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uuuhhgg... another flat

Old 10-07-15, 05:21 PM
  #1  
ceelint
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uuuhhgg... another flat

Went for a short 6 mile ride last night... noticed today my tire was flat again. Pulled the tube out and it's got a hole is the same exact spot as the last time it happened (inner side of tube about 5.5 inches from the valve stem. Checked the inside of the rim and there is nothing that would puncture the tube. Thinking the tire is no good anymore and won't properly seat. Thoughts?
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Old 10-07-15, 05:26 PM
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There is something there....
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Old 10-07-15, 05:30 PM
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I'd try replacing the rim tape first. As it ages, rim tape can "stretch" slightly and allow the tube to push it out of the way allowing the tube to hit the spoke nipple and wells. The frustrating part is that when the tube deflates the rim tape slides back into position, making it hard to diagnose the cause. I'd recommend renewing your rim tape (couple of bucks) before replacing your tires.
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Old 10-07-15, 05:32 PM
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Maybe the thing that made the 1st puncture was still in the tire , un removed , to do it again? It Happens.

My Brompton Single wall rim, I took a narrow rubber rim strip and cut it down and joined it with tape I made a Hole In for the stem

then put the fused loop plastic rim strip back in on top of the rubber one , it's all Good Now..

Last edited by fietsbob; 10-07-15 at 05:36 PM.
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Old 10-07-15, 05:42 PM
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Could be the rim tape. Is it supposed to be stuck down along the edges? kinda lifts up on one side
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Old 10-07-15, 05:56 PM
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do you check the tire from the inside side maybe have somethink like little nail you cant see from outside the tire. Or do you check the rim tape if is good or if is had move and left uncovered the spoke hole? I had rear wheel and blow 8 times. LBS had give me the wrong rim tape size. I had go in other LBS the mechanic tell me i see that too the rim tape had move. Is put the rim tape is charge me $8 is not tell me i have the wrong size rim tape. Finally i buy my self one forte rim strip 18mm that is fixed my flats.
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Old 10-07-15, 06:35 PM
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It's sure a good bet that the tire or wheel is causing the flat. Is it on the rim side or the tire side? Get out the magnifying glass and keep checking until you find it. If the tire wasn't seating, you wouldn't get a little hole, you'd get an explosion.
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Old 10-07-15, 06:53 PM
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Well, this is the 3rd tube it's happened to in 2 months, 2 of them had 1/3 inch split on the rim side.. upon closer investigation and measuring a little, there is a small bump on the last 2 tubes that went flat about 5 inches from the valve stem.. measuring on the rim that is exactly where the spoke hole is. The split is about 1/4 inch away. Gonna go the the LBS in the morning
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Old 10-07-15, 07:26 PM
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I was getting repeat flats on my back rim. I finally went to my LBS and paid them to change the tube. I swear I did the same thing they did, but It's still holding air. As much as I'd rather do it myself, it was worth it to have a functioning bike.
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Old 10-08-15, 09:19 AM
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Originally Posted by ceelint View Post
Well, this is the 3rd tube it's happened to in 2 months, 2 of them had 1/3 inch split on the rim side.. upon closer investigation and measuring a little, there is a small bump on the last 2 tubes that went flat about 5 inches from the valve stem.. measuring on the rim that is exactly where the spoke hole is. The split is about 1/4 inch away. Gonna go the the LBS in the morning
It sounds like a bad rim strip. Lay a few layers of electrical tape over that spoke hole, making sure there's a bit of overlap and none of the hole edges are exposed.
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Old 10-08-15, 09:22 AM
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I'd rather just fix it than rig it... Tubes get expensive when you have to keep replacing them
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Old 10-08-15, 09:31 AM
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Originally Posted by ceelint View Post
Well, this is the 3rd tube it's happened to in 2 months, 2 of them had 1/3 inch split on the rim side.. upon closer investigation and measuring a little, there is a small bump on the last 2 tubes that went flat about 5 inches from the valve stem.. measuring on the rim that is exactly where the spoke hole is. The split is about 1/4 inch away. Gonna go the the LBS in the morning
If the hole in the inner tube lines up exactly with the spoke hole, then the problem almost certainly has something to do the with the rim strip. Take it off the rim and examine it closely. Sometimes there can be splits in the strip that don't show when the inner tube is removed but as soon as the tire is inflated the inner tube pokes through the rim strip and bursts
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Old 10-08-15, 09:46 AM
  #13  
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Originally Posted by ceelint View Post
Well, this is the 3rd tube it's happened to in 2 months, 2 of them had 1/3 inch split on the rim side.. upon closer investigation and measuring a little, there is a small bump on the last 2 tubes that went flat about 5 inches from the valve stem.. measuring on the rim that is exactly where the spoke hole is. The split is about 1/4 inch away. Gonna go the the LBS in the morning
I was having repeated flat once every week including from spokes puncturing tubes.
I took care of the issue by tightening up the spokes, 2 layers of rim tape, double face tape and Mr tuffy liners (1 liner between rim and tube + 1 liner between tire and tube). Due to those extra layers i went with smaller tubes.
Going on my 3rd year without a single flat.

Last edited by erig007; 10-08-15 at 09:50 AM.
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Old 10-08-15, 10:21 AM
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Check your rim tape for sharp edges and coverage of spoke holes. Check for protruding spokes and sharp edges to the valve hole, rim-join and spoke holes.
I prefer traditional Velox cloth rim tape.
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Old 10-08-15, 12:51 PM
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Took it to the LBS and he said rim tape.. I had the fsa strip and he said it can crack right in the middle and you'd never see it. $5 and a few minutes later I was out the door with new 16mm Velox tape on my rim. Now to test it out and order a couple more spare tubes.
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Old 10-10-15, 10:40 PM
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I have a partial roll of duct tape I take with me. I like the cloth type that is easy to rip it length or width wise. I had two flats like you describe and add several layers of duct tape ripped to the appropriate width to the rim tape and have had no more problems. that was about 2months and 1000 miles ago. The duct tape is great for first aid too. I was putting my boat on my trailer and slipped off really ripped up my shin. duct tape to the rescue until I got home and washed and dressed it appropriately.
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Old 10-10-15, 10:47 PM
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Originally Posted by KLiNCK View Post
I'd try replacing the rim tape first.
IF the hole/puncture is from where the rim tape should have been protecting it.... then what else could it be?
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Old 10-10-15, 11:03 PM
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Look for a piece of wire not much thicker than a hair and perhaps 2 mm or less long. (I believe these come from car or truck steel belted tires.) I get several a year riding around Portland. They can hide in your tire tread/casing with just very small holes on the outside and inside the casing and nothing protruding. Very, very hard to find, but if you do not get them out (tweezers or needlenose pliers), you will get another flat.

Thorns can do the same thing. They are generally easier to find but may still take some work. Also slivers of glass.

You know to within an inch where that problem is. Find it. (One reason I like patching tubes. Makes repeat offenders really obvious.) Note: the problem could be exactly the same distance/number of spokes from the valve in the other direction unless you have been tracking which way you put the tube in.

Edit: I didn't see this was on the inside of the tube.

Ben
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Old 10-11-15, 01:05 AM
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If the tire is reasonably old then that might be it, time to order a new one (and pop it in the front, moving the front one to the rear)
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Old 10-11-15, 05:44 AM
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Since it's the inner side of the tube you can rule out the tire as the cause of your flats.

I'm with the majority saying it's probably your rim strip. The rim strip has to completely cover every tiny little arc of spoke hole in your rim. If it doesn't you'll have 100 psi of air pressure trying to push and rub your inner tube against the edge of the spoke hole. I hate those plastic strips that have become so popular. I use Velox rim tape on all of my bikes. Ideally I like for my rim tape to completely cover the rim from flange-to-flange but Velox only comes in 3 widths so sometimes it doesn't quite make it.
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Old 10-11-15, 06:45 AM
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Your lbs opinion seems right. That kind of rim tape can develop little tears that aren't that visible. Inflated tubes can work into the crack and pop. There's nothing better than cloth tape.
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Old 10-11-15, 06:52 AM
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Originally Posted by alcjphil View Post
... Sometimes there can be splits in the strip that don't show when the inner tube is removed but as soon as the tire is inflated the inner tube pokes through the rim strip and bursts
I came across this very problem just a few days ago. The flaw in the rim strip wasn't apparent until it was removed.
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