Bizzare Tire Wear - Page 3 - Cycling Mob: Road Cycling, Mountain Biking and More

02-17-2004, 04:45 AM

Rick Onanian <[Only registered and activated users can see links. ]> wrote in message news:<[Only registered and activated users can see links. ]>. ..
> On 16 Feb 2004 04:31:42 -0800, [Only registered and activated users can see links. ] (Tony) wrote:
> >It is multiple diagonal lines that run almost the entire sidewall.
> >They are spaced less than an inch apart and it just looks like it is
> >wearing out. I thought at first it must be rubbing but I can't see
> >anywhere that the tire doesn't clear the frame and the brake pads
> >aren't far enough out to cause it. It is not abrasion from rocks or
> >whatever because I am riding only on the sidewalks and roads, and only
> >very occasionaly these aren't cleared of snow. Is it the cold?
> >Haven't had any problems with the front tire though, still has the
> >Hutchinson on it and no problems.
> >
> >Any Ideas?
>
> Are you keeping it inflated well, near or at it's maximum rated
> pressure? Do you weigh a lot?
>
> Sounds like what would happen to a terribly underinflated tire if
> you rode on it for too long and were lucky enough not to have to
> replace the tube daily.
>
> Maybe terribly beat up bearings would allow the wheel to rub the
> frame when weight is on it, but not when you spin it by hand. Try
> looking down while you ride.

actually, one of my friend was riding his mountainbike always with
highly _overinflated_ tires (like 6 bars instead of 4 as in its specs)
when he was riding on paved roads. His tires started to produce such
lines on the sides (the pattern of the threads that form the base of
rubber compound) after a month or two. i believe underinflated tires
would have other, more eye-catching symptoms like excessive wear of
the tread.

but the problem definitely has to do something with inflation.

one hint: if you're inflating your tires at gas stations, beware that
usually gas station pressure meters are not at all correct! the
biggest difference I measured was 8 bar (shown at the gas station) vs
5 bar measured with a trusty piece of equipment.

Frank
[Only registered and activated users can see links. ]

02-17-2004, 04:45 AM

Rick Onanian <[Only registered and activated users can see links. ]> wrote in message news:<[Only registered and activated users can see links. ]>. ..
> On 16 Feb 2004 04:31:42 -0800, [Only registered and activated users can see links. ] (Tony) wrote:
> >It is multiple diagonal lines that run almost the entire sidewall.
> >They are spaced less than an inch apart and it just looks like it is
> >wearing out. I thought at first it must be rubbing but I can't see
> >anywhere that the tire doesn't clear the frame and the brake pads
> >aren't far enough out to cause it. It is not abrasion from rocks or
> >whatever because I am riding only on the sidewalks and roads, and only
> >very occasionaly these aren't cleared of snow. Is it the cold?
> >Haven't had any problems with the front tire though, still has the
> >Hutchinson on it and no problems.
> >
> >Any Ideas?
>
> Are you keeping it inflated well, near or at it's maximum rated
> pressure? Do you weigh a lot?
>
> Sounds like what would happen to a terribly underinflated tire if
> you rode on it for too long and were lucky enough not to have to
> replace the tube daily.
>
> Maybe terribly beat up bearings would allow the wheel to rub the
> frame when weight is on it, but not when you spin it by hand. Try
> looking down while you ride.

actually, one of my friend was riding his mountainbike always with
highly _overinflated_ tires (like 6 bars instead of 4 as in its specs)
when he was riding on paved roads. His tires started to produce such
lines on the sides (the pattern of the threads that form the base of
rubber compound) after a month or two. i believe underinflated tires
would have other, more eye-catching symptoms like excessive wear of
the tread.

but the problem definitely has to do something with inflation.

one hint: if you're inflating your tires at gas stations, beware that
usually gas station pressure meters are not at all correct! the
biggest difference I measured was 8 bar (shown at the gas station) vs
5 bar measured with a trusty piece of equipment.

Frank
[Only registered and activated users can see links. ]