Kathleen said:BB said:... what do people do about split sidewalls? A new tube (or patch)
will just blow like the first one did. Is there any way of fixing
these things just enough to get back to the trailhead?
I'd try a tire boot - a piece of plastic gallon milk jug or a dollar
bill, laid in there to try to keep the tube from herniating into the
gap.
Absolutely right. The peice of milk jug is going to be a better long-
term cure than any paper or mylar because it's got some rigidity. But
you probably won't find milk jug plastic on the trail (let's hope).
Nor will you necessarily have access to duct tape on the trail, but if
you want to try to use the tire for a little longer, tape that boot in
there when you have a chance.
I've also used just regular tire patches, usually the big square one
that comes in the patch kit that you rarely need, since snakebites are
the common tube rupture. Just slather some patch kit glue into the tire
interior around the cut, then apply the patch as directed, as if it were
being glued to a tube. Not great for the threads in the tire casing, and
the cut will still bulge out a little, but it'll get you home.
I recently discovered that Park Tool actually has a product for this,
the TB-1 Tire Boot. You get a set of three peices of plastic, about
1 1/2" x 2 1/2" with adhesive and a peel away. Sort of like the Park
glueless patches (which I don't like) but more rigid. Kind of an
expensive fix compared to bits of milk jug and duct tape, but there's
nothing faster or more convenient.
I have one in a tire that I cut on the 2nd or 3rd ride. It's now got
probably 700 miles on it, and I'm almost ready to trash it because the
tread is getting beat. Where the tear is booted is in fine shape. Not
bulging at all, and the rip has not spread.
I had a chance to give away one of the other boots to someone who
needed it on the trail. Not a bad thing to have in the tool kit, along
with zipties, duct tape, power links...
--
Tom Purvis - http://www.arkansasvalley.net/tpurvis/
"The whole problem with the world is that fools and fanatics are always so
certain of themselves, but wiser people so full of doubts."-Bertrand Russell