Very high tyre pressures

Some tyres when constantly overinflated eventually bubble, or a fat
portion appears giving a bumpy ride. You might be lucky though.

Claude wrote:

Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often. Of
course it makes the ride harder. Does anybody know if there's a serious
downside to this practice (I weigh 100 kgs)?

On Sat, 23 Aug 2003 05:41:46 +0000, Claude wrote:

Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often. Of
course it makes the ride harder. Does anybody know if there's a serious
downside to this practice (I weigh 100 kgs)?

Hey, just get some tyres rated to the pressure
you want to inflate them too. It's not worth
splitting your wig on the concrete for the
sake of correct inflation. While a catastrophic
failure is probably (?) unlikely, why take the risk ?

-kt

On Sat, 23 Aug 2003 05:41:46 +0000, Claude wrote:

Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often. Of
course it makes the ride harder. Does anybody know if there's a serious
downside to this practice (I weigh 100 kgs)?

Hey, just get some tyres rated to the pressure
you want to inflate them too. It's not worth
splitting your wig on the concrete for the
sake of correct inflation. While a catastrophic
failure is probably (?) unlikely, why take the risk ?

-kt

"John Dwyer" wrote in message ...
"Claude" wrote in message
...
Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often.
Of
course it makes the ride harder. Does anybody know if there's a serious
downside to this practice (I weigh 100 kgs)?

I once destroyed a tyre by overinflating it. The threads under the tread
started to break up and it gave a very rough ride. I do not recommend
overinflating a tyre.

John Dwyer.

Over inflating your tyres can cause your rims to split. Fairly common
apparently on large volume tyres that are over pressurised.

"John Dwyer" wrote in message ...
"Claude" wrote in message
...
Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often.
Of
course it makes the ride harder. Does anybody know if there's a serious
downside to this practice (I weigh 100 kgs)?

I once destroyed a tyre by overinflating it. The threads under the tread
started to break up and it gave a very rough ride. I do not recommend
overinflating a tyre.

John Dwyer.

Over inflating your tyres can cause your rims to split. Fairly common
apparently on large volume tyres that are over pressurised.

http://www.sheldonbrown.com/tires.html#pressure

http://www.sheldonbrown.com/tires.html#pressure

Claude wrote:
Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often.
Of course it makes the ride harder. Does anybody know if there's a
serious downside to this practice (I weigh 100 kgs)?

I use Continental Super Touring 2000 which are rated at 85 psi max. I
inflate them to anything between 85 and 100. They have done 4000 km
now, and I can see very tiny cracks on the side walls of the rear tyre.
Not sure they are because of the tyre pressure, or just signs of
natural wear and tear. However, I cannot feel the difference in terms
of the ride quality and drag between 85 and 95 psi. Before these, I had
Specialised tyres rated at 100 psi. First I kep them at 80 psi. Not
much comfort anyway, so I decided to pump them up to 100 psi. After
2000 km, I had to replace them under warranty because all thread and
sidwall surfaces were falling apart (got Conti's instead). The conti's
have much better ride quality and lower drag at 85 than the
Specialised's at 100 psi.

By the way, depending on the structure of the tyre, overinflation can
harm rims. I had to replace two spokes with my specialed tyres once I
started to inflate them to 100psi.






--
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Claude wrote:
Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often.
Of course it makes the ride harder. Does anybody know if there's a
serious downside to this practice (I weigh 100 kgs)?

I use Continental Super Touring 2000 which are rated at 85 psi max. I
inflate them to anything between 85 and 100. They have done 4000 km
now, and I can see very tiny cracks on the side walls of the rear tyre.
Not sure they are because of the tyre pressure, or just signs of
natural wear and tear. However, I cannot feel the difference in terms
of the ride quality and drag between 85 and 95 psi. Before these, I had
Specialised tyres rated at 100 psi. First I kep them at 80 psi. Not
much comfort anyway, so I decided to pump them up to 100 psi. After
2000 km, I had to replace them under warranty because all thread and
sidwall surfaces were falling apart (got Conti's instead). The conti's
have much better ride quality and lower drag at 85 than the
Specialised's at 100 psi.

By the way, depending on the structure of the tyre, overinflation can
harm rims. I had to replace two spokes with my specialed tyres once I
started to inflate them to 100psi.






--
--------------------------
Posted via cyclingforums.com
http://www.cyclingforums.com

amirm wrote in message
...
Claude wrote:
Putting 100 PSI in my hybrid's tyres even though the tyre says 75 is
recommended. Means I don't have to pump the bloody things up so often.
Of course it makes the ride harder. Does anybody know if there's a
serious downside to this practice (I weigh 100 kgs)?

I use Continental Super Touring 2000 which are rated at 85 psi max. I
inflate them to anything between 85 and 100. They have done 4000 km
now, and I can see very tiny cracks on the side walls of the rear tyre.
Not sure they are because of the tyre pressure, or just signs of
natural wear and tear. However, I cannot feel the difference in terms
of the ride quality and drag between 85 and 95 psi. Before these, I had
Specialised tyres rated at 100 psi. First I kep them at 80 psi. Not
much comfort anyway, so I decided to pump them up to 100 psi. After
2000 km, I had to replace them under warranty because all thread and
sidwall surfaces were falling apart (got Conti's instead). The conti's
have much better ride quality and lower drag at 85 than the
Specialised's at 100 psi.

By the way, depending on the structure of the tyre, overinflation can
harm rims. I had to replace two spokes with my specialed tyres once I
started to inflate them to 100psi.

That's probably related to the increase in shock that is transfered to the
spokes. I imagine the cracks that are occuring are also cause by an
increased transferral of shock to the rim from the road.

Why did you over-inflated your tires to 95 psi if it makes no difference to
the ride?
---
DFM