Tube Change Question (out of round after change)
05-08-18, 06:23 PM
#1
Senior Member
Thread Starter
Join Date: Jan 2011
Location: Pinehurst, NC, US
Posts: 1,718
Bikes: 2020 Trek Emonda SL6, 90's Vintage EL-OS Steel Bianchi with 2014 Campy Chorus Upgrade
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 454 Post(s)
Liked 164 Times
in
111 Posts
Tube Change Question (out of round after change)
I decided to combine some local errands and a ride yesterday. I picked up a nail mid-ride and (should be) no big deal as I was riding clincher tires (Gatorskins) and had both a spare tube and a cheapo patch kit. So I changed the tube - I haven't changed a ton of tubes and/or tires but this was certainly not my first or second (10th maybe). Everything went normally except as i rode off there was this rotational 'whomp-whomp' from the rear (where the flat happened). So I pulled off and it was like there was this flat place maybe 3 inches long on the tire. So I let the air out and kind of reseated the tire, and it was still there.
I was on a tight schedule at this point and was only a half mile from my meeting location, so I just rode off (taking precautions with speed) and after maybe a minute it was gone. After my meeting when I had time to look at things, there was no indication at all that there was, or had even been, a flat spot on this tire.
What happened here? Like I said I have not changed a bunch of tires in my life, but I have never encountered this before.
thanks.
dave
I was on a tight schedule at this point and was only a half mile from my meeting location, so I just rode off (taking precautions with speed) and after maybe a minute it was gone. After my meeting when I had time to look at things, there was no indication at all that there was, or had even been, a flat spot on this tire.
What happened here? Like I said I have not changed a bunch of tires in my life, but I have never encountered this before.
thanks.
dave
05-08-18, 06:50 PM
#2
Really Old Senior Member
Thanks for telling us WHERE the flat spot was.
05-08-18, 06:57 PM
#3
Senior Member
I'm taking a guess, but it sounds like your tube may have gotten twisted inside the tire at that point and then eventually just worked itself out. Anybody else see that as a possibility?
05-08-18, 08:29 PM
#5
Senior Member
My guess is the bead didn't seat properly and after riding for a while, it popped into place. I have a Campy wheel that I have trouble getting the bead to seat correctly, and I had the same thing happen to me with that wheel. Now, when I have to put a tire tire on it, I pump it to about 20 PSI and go around seating it with my fingers. Then I inflate to the proper PSI.
05-08-18, 08:48 PM
#6
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,162
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4237 Post(s)
Liked 3,963 Times
in
2,359 Posts
Bill asked the question of where (well, sort of asked
) for a reason. Of course you replied in what seems like a snarky attitude.
So let's move on and address what might have happened. One likely possibility is that when you re inflated the tire the bead didn't seat properly in one part of the circumference. Likely the bead was still stuck deeper into the rim there. As you road along that portion of the tire popped out, seating properly. When you got to the shop there was no portion miss seated any more, so the wrench didn't find what wasn't a problem any more. What I would do is to remove the tire and remount it just to make sure there's not another issue.
Back to Bill's post. What I suspect he was wondering about is that if the bead was too high off the rim (and this would still feel out of round when riding. It can be hard to tell a high from a low spot when riding) then there was the risk of the tube herniating out and blowing. Or the brake pad could lathe cut through the tire's side wall and the tube will again blow out.
Granted this possibility has less probability of self correction compared to a tire bead stuck too deep. But that's what I suspect he was going for. Andy
) for a reason. Of course you replied in what seems like a snarky attitude.So let's move on and address what might have happened. One likely possibility is that when you re inflated the tire the bead didn't seat properly in one part of the circumference. Likely the bead was still stuck deeper into the rim there. As you road along that portion of the tire popped out, seating properly. When you got to the shop there was no portion miss seated any more, so the wrench didn't find what wasn't a problem any more. What I would do is to remove the tire and remount it just to make sure there's not another issue.
Back to Bill's post. What I suspect he was wondering about is that if the bead was too high off the rim (and this would still feel out of round when riding. It can be hard to tell a high from a low spot when riding) then there was the risk of the tube herniating out and blowing. Or the brake pad could lathe cut through the tire's side wall and the tube will again blow out.
Granted this possibility has less probability of self correction compared to a tire bead stuck too deep. But that's what I suspect he was going for. Andy
05-09-18, 07:09 AM
#7
Senior Member
Join Date: Feb 2017
Location: Concord, NC
Posts: 712
Bikes: 1984 Bianchi Tipo Corsa, 1985 Cannondale SM600 (24/26)
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 244 Post(s)
Liked 354 Times
in
193 Posts
I agree that the bead is probably not searef properly. Deflate, make sure tube is in right and ... may sound crazy...but try using some baby powder as a "lubricant" when reinstalling the tire.
05-09-18, 09:11 AM
#8
Senior Member
Join Date: Oct 2006
Posts: 58
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
Probably just poorly seated on the rim. When I install a tube, I partially fill the tube and then deflate. Then check the bead all the way around the rim by squeezing the sides in. Then re-inflate. As per Bianchi84's suggestion, store your spare tube in a bag with baby powder.
05-09-18, 11:27 AM
#9
Senior Member
Thread Starter
Join Date: Jan 2011
Location: Pinehurst, NC, US
Posts: 1,718
Bikes: 2020 Trek Emonda SL6, 90's Vintage EL-OS Steel Bianchi with 2014 Campy Chorus Upgrade
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 454 Post(s)
Liked 164 Times
in
111 Posts
For clarification, the issue was clearly that there was a flat spot on the outside of the tire (i.e., where the tire touches the road). You could see it when you just spun the wheel on its axis.
It sounds like tire seating and or tube seating was the issue and that this does happen on occasion. And I am guessing that it was the tube somehow as I did take a pretty careful look at the seating of the tire, reseated it, and still had the issue. And the baby powder thing is probably a good idea.
dave
ps. Re: Post #5 - my response was snarky??? I did not know if it was a question or a complaint about a poorly worded post (still not sure). So I stated that and answered the question (if there was one) politely, I think. **********
It sounds like tire seating and or tube seating was the issue and that this does happen on occasion. And I am guessing that it was the tube somehow as I did take a pretty careful look at the seating of the tire, reseated it, and still had the issue. And the baby powder thing is probably a good idea.
dave
ps. Re: Post #5 - my response was snarky??? I did not know if it was a question or a complaint about a poorly worded post (still not sure). So I stated that and answered the question (if there was one) politely, I think. **********
