Bicycle Mechanics - Road Tire tear on side wall
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06-17-12, 03:55 PM
Just need some advice on how to properly fix a tear on side of my road bike tire.
Got a flat on it today and i think it was a nail, Then after fixing flat, i got a second one, this was due to a tear in whole part of tire, so the tube came out and popped!!
So the tear opens right up to inside.
What is best way to fix this on the tire?
Duct tape? or suggestions?
The tired is only 5 weeks old. as well. continental.
06-17-12, 04:19 PM
There's no fixing that. Sorry. :(
06-17-12, 04:44 PM
That kind of damage is only repaired as a stop-gap measure because one is on the road and has to ride home. In that case duct tape, wrapped both inside and outside the tire, should hold. A folded dollar bill can serve as a good temporary reinforcement if you have limited tape.
06-17-12, 04:48 PM
You need a piece of 1/32" gasket material used in piping that is reinforced to take the pressure. I super-glue them in and cover them with duct tape. I tape them because the glue makes the edges of the gasket stiff and it will fret through the tube.
I have only used a tire repaired this way on the rear, but I never had one fail.
I have a Panaracer Parcella with a cut in the side wall and it has over 3500 miles on the patch.
Since the casing holds the pressure and yours is damaged, your tyre is shot. People worry about the rubber as if that's important, but it's not (at least until it's gone) - the integrity of the fabric plies is what matters.
You might be able to repair the tear in the manner davidad suggests, but I'd be mighty surprised if you didn't still have a noticeable bulge that you'd feel every revolution...
06-17-12, 06:54 PM
'Tire boots' are sold at bike shops, but they are supposed to be a temporary emergency fix. SOme people have used them for medium-term regular use, but that is not what they are for. YMMV.
The tire is toast. If you're stranded the boot techniques others mentioned might get you home. OTOH if you're home now, booting the tire this way can get you stranded.
But I'm surprised nobody mentioned the importance of finding the cause of the cut wall. Not counting a random road object cutting the wall as you ride over it, the number one cause of tire wall damage is abrasion from a slightly high brake shoe. This is especially true if it's a long circular tear. Take a careful look at your brake shoes, and anything else that might be rubbing the tire, so you're not back cin the same place 5 weeks from now.
BTW- a sure tipoff that the brake shoe is too high is a small lip on the top edge of the shoe. This overhangs the rim and cuts tires. You can see and feel it when the wheel is off.
I guess everyone assumed it's a random cut, since it should be glaringly obvious if it's the brake pad, and that wasn't mentioned.
Still, I guess the difference between a random cut and concentric, abraded damage mightn't be glaringly obvious to everyone, so it's a good catch just in case.
I don't know either way, but when a tire suffers a fatal injury I like to know the cause. A common thread here is the one about multiple repeat tire problems, and it's usually because someone fixed a flat, but didn't resolve the cause.
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