 04-29-06, 08:39 PM   #7
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The strength of the tire is in the cords, not the outer tread layer. While this is a nasty cut, the tire might still be useable. I would pump it up to normal pressure and shoot some silicone adhesive or caulk in the slice. Let the silicone cure overnight then take the bike out for a short ride. Check the silicone to see if it stays in place.

With a cut that large, you risk getting flats from road crud getting pressed up into the slice. The silicone should help prevent that.
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Old 04-29-06, 08:45 PM   #8
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Quote:
Originally Posted by supcom
The strength of the tire is in the cords, not the outer tread layer. While this is a nasty cut, the tire might still be useable. I would pump it up to normal pressure and shoot some silicone adhesive or caulk in the slice. Let the silicone cure overnight then take the bike out for a short ride. Check the silicone to see if it stays in place.

With a cut that large, you risk getting flats from road crud getting pressed up into the slice. The silicone should help prevent that.
+1 My same thought when I read the OPosting. The cut should be abraded/sanded like we did for the old style tire patches.
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Old 04-29-06, 09:12 PM   #9
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Yes you're right, it is a tandem. The tyre is a size 28, with very little tread. I think it's a continental Ultra 3000 (semi slick). I'm not sure what you mean by shooting caulk into the cut because the cut is literally razor thin. The nose on my caulk gun is about ten times as wide. Do you think super glue might do the trick?
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Old 04-29-06, 09:30 PM   #10
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You could try super glue but I haven't had good luck with it. You can buy a small tube of silicone adhesive (or caulk) and cut the tip near the end. Press it up against the cut and squeeze the tube to force it in.

If you use super glue, the pump up the tire, apply the glue, then deflate until the glue cures.
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Old 04-29-06, 09:37 PM   #11
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Neither caulk or silicone or super glue is going to do any good. You're not going to be able to get it to stick very well, and it's not going to handle the flex.

Looks to me like a manufacturing defect. Even if it isn't to the cords, it's going to stress the cords more, and I wouldn't expect it to last long, especially on a tandem.
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Old 04-30-06, 06:26 AM   #12
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Silicone caulk is very flexible, it would have no problem handling the flex. You can also use plain ol' rubber cement. The goal is to fill the slice not to strengthen the tire significantly... just to keep crap from getting caught in it.
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Old 04-30-06, 06:31 AM   #13
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The only thing I see is that when you ride and hit an object on that weak area you could penetrate your tire totally and into your tube.

Tires are not cheap but they are cheaper than your life is worth. I would replace. Just my 2 cents.
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Old 04-30-06, 06:48 AM   #14
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If you are going to worry about it a bunch, just spend the money and get a new tire. It is a fairly cheap piece of mind if it lets you enjoy you bike more. I had some nice tires shipped from Probikekit.com for $16 each with free shipping.
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Old 04-30-06, 04:21 PM   #15
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I agree with the comments about the cost of a new tire versus a trip to the ER, but what about reinforcing the tire with a boot? Instead of trying to seal the cut on the outside, reinforce the tire from the inside. Would that work? The boot material might also help prevent any increased risk of flats by adding a layer for any objects to penetrate.
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Old 04-30-06, 06:19 PM   #16
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Im not a road guy, but i cant see that being much of a problem, or sillacon or CA helping.

Just use it normal, if it gets worse, replace it.
- Or else go down the route of trying to get a replacment on it, only tbh, its bearly worth it.


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Old 04-30-06, 06:27 PM   #17
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I don't know guys it's $15 bucks for a new tire and you can keep the one you have now as a spare.
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Old 04-30-06, 07:07 PM   #18
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Its one thing to debate replacing the tire on a regular bike, but on a tandem with another soul aboard, its silly to even ask. If in doubt, replace it.
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Old 04-30-06, 07:29 PM   #19
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Quote:
Originally Posted by ChainRing
Its one thing to debate replacing the tire on a regular bike, but on a tandem with another soul aboard, its silly to even ask. If in doubt, replace it.
Thats what I was thinking; if it was just me, I'd probably ride on it for a bit, buuuutt, a tandem, I'd be more inclined to get a new tire and keep this as a spare. My worthless 2 cents...
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Old 05-01-06, 11:13 AM   #20
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I would talk to the significant other and use it as an excuse to buy some new tires and since you're already going to the bike shop, you might as well buy some other new gear.
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