Pinch flat...is this normal?
Brett Jaffee
flat today. Odd thing (I think) is that the tear/slit was on the inner
part of the tube...ie, the part that is contacting the rim, not the tire.
Is that unusual?
I have been trying lower tire pressures, but I thought pinch flats usually
occured on the side of the rim.
bomba
> I havent been riding too long, and got what I assume was my first pinch
> flat today. Odd thing (I think) is that the tear/slit was on the inner
> part of the tube...ie, the part that is contacting the rim, not the tire.
> Is that unusual?
No, perfectly normal.
> I have been trying lower tire pressures, but I thought pinch flats usually
> occured on the side of the rim.
Pinch flats occur when the tube is crushed between the object and rim - it
is usually the rim that causes the holes / slits. If you pinch flat, it is
a sure sign that you're running your pressures too low.
--
a.m-b FAQ: http://www.j-harris.net/bike/ambfaq.htm
a.bmx FAQ: http://www.t-online.de/~jharris/bmx_faq.htm
Brett Jaffee
my luck (or lack of skill), as it was a new rim.
Oh, after re-reading my post...what I should have said was that I thought
pinch flats usally occured on the sides of the tube. My impression was
that the slits usually came in "snake bite" pairs. This one was a single,
right on the centerline of the inside of the tube.
Not that it matters...obviously I hit something. :)
bomba <myar...@hotmail.com> wrote in
news:pan.2004.02.11....@hotmail.com:
Westie
<snip>
> If you pinch
> flat, it is a sure sign that you're running your pressures too low.
...or that your pressures are in a reasonable range, but you ride in such a
way that you smash those tyres hard against objects that wouldn't normally
pinch flat for the majority of people. Learn to ride more 'smoothly' and
avoid smashing wheels against things. In the meantime, as bomba more or
less said, increase the pressures to counter-act the problem.
--
Westie (been there, done that, bent and broken those...)
(Replace 'invalid' with 'yahoo' when replying.)
bomba
> D'oh, and after a closer look, the rim (Mavic 223) has a small dent...just
> my luck (or lack of skill), as it was a new rim.
Oh dear, someone's learning the hard way...
> Oh, after re-reading my post...what I should have said was that I thought
> pinch flats usally occured on the sides of the tube. My impression was
> that the slits usually came in "snake bite" pairs. This one was a single,
> right on the centerline of the inside of the tube.
You must have squished it on just one side of the rim. That's less common
for sure.
PS - http://www.j-harris.net/bike/ambfaq.htm#1.2.1