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 04-06-06, 08:20 PM   #1
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Tire problem

My old bike had 27"x1 1/8" tires on it and they were in bad shape. I replaced them with some bell tires which were sized for 27"x1 1/8 and 27"x1 1/4" amd 27x1 3/8". These new tires were out of round by atleast 3 to 4 mm. Now when I ride on pavement I get a bump on every rotation of the wheel.

How do I fix this? Do I need to buy a tire for size 27"x1 1/8" only? Is there some trick to putting a tire on the rim to get it centered better. Any suggestions including what brand tire to buy will be appreciated.
jim p is offline   Reply With Quote
Old 04-06-06, 09:25 PM   #2
cooker
Prefers Cicero
 
cooker's Avatar
 
Join Date: Jul 2005
Location: Toronto
Bikes: 1984 Trek 520; 1990s Peugeot (Canadian-made) rigid mountain bike; 2007 Bike Friday NWT; misc others
Posts: 10,234
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 136 Post(s)
You may simply have a kink in the inner tube. Deflate the tube, pry one side of the tire out of the rim, pump the tube up slightly and examine all the way around to make sure it is evenly placed around the rim, then deflate it and remount that side of the tire.
Also when you finally start to reinflate it, push the stem a bit into the rim to make sure that the reinforced area of the tube around the stem is inside the tire bead and not trapped under it
cooker is offline   Reply With Quote
Old 04-06-06, 09:52 PM   #3
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the suggestion Cooker. I have deflated the tube several times and tried to get the tire equal around the rim with no success. I took the old tire and put it on the rim and when I inflated it there was a pop when the tire seated on the rim. This new tire does not even try to seat on the rim. If I move one position of the tire on the rim then another position will be out of round. I am thinking about spraying the tire with something like WD40 and pumping it up until it explodes or seats on the rim and then setting the pressure correctly assuming that I am not wearing the tire as a necktie.
jim p is offline   Reply With Quote
Old 04-06-06, 10:16 PM   #4
rat_factory
= cyclist's tan
 
rat_factory's Avatar
 
Join Date: Jun 2005
Location: the big D in the big T
Bikes: '82 Miyata 310, '87 Scott Boulder, '87 Schwinn Le Tour, '91 Cannondale SM500, '96 Schwinn Clear Creek, '99 Schwinn MesaGS, '05 Rockhopper
Posts: 297
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
First put down the can of wd40.
Did you by chance purchase the Bell Streetster 27x1&1/4 with the reflective sidewall at superduperWallfartMart? I had the same problem with these 'tires'. They never seated properly and the tube exploded out of them causing me temporary deafness for a whole day.
If you must keep them, powder your hands with cornstarch and coat the tube with it also.
Push the valve in while seating.
Check, adjust, and recheck seating at least for 15 minutes.
Inflate slowly watching seating.
Accept the poor quality and unroundness.
Thats what I did, but then again I am not currently riding that bike as I'm still building it.
rat_factory is offline   Reply With Quote
Old 04-06-06, 10:31 PM   #5
enduro
Eschew Obfuscation!
 
enduro's Avatar
 
Join Date: Oct 2004
Location: over here!
Bikes: 2005 Rocky Mountain ETSX, Surly Crosscheck, 2000 Enduro Expert (sold), 1999 Rockhopper, 1984 Trek 520 (STOLEN-but recovered!), $7 rigid MTB from a police auction (broken, then stolen)
Posts: 591
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rat's procedure is pretty much right on in my experience.

I have some of those Bell tires on my campus bike, they're super cheap and are manufactured with very poor tolerances. I've just had to take the time to pump them up to say 20 psi, check roundness, then deflate and fix the trouble spot. Repeat this process until they're rideable. The best I could get them was a few mm in every direction, which is not noticeable while riding.

BTW, be careful about inflating them to their max recommended pressure. They tend to develop bad bulges which ruin the tire.
enduro is offline   Reply With Quote
Old 04-06-06, 11:38 PM   #6
spunkyruss
Senior Member
 
spunkyruss's Avatar
 
Join Date: Sep 2005
Location: Hatfield, PA
Bikes: '64 Schwinn Traveler, '73 Astra Tour de France, '79 Fuji Gran Tourer, '86 Dahon folder, '94 Specialized Hardrock, '95 GT Timberline, 2005 Jamis Aurora
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Do you have to go through that every time that you install these tires, or does the tire remember how to behave after you beat it into submission during the first successful installation?

If you have to go through this every time, then repairing a flat along the side of the road will be a nightmare.
spunkyruss is offline   Reply With Quote
Old 04-06-06, 11:53 PM   #7
the beef
100% USDA certified
 
the beef's Avatar
 
Join Date: Feb 2006
Location: Seattle -> NYC
Bikes: Bianchi XL EV2
Posts: 4,022
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You might want to try a slightly more expensive set of tires. I used to have to go through the process of checking seating/rounding every time I replaced a tube, but I got a pair of better tires and that ritual is no more. You can pick up some good tires in your wheel size for probably $20 or so.
the beef is offline   Reply With Quote
Old 04-06-06, 11:58 PM   #8
silversmith
Yet another vegan biker
 
Join Date: Dec 2005
Location: Trapped behind the corn curtain
Bikes: Sakae Prism, Vintage Fuji bike(S), too many bikes, one from scratch bike.
Posts: 965
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
First put down the can of wd40.
Did you by chance purchase the Bell Streetster 27x1&1/4 with the reflective sidewall at superduperWallfartMart? I had the same problem with these 'tires'. They never seated properly and the tube exploded out of them causing me temporary deafness for a whole day
CRAP! Friggin Walmart ripped me off with these pieces of junk, too. They did the same thing.

Nashbar has a tire sale on. Much better than getting ripped off by the Walton Gang-- http://www.nashbar.com/subcategories...1&SRCCODE=1628
silversmith is offline   Reply With Quote
Old 04-07-06, 12:32 AM   #9
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think it's time for a new tire.
operator is offline   Reply With Quote
Old 04-07-06, 05:09 AM   #10
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok. You guys nailed the problem. I want things to be as round as possible so it is back to walmart for a refund. I looked at Nashbar tires but of the tires listed which of the low cost tires will give me a round wheel. My nearest bike shop is about 35 miles away but I may have to make the drive and see what they can do for me.

Thanks for the corn starch idea.
jim p is offline   Reply With Quote
Old 04-07-06, 07:05 AM   #11
mactheknife68
Always find my way home
 
Join Date: Dec 2005
Location: Kankakee, IL
Bikes: Madone, 8500
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ive had some success with cheap tires by spraying Windex on the offending sections where the bead doesnt seat, then overinflating slightly letting them sit awhile. By slightly I mean 15-20lbs over max recommended pressure stamped on sidewall. But i suspect yer at yer limit with patience for these tires.. a lil more $ saves a lot in headaches.
mactheknife68 is offline   Reply With Quote
Old 04-08-06, 07:41 PM   #12
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I picked up some pyramid tires today and used starch on the tube and tire bead. I had the same problem but this time I knew what to try due to all the suggestions. I was able to get the tires within about 1mm and there are no bumps as the tire rotates so I am good to go. Now that I know what to do I might could get the bell tires to center up good enough to use but then again I might not be that good yet.

I got some 1 1/4" tires so I think that they are going to be good on hard packed dirt roads as well as the pavement.
jim p 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 12:01 AM.