have you ever run a tire over pressure?

johnson.. said:

I have a bmx tire on the rear of my tailwind. A large tire at 1.95 it is a
dura x-performer 50-406. The psi reading is 75 but I have it pumped to 90.
On a scale of 1 to 10, 1 being completely safe and 10 being suicidal, how
would you rate what I am doing?

1.1

If you're worried, pump it up another 50 or 60 (with earplugs in, if
you like) and leave it overnight.

On my unicycles I routinely run tyres at about twice what teh
side-wall says (for road riding, anyway). Side-wall figures rarely
have any really good basis for them, since the blow-off pressure is so
dependant on things like teh goodness of fit and profile of teh rim.

On teh other hand, I did once pump up an inner tube 'till it burst.
It reached a remarkable size, and made a remarkable bang. My ears
were ringing for some time, but that wasn't hepled by teh fact that I
cleverly decide to do this in a garage.

regards, Ian SMith
--
|\ /| no .sig
|o o|
|/ \|

"johnson.." <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I have a bmx tire on the rear of my tailwind. A large tire at 1.95 it is a
dura x-performer 50-406. The psi reading is 75 but I have it pumped to 90.
On a scale of 1 to 10, 1 being completely safe and 10 being suicidal, how
would you rate what I am doing?

People here have been recommending I overinflate my tires by about 10psi for
as long as I have been biking for additional speed. Haven't died yet.

"johnson.." <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

I have a bmx tire on the rear of my tailwind. A large tire at 1.95 it is a
dura x-performer 50-406. The psi reading is 75 but I have it pumped to 90.
On a scale of 1 to 10, 1 being completely safe and 10 being suicidal, how
would you rate what I am doing?

Since this is on-topic and not corrupted as of yet, here goes:

I'd rate this a 2. But running under-inflated would probably be less
safe. I ran dirt tires on my 20" rims on a RANS and always
over-inflated them and I'm still here.

Ken

Ian Smith <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

johnson.. said:

I have a bmx tire on the rear of my tailwind. A large tire at 1.95 it is a
dura x-performer 50-406. The psi reading is 75 but I have it pumped to 90.
On a scale of 1 to 10, 1 being completely safe and 10 being suicidal, how
would you rate what I am doing?

1.1

If you're worried, pump it up another 50 or 60 (with earplugs in, if
you like) and leave it overnight.

On my unicycles I routinely run tyres at about twice what teh
side-wall says (for road riding, anyway). Side-wall figures rarely
have any really good basis for them, since the blow-off pressure is so
dependant on things like teh goodness of fit and profile of teh rim.

I recall Zach kaplan experimenting with this. He pumped a 100 psi tire
up to something like 240 psi before the rim broke. IIRC, pressure
ratings are generally 1/2 of their average burst pressure.

I find that much over 110 psi gives me a lousy ride on anything but
very smooth pavement. This is on a Tour Easy with 28mm tires front &
rear.

Jeff

Quoted message said:

The psi reading is 75 but I have it pumped to 90.
On a scale of 1 to 10, 1 being completely safe and
10 being suicidal, how would you rate what I am doing?

I have run a tyre rated 80psi pumped to 100psi for extended periods over
rough roads in hot weather without incident.

--
Robots don't kill people -- people kill people.
http://www.irobotmovie.com/

"Ken" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"johnson.." <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

I have a bmx tire on the rear of my tailwind. A large tire at 1.95 it is

a

Quoted message said:

Quoted message said:

dura x-performer 50-406. The psi reading is 75 but I have it pumped to

90.

Quoted message said:

Quoted message said:

On a scale of 1 to 10, 1 being completely safe and 10 being suicidal,

how

Quoted message said:

Quoted message said:

would you rate what I am doing?

Since this is on-topic and not corrupted as of yet, here goes:

i hate when the corruption happens

Quoted message said:

I'd rate this a 2. But running under-inflated would probably be less
safe. I ran dirt tires on my 20" rims on a RANS and always
over-inflated them and I'm still here.

Ken

and before this topic degenerates into name calling I will thank everyone
past current and future for there advise.

"johnson.." <[email hidden]> wrote in message
news:[email hidden]...
[...]

Quoted message said:

and before this topic degenerates into name calling I will thank everyone
past current and future for there advise.

Ye old curmudgeon Ed Dolan does not interfere with posts that are on-topic.
I want this newsgroup to flourish above all else. After all, that is the
reason I am here too. But get off-topic on political subjects and I will be
here for you.

--
Regards,

Ed Dolan - Minnesota

[email hidden] (Jeff Wills) wrote in message news:<[email hidden]>...

Quoted message said:

Ian Smith <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

johnson.. said:

I have a bmx tire on the rear of my tailwind. A large tire at 1.95 it is a
dura x-performer 50-406. The psi reading is 75 but I have it pumped to 90.
On a scale of 1 to 10, 1 being completely safe and 10 being suicidal, how
would you rate what I am doing?

1.1

If you're worried, pump it up another 50 or 60 (with earplugs in, if
you like) and leave it overnight.

On my unicycles I routinely run tyres at about twice what teh
side-wall says (for road riding, anyway). Side-wall figures rarely
have any really good basis for them, since the blow-off pressure is so
dependant on things like teh goodness of fit and profile of teh rim.

I recall Zach kaplan experimenting with this. He pumped a 100 psi tire
up to something like 240 psi before the rim broke. IIRC, pressure
ratings are generally 1/2 of their average burst pressure.

I find that much over 110 psi gives me a lousy ride on anything but
very smooth pavement. This is on a Tour Easy with 28mm tires front &
rear.

Jeff

Actually it was a particularly tough looking 35 psi rated tyre I was
testing for tandem use at a time when there was very limited selection
of wide, high pressure rated tyres. It stayed on the rim at 180 psi at
which point the rim started deforming.

Zach Kaplan

"Edward Dolan" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"johnson.." <[email hidden]> wrote in message
news:[email hidden]...
[...]

Quoted message said:

and before this topic degenerates into name calling I will thank

everyone

Quoted message said:

Quoted message said:

past current and future for there advise.

Ye old curmudgeon Ed Dolan does not interfere with posts that are

on-topic.

Quoted message said:

I want this newsgroup to flourish above all else. After all, that is the
reason I am here too. But get off-topic on political subjects and I will

be

Quoted message said:

here for you.

--
Regards,

Ed Dolan - Minnesota

never fear, i hate politics.

[email hidden] (Zach Kaplan Cycles) wrote in message news:<[email hidden]>...
<snip>

Quoted message said:

Actually it was a particularly tough looking 35 psi rated tyre I was
testing for tandem use at a time when there was very limited selection
of wide, high pressure rated tyres. It stayed on the rim at 180 psi at
which point the rim started deforming.

Zach Kaplan

Eeeee!! *Five* times rated pressure? That's one tough tire!

With some of the freestyle tires rated at 120psi, do you want to
repeat the test? I'd recommend body armor...

Jeff