Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-28-11, 08:04 PM   #1
EpicSchwinn
Just smang it.
Thread Starter
 
EpicSchwinn's Avatar
 
Join Date: Feb 2011
Location: Spokane
Bikes: '88 Trek 2300 Composite, '11 Dawes Deadeye
Posts: 2,247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Tire won't stay seated

I bought a wheelset (eighth inch amelia's) that came with tires and tubes pre-installed. When I started pumping them up, I noticed the bead wouldn't stay seated. I know this is usually due to part of the tube being between the tire and the rim, but I checked all around and that isn't the case. It looks to me like the tire is actually stretched out or warped. Is there any way to get this to mount up evenly?

Yes, I know these are dirt cheap tires, but I would at least like to get a few miles out of them.

Pic of bulging section @60 psi (120 is recommended) Note the hash marks showing near the rim:

Pic of normal section (60 psi):
EpicSchwinn is offline   Reply With Quote
Old 02-28-11, 09:00 PM   #2
MilitantPotato
Subjectively Insane
 
MilitantPotato's Avatar
 
Join Date: Jul 2008
Location: Saint Louis, Missouri
Bikes: '09 Rodriguez Adventurer Custom, '08 Trek 7.3Fx
Posts: 802
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The "normal" section seems too far into the rim, I'm guessing it's opposite of the "buldging" section.

A little of the bead-seat showing isn't uncommon, deflate the tube, reposition the tire so that it's more-or-less even throughout, and inflate slowly.

I put ~10psi in the tire, then tug on the sections too far into the rim so the bead gets seated, then continue pumping.

I've had two different sets of tires that where made too wide, both blew off the rim at anything above 30psi. It took NO effort to mount the tires, and setting the wheel down without air in the tubes caused the tires to slide off, since the inside diameter of the tire was the same size, or only very slightly smaller than the rim.

If indeed your tires are made over-sized, and they won't seat properly, don't ride them. Having a tire unmount while riding is NOT going to end well.

Last edited by MilitantPotato; 02-28-11 at 09:05 PM.
MilitantPotato is offline   Reply With Quote
Old 02-28-11, 09:12 PM   #3
desertdork
just pokin' along
 
desertdork's Avatar
 
Join Date: Aug 2008
Location: the desert
Bikes:
Posts: 1,073
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't see any bulging. What I do see is one section of tire that looks to be fully seated and another section that has yet to fully seat. I'd fully inflate the tire to get the bead seated against the hook throughout the rim's circumference. If there's still some variance, I'd deflate to low psi, work the tire a bit manually and then inflate again.
desertdork is offline   Reply With Quote
Old 02-28-11, 10:15 PM   #4
TLCFORBIKES
Senior Member
 
TLCFORBIKES's Avatar
 
Join Date: Feb 2010
Location: Raleigh NC
Bikes: 1983 Gureciotti/full SR 2002 Casati Record 10 speed 1995 Colnago C40 2007 Sram Rival 2006 Isaac Sram Force 2000 DEAN Ti DA 10 speed 1987 Schwinn Prologue Funny Bike 2001 Pinarello DA 9 speed 2008 Element6 Record 10speed Origin8 Lutegra10speed
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I spray silicone along the tire bead where you notice the tire not seating properly. Then inflate the tire (to 120 or a little more). The tire should seat properly.
TLCFORBIKES is offline   Reply With Quote
Old 02-28-11, 10:15 PM   #5
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by desertdork View Post
I don't see any bulging. What I do see is one section of tire that looks to be fully seated and another section that has yet to fully seat. I'd fully inflate the tire to get the bead seated against the hook throughout the rim's circumference. If there's still some variance, I'd deflate to low psi, work the tire a bit manually and then inflate again.
+1
Try what desertdork says.
Al1943 is offline   Reply With Quote
Old 02-28-11, 10:50 PM   #6
EpicSchwinn
Just smang it.
Thread Starter
 
EpicSchwinn's Avatar
 
Join Date: Feb 2011
Location: Spokane
Bikes: '88 Trek 2300 Composite, '11 Dawes Deadeye
Posts: 2,247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by MilitantPotato View Post
The "normal" section seems too far into the rim, I'm guessing it's opposite of the "buldging" section.

A little of the bead-seat showing isn't uncommon, deflate the tube, reposition the tire so that it's more-or-less even throughout, and inflate slowly.

I put ~10psi in the tire, then tug on the sections too far into the rim so the bead gets seated, then continue pumping.

I've had two different sets of tires that where made too wide, both blew off the rim at anything above 30psi. It took NO effort to mount the tires, and setting the wheel down without air in the tubes caused the tires to slide off, since the inside diameter of the tire was the same size, or only very slightly smaller than the rim.

If indeed your tires are made over-sized, and they won't seat properly, don't ride them. Having a tire unmount while riding is NOT going to end well.
Tried this along with a little lubricant along the bead. All went well! Thanks guys!
EpicSchwinn is offline   Reply With Quote
Old 02-28-11, 11:14 PM   #7
enim
Senior Member
 
Join Date: Jul 2009
Location: Chicago, Il
Bikes: Self-built EightInch fixed-gear.
Posts: 83
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I had endless problems with those tires when I bought my set. The same thing would happen, except it would come completely unseated. It took me a solid 10 minutes to inflate it super slow and keep it even. Just get new tires.
enim is offline   Reply With Quote
Old 03-01-11, 10:49 AM   #8
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 16,360
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Quote:
Originally Posted by TLCFORBIKES View Post
I spray silicone along the tire bead where you notice the tire not seating properly. Then inflate the tire (to 120 or a little more). The tire should seat properly.
No need to get all high-tech. Squirt a little dish detergent in some water and use a rag to spread it along the bead. Works like a champ!
JohnDThompson is offline   Reply With Quote
Old 03-01-11, 07:18 PM   #9
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Bikes:
Posts: 2,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by JohnDThompson View Post
No need to get all high-tech. Squirt a little dish detergent in some water and use a rag to spread it along the bead. Works like a champ!
i keep an old dish soap bottle full of water and a few drops of soap handy. squirt it all over the rim, make a mess and inflate. works great.
reptilezs is offline   Reply With Quote
Old 03-01-11, 07:43 PM   #10
TLCFORBIKES
Senior Member
 
TLCFORBIKES's Avatar
 
Join Date: Feb 2010
Location: Raleigh NC
Bikes: 1983 Gureciotti/full SR 2002 Casati Record 10 speed 1995 Colnago C40 2007 Sram Rival 2006 Isaac Sram Force 2000 DEAN Ti DA 10 speed 1987 Schwinn Prologue Funny Bike 2001 Pinarello DA 9 speed 2008 Element6 Record 10speed Origin8 Lutegra10speed
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by JohnDThompson View Post
No need to get all high-tech. Squirt a little dish detergent in some water and use a rag to spread it along the bead. Works like a champ!
Silicone spray isn't "high-tech" - just what I have at the shop. It cost $2.50 for a 24oz can (full retail price - not dealer cost). :-)
It is very clean and will evaporate and is very fast/easy to use. Give it a try sometimes. The old soapy water trick will work but I usually do not have any at the store.
TLCFORBIKES is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:15 PM.