2yrs of use since tire installed without tube trouble inmeantime.
On 2/15/2026 4:02 PM, legg wrote:
I've just replaced a front wheel inner tube.
Replacement tube was bought on-site on the day (long story)
Looks/feels like a 'flat' spot on the finished repair, with
no sign of rim damage.
It's a panaracer pasela PC 700x28C - a 'whitewall'.
The 'wall' looks visibly shorter in the 'flat' region, which
extends along a length corresponding to where the logo is
impressed on one side of the tire. Wall depth shortening is
more easily seen on the corresponding unmarked opposite wall.
Didn't notice it before the tube was replaced. Am I just
being oversensitive/ overcritical? It feels like I'm riding
on road surface that was ineptly rolled.
> 2yrs of use since tire installed without tube trouble in
meantime.
No amount of low-pressure massage or manipulation seems to
get rid of it.
Any suggestions?
RL
Yes.
Spin the wheel and observe on both sides a raised molded
line just above the brake track. It should be visible and
roughly concentric all around. If that line disappears at
some point(s), deflate your tire immediately and remount it.
When a tire is uneven on the rim such that one part is low,
that is, not entirely on the rim's seating lip, some other
portion of the tire can (and they often do!) go sailing over
the top of the rim.
OTOH, if that molded line is uniform and visible all around
it may well be that the colored portion of your sidewall is
merely applied unevenly. Unaesthetic maybe but doesn't
affect tire performance.
Regarding 'low pressure manipulation', a short schpritz of
spray wax inside the rim before mounting helps seating
immensely and we use it here routinely. Not unlike the
soapy water used for auto/motorcycle tire seating , just
less messy. To pull up a low spot, air to about 3/4
pressure and push hard while leaning the rim on a bench or
similar. Tire/rim combinations s which are hard to seat need
some pressure to lift the tire into place.
video:
https://www.youtube.com/watch?v=sIfiFUSM7Ro
Action starts at 3 minutes and although we prefer a
different style tool, the problem and solution are shown.
On Sun, 15 Feb 2026 16:41:20 -0600, AMuzi <am@yellowjersey.org> wrote:
On 2/15/2026 4:02 PM, legg wrote:
I've just replaced a front wheel inner tube.
Replacement tube was bought on-site on the day (long story)
Looks/feels like a 'flat' spot on the finished repair, with
no sign of rim damage.
It's a panaracer pasela PC 700x28C - a 'whitewall'.
The 'wall' looks visibly shorter in the 'flat' region, which
extends along a length corresponding to where the logo is
impressed on one side of the tire. Wall depth shortening is
more easily seen on the corresponding unmarked opposite wall.
Didn't notice it before the tube was replaced. Am I just
being oversensitive/ overcritical? It feels like I'm riding
on road surface that was ineptly rolled.
> 2yrs of use since tire installed without tube trouble in
meantime.
No amount of low-pressure massage or manipulation seems to
get rid of it.
Any suggestions?
RL
Yes.
Spin the wheel and observe on both sides a raised molded
line just above the brake track. It should be visible and
roughly concentric all around. If that line disappears at
some point(s), deflate your tire immediately and remount it.
When a tire is uneven on the rim such that one part is low,
that is, not entirely on the rim's seating lip, some other
portion of the tire can (and they often do!) go sailing over
the top of the rim.
OTOH, if that molded line is uniform and visible all around
it may well be that the colored portion of your sidewall is
merely applied unevenly. Unaesthetic maybe but doesn't
affect tire performance.
Regarding 'low pressure manipulation', a short schpritz of
spray wax inside the rim before mounting helps seating
immensely and we use it here routinely. Not unlike the
soapy water used for auto/motorcycle tire seating , just
less messy. To pull up a low spot, air to about 3/4
pressure and push hard while leaning the rim on a bench or
similar. Tire/rim combinations s which are hard to seat need
some pressure to lift the tire into place.
video:
https://www.youtube.com/watch?v=sIfiFUSM7Ro
Action starts at 3 minutes and although we prefer a
different style tool, the problem and solution are shown.
I disassembled it and cleaned the rim, trimmed loose stuff on the
tire. Applied a hint of teflon lube to the inner ridge without
much success.
The best that physical manipulation seems to get is a reduced
double dip.
The original issue showed a 2.7mm difference in wall hight on
both sides.
That'a down to about 1.2mm in both dips - 4 places.
Maybe when warmer weather gets here it'll pop back into position.
RL
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