Am I stupid or what?
#26
Veteran Racer


Joined: Jul 2009
Posts: 11,854
Likes: 913
From: Ciudad de Vacas, Tejas
Bikes: 34 frames + 80 wheels
Let's see a photo of the inside of your rim near the valve hole. Remove all the rim strips so we can see if there's anything rough on the rim surface.
#27
Senior Member
Joined: Apr 2009
Posts: 111
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Ok, I thought you meant 1 or 2 cm towards the side of the rim.
Try a layer of Hockey tape, you can rip it to width pretty easily.
I dunno what else.
Wait, are you running fixed with no brakes?
Sometimes, the tube and tire will actually move (rotate around the rim) and it's ripping because the stem won't move with it. I guess it's more accurate to say the constant skidding/braking back and forth movement over that spoke hole.
Hope that makes sense.
Try a layer of Hockey tape, you can rip it to width pretty easily.
I dunno what else.
Wait, are you running fixed with no brakes?
Sometimes, the tube and tire will actually move (rotate around the rim) and it's ripping because the stem won't move with it. I guess it's more accurate to say the constant skidding/braking back and forth movement over that spoke hole.
Hope that makes sense.
Last edited by duckforcover; 09-14-10 at 04:40 PM.
#28
Thread Starter
Junior Member
Joined: Sep 2010
Posts: 13
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I'm running fixed but i do have a front brake. Here's the rim https://i335.photobucket.com/albums/m...9-14at1635.jpg
#29
Senior Member
Joined: Apr 2009
Posts: 111
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If what I described is what you think is happening, then it just part of running fixed... and you probably ride hard enough to make it happen over time.
The only thing I can think of is to actually glue one bead to the rim with tubular cement, that way you can still get the tube out from the other side in the future.
But it might be a little tougher to change tubes this way.
The only thing I can think of is to actually glue one bead to the rim with tubular cement, that way you can still get the tube out from the other side in the future.
But it might be a little tougher to change tubes this way.
Last edited by duckforcover; 09-14-10 at 04:52 PM. Reason: finish thought
#30
Thread Starter
Junior Member
Joined: Sep 2010
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Here's the thing that is really nuts. My tubes blow out when it's just sitting there. Like deflate in 1 second. I had just gotten both tubes replaced and had the bike behind my seat in my van and 30 minutes after they were replaced "pffffffft" first tube went, then I went inside for a few minutes and when I came back out the other tube had blown.
#36
Old fart



Joined: Nov 2004
Posts: 26,318
Likes: 5,231
From: Appleton WI
Bikes: Several, mostly not name brands.
I'm running fixed but i do have a front brake. Here's the rim https://i335.photobucket.com/albums/m...9-14at1635.jpg
Are you perhaps using a Presta valve tube in there without some sort of grommet to take up the slack?
#38
Old fart



Joined: Nov 2004
Posts: 26,318
Likes: 5,231
From: Appleton WI
Bikes: Several, mostly not name brands.
Well, this might be the solution: https://www.biketoolsetc.com/index.cg...tem_id=WB-PSS1
#40
Surf Bum
Joined: Aug 2008
Posts: 2,184
Likes: 5
From: Pacifica, CA
Bikes: Lapierre Pulsium 500 FdJ, Ritchey breakaway cyclocross, vintage trek mtb.
How come the rim edge looks all chewed up? Are you using some sort of screwdriver or something to pry the tire on/off at that location?
#42
Senior Member
Joined: May 2007
Posts: 1,959
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From: Flagler Palm Coast, FL
Bikes: 1986 Fuji Allegro 12 Spd; 2015 Bianchi Kuma 27.2 24 Spd; 1997 Fuji MX-200 21 Spd; 2010 Vilano SS/FG 46/16
If you let the valve go back to it's natural position in your pic, is that flat puncture at the base of the valve ? If it is, it looks like the valve stem hole on the rim is the culprit and it's either razor sharp or has a bur ? Sand it cleaner and/or smoother. Then you could tape over the hole and then cut a cross patterned slit in the tape over the stem hole. Rather than cut that tape completely out, just put the valve stem thru it and the tape should be between the metal and rubber tube. Might be a tighter fit to get the valve stem thru the rim hole, but at least there's a cushion of tape between the tube and rim hole.
On the Presta valve, are you using the valve nut and how tight is that if you are using it to secure the Presta valve ?
On the Presta valve, are you using the valve nut and how tight is that if you are using it to secure the Presta valve ?







