Anyone know of any tubular repair info? I have to give this a try, as I have several tubulars with good tread left.
I was hoping I could do a localized repair. Just try and pull off about 6 to 8 inches of tire off the rim, separate the base tape and then cut the thread to open the tire and patch the tube.
I may need to boot the tire as well.
What kind of thread and needle and how to patch a latex tube as well as boot the tire should cover most aspects of repair. Thanks for any help on the subject.
Let me tell you straight away that what you're wanting to try won't work or at least it will be so hard you'll want to remove the tubular from its rim at some point anyhow.
On the materials side you'll need:
Some cotton or silk yarn.
I use dental floss from Johnson & Johnson (?), the flat one which is very strong and since it's waxed it's easy to pull through the existing holes.
A pair of scissors.
A needle that fits through the existing holes. You don't want to widen those any more than strictly necessary.
A straight needle works fine but a hook shaped one is easier to work with.
A latex patch that you rounded so it does not present any sharp edges. Those edges tend to curl making for a small irregularity which may be the cause of your next puncture.
Make it as small as need be.
Patching cement, basically this is rubber cement as used to patch butyl inner tubes. Just make sure it bonds latex as well. Not all of them do.
Cleaning alcohol to clean the punctured area so the cement sticks to the latex properly.
Cement to reglue the the base tape back on. Barge cement if you can get it if not I use carpet layers' latex based glue.
A piece of old tubular rim is not really needed but it's very handy to have around as it allows for a support while your base tape reglue job is drying.
Bring lots of patience too.
Let me tell you it's not as difficult as it sounds but it does take some care to get the stitching right and putting the base tape where you want it isn't always easy either.
In general, the better quality tyres are the easiest to fix.
The real challenge is to repair without anyone able to tell: pull the stitches too tight or too loose and your tyre is not going to end up round.
I'll see what I can dig up from the forum's archives and complete it if needed but this matter has indeed been discussed before albeit it quite some time ago.
In all honesty, I rarely ever resort to thread and needle anymore. Only if the tubular is brandnew and very valuable I would repair it the "old" way.
With the advent of liquid latex repair a la Tufo things have become much easier. Once you get the hang of it, it's mostly just a matter of pouring in the right amount for the job and be done with it.
Still, if you guys want any do's and don'ts, or even some sort of tutorial I'm willing to help out.