Author Topic: Had a flat tire, now I have a wobble... Ideas?  (Read 3106 times)

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aaronk

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Had a flat tire, now I have a wobble... Ideas?
« on: September 03, 2008, 04:43:51 PM »
I had my first flat (nail through rear tire) a couple weeks ago.  I was in the middle of a 6 lane highway so I carefully rode the bike over (on the now completely flat tire) to the sidewalk to get it out of traffic.  Had my local shop inspect the tire, put in a new tube, and re-balance.  The tire checked out OK, no visible damage, but the wheel weights that were on it were in the wrong spot.  I take the wheel home and reinstall.  I was able to get the wheel off and back on without loosening the tensioners and everything installed exactly the same way it looked before I took it off.  Alignment marks match and are even on both sides.

With all this said, the bike feels different now.  The best way I can describe it is that the rear seems to have a slight wobbly feel to it at slow speeds and especially if I start weaving it back and forth in the lane.  I'm not riding it until I get it figured out, because it doesn't feel safe...

Wheel bearings seem good, there is a slight amount of play in the swingarm, but not anything I wouldn't consider normal.  When I spin the wheel it looks to spin true.  Does anyone know what could cause this feeling?  Did I do some internal damage to the tire when I rolled on it, or could the replacing of the wheel weights make me feel this?  Any ideas would be appreciated.

Thanks!

troppo

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #1 on: September 03, 2008, 04:58:01 PM »
Is there a slight buckle in the wheel?
Put it on the center stand and spin the wheel, you`ll soon see if theres a buckle in it

KingCustomCycles.com

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #2 on: September 03, 2008, 05:24:30 PM »
broken or distorted plys or cords, not from the nail, but from rolling her flat. Tire is done, but you don't trust it anyway so get that new one ordered tonight.  :)
« Last Edit: September 03, 2008, 05:29:29 PM by KingCustomCycles.com »

Offline kghost

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #3 on: September 03, 2008, 05:45:06 PM »
Check for loose spokes while your at it.

They did install new weights when they put the new tube in and the tire back on right? Meaning they did rebalance the tire/rim/tube combination?
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eldar

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #4 on: September 04, 2008, 06:31:41 AM »
They may have also twisted or kinked the tube in some way that having it on the center stand would not show.

Offline goon 1492

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #5 on: September 04, 2008, 06:38:19 AM »
If they already balanced the rim you shouldn't do anything to the weights, they are their to balance the rim, and if you moved the weights you just knocked the rim off balance. Unless I missunderstood what you described, also if there is any play in the swing arm that will cause a wobble, How trustworthy is the shop you took the bike to?
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Offline kghost

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #6 on: September 04, 2008, 02:53:31 PM »
If they already balanced the rim you shouldn't do anything to the weights, they are their to balance the rim, and if you moved the weights you just knocked the rim off balance. Unless I missunderstood what you described, also if there is any play in the swing arm that will cause a wobble, How trustworthy is the shop you took the bike to?

Sorry Brother....Thats flat wrong.

Tire. Rim, and tube are balanced together.

If you move the position of the tire on the rim....you've changed the balance.

Only way it could possibly keep it balanced is to put the tire back on in exactly the same spot.

That rarely happens.

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Offline Clyde

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #7 on: September 04, 2008, 05:56:48 PM »
If the wobble is at slow speed, wheel balance is unlikely to be the cause.
Is the tyre sitting correctly on the rim?
Obvious, but have you checked the tyre pressure?
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aaronk

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #8 on: September 04, 2008, 06:00:49 PM »
To clarify, the shop said the old weights were in the wrong spot, as they had to move the weights when they did the rebalance.  Of course, the tire did change positions on the rim when they put it back on so that's not much of a surprise.  They balanced the whole tire, tube, and rim combo. I did not touch the weights after this.

The swingarm play is enough to feel but not enough to see anything moving.  Also, I'm fairly confident that any play that I have now was probably there prior to the flat.  

Tire pressure is the same as what I was running before and is the recommended pressure on the spec plate from the rear fender. I'm leaning towards the tire being shot at this point...

KingCustomCycles.com

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #9 on: September 04, 2008, 07:08:34 PM »
I would lean all the way over to the nearest tire store.

Offline goon 1492

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #10 on: September 05, 2008, 09:23:48 AM »
If they already balanced the rim you shouldn't do anything to the weights, they are their to balance the rim, and if you moved the weights you just knocked the rim off balance. Unless I missunderstood what you described, also if there is any play in the swing arm that will cause a wobble, How trustworthy is the shop you took the bike to?

Sorry Brother....Thats flat wrong.

Tire. Rim, and tube are balanced together.

If you move the position of the tire on the rim....you've changed the balance.

Only way it could possibly keep it balanced is to put the tire back on in exactly the same spot.

That rarely happens.



 I was mis understood, I know that silly :P , I meant that if it was balanced and the weight was moved after that your not balanced anymore ;D I should have mentioned balanced after assembly.....Believe me I know about balancing tires after going to school to become a mechanic 10yrs ago, I have balanced and plugged more than my share of them in training(we actually had a tire that had over 100 plugs in it and it still held air on the donated station wagon we worked on ??? ;D.
On the other hand like the KING said I definetly would get a new tire after a flat, tires are cheaper than a crazy doc. bill after blowout and crash....
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Offline HondaMan

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #11 on: September 05, 2008, 12:04:33 PM »
One other thing that hasn't been mentioned here: look closely at the tire alignment ridges near the wheel rim. These are tiny ribs that are cast onto the side of the tire as indicators to show you if the bead is seated perfectly all the way around. They should be parallel to the rim, all the way around. If they are not, the tire is not going to be round, nor aligned, and it will cause a low- and mid-speed wobble.

Often, deflating a misaligned tire, soaping up the bead and loosening it, then re-seating and overinflating, then dropping the air PSI down to normal pressure, will slip the bead into its final resting place, making these indiactors run true and parallel. If yours has tire grips, and you deflated and moved the tire without also releasing the clamps, chances are that you've misaligned the bead. These indicators will tell you the story: that's why they are there.  ;)
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Offline goon 1492

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Re: Had a flat tire, now I have a wobble... Ideas?
« Reply #12 on: September 10, 2008, 06:48:10 AM »
One other thing that hasn't been mentioned here: look closely at the tire alignment ridges near the wheel rim. These are tiny ribs that are cast onto the side of the tire as indicators to show you if the bead is seated perfectly all the way around. They should be parallel to the rim, all the way around. If they are not, the tire is not going to be round, nor aligned, and it will cause a low- and mid-speed wobble.

Often, deflating a misaligned tire, soaping up the bead and loosening it, then re-seating and overinflating, then dropping the air PSI down to normal pressure, will slip the bead into its final resting place, making these indiactors run true and parallel. If yours has tire grips, and you deflated and moved the tire without also releasing the clamps, chances are that you've misaligned the bead. These indicators will tell you the story: that's why they are there.  ;)

good point hondaman, I don't know how I missed that one, many times in my child hood of changing bike tires and not getting the tire bead lined up all the way makes for real fun on the first hill... ya know how we all had to hit that hill as soon as we got the new shoes on the bikes too.  ;D ;D ;D
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