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Tube ?? for tire guys ...

C

Clefus

Member
Never had many problems till this situation on fixing a tube so heres the jist :
Tires are new 15.5 - 38's bought one new tube from the guy I bought the tires ....new tube a foreign one...for bias tires....tube was marked as fitting 13.9 to 15.5 - 38....
Now I had a flat and have had repeated problems with patches not holding/ripping ect.....never had a problem before patching a tube....
I compared the old tube to the new....old tube ( 18" across deflated tube) is 6" in circumference greater than the new tube ( 15" across deflated tube) ....
Do I have the wrong size tube even though it was marked for that tire?? or just a bad tube??

Thanks
Dave
 
I haven't run into these problems with tubes but I have learned that anything touched by human hands can be done wrong. Tubes do stretch to fit the size tire they are in so it isn't uncommon for a new tube to be some smaller than an old one. If you are having problems with your patches holding then I would suggest having the seller repair the next hole and see if he can make it hold. If it doesn't then he can see it and decide if the tube is defective. If the tube is ripping under the patch then the problem may be with your repair process or the materials you are using. There are ways to fix them more involved that sticking a patch on the tube.
 
Is it just me or is that foreign made rubber not worth a toot anymore. There's no flexibility to it. Looked at some tarp straps the other day that wouldn't stretch an inch.

Irv*
 
If a standard glue-on and stick patch faile don a tube of mine more than once.. i'd repalce the tube. i hate breaking down tires...

soundguy
 
If you are not stretching the tube when installing the patch, are not buffing it, using good glue, cleaning it good, then patch might be failing due to not installed properly. Learned that lesson a looonnnggg time ago.
Jim
 
You have to fill the tube up to at least the size it is inside the tire. Doesn't matter if its a bike tire or a tractor tire. The patch won't stretch like the tube does. When I patch a tube or a tire I always buff the area with a buffer, then use liquid buffer on it. Use good rubber cement and let it dry. Then select a patch that is smaller than the area just buffed, etc. Don't touch the sticky areas. Roll it down good. I've never had any not stick this way. The big thing is inflate the tube before you stick the patch on.
 
What would you use to clean the tube with after buffing it? The stores that sell the patching supplies do not have anything for that.
 
Good thing I read here how to patch tubes. Been doing wrong on a daily basis for 15 years. I guess it depends on what patching system you use but the ones I use for tubes (Rema) stretch with the tube. I always put the patch on a deflated tube. It is much easier to get the patched stitched down that way and I want it deflated to put in the tire anyhow. I don't know what patches you are using but if they don't stretch I think you are using the wrong ones. I have been to school on how to patch tubes but without seeing the tubes it is really impossible to guess what his problem is. I know there are many "experts" here but it sounds to me like he needs to get this problem to someone who does it for a living and has to know how to fix it right.
 
i've had to patch several tubes on my sons race motorcycle. after patching, i take a couple small pieces of prefinished hardwood floor put 1 on each side of the patch(shiny side towards the tube) and clamp overnite. never had one go bad, and most of his races won, were on patched tubes.

my 2 cents worth....
 
heres what happened to me today. had to replace to bad tires on a b414 600 16 my tire guy brough them out couple tubes for the front one rear. was putting the front ones on i had told him to bring the less expencive well hell cheap ones not bad looking tires then the catch got tube out. added little air there firestone made in chinna. they wernt any bigger around then 4 inch pipe. wont have to worrie about a creaaze in them put them in aired them up tire still holding. i betting if you had to patch them the patch would tear loess from them having to strech so far.
 
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