Joshua Nelson did pass the time by typing:
> Doing tire research, I looked back through the google archives. There
> is a lot of talk about Thornbirds being 2-ply, some tires being
> bias-ply, others being other kinds of "ply." I am not familiar with
> this term... could someone tell me briefly what it means?

A fly with a speach impediment.

:)

Number of layers in the sidewall.
The more plies the stiffer the tire.

--
DougW
ramjw resident wiseass.

 

Joshua Nelson did pass the time by typing:
> Doing tire research, I looked back through the google archives. There
> is a lot of talk about Thornbirds being 2-ply, some tires being
> bias-ply, others being other kinds of "ply." I am not familiar with
> this term... could someone tell me briefly what it means?

A fly with a speach impediment.

:)

Number of layers in the sidewall.
The more plies the stiffer the tire.

--
DougW
ramjw resident wiseass.

 

Joshua Nelson did pass the time by typing:
> Doing tire research, I looked back through the google archives. There
> is a lot of talk about Thornbirds being 2-ply, some tires being
> bias-ply, others being other kinds of "ply." I am not familiar with
> this term... could someone tell me briefly what it means?

A fly with a speach impediment.

:)

Number of layers in the sidewall.
The more plies the stiffer the tire.

--
DougW
ramjw resident wiseass.

 

and for the sake of completeness only, older tyres which have layers going
round the circumference were called crossplies.


Dave Milne, Scotland
'99 TJ 4.0 Sahara

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F83349D.F7B07C33@sympatico.ca...
: The 'plies' are the layers or belts that are inside the tires.
:
: A heavy duty truck tire can be 8 'ply' which means there are 8 different
: layers of belts in the sidewalls.
:
: A Thornbird you say only has 2 plies.
:
: The cheap BFG second line of mud tires, the Mud King's, only have 2
: sidewall plies, real BFG muds have 3 sidewall plies.
:
: This makes the sidewall much stronger and much more resistant to pinches
: or perforations. It also makes it less flexible under full air
: pressure.
:
: So a 2 ply tire will lean into turns and dive the front end down way
: more than a 3 ply sidewall or 8 ply one will do on the street.
:
: Some tires will also list X number of plies for the tread and X # of
: plies for the sidewall.
:
: Bias ply means the belts go sideways at something like 20-45 deg across
: the tire alternating zig zag front to back where radial plies go
: straight across in a 90 deg to the rim or in line with the tire
: 'radius'.
:
: Radial tires flex way more and couldn't work until technology improved
: back in the 70's I think it was.
:
: That is why bias ply tires should be rotated in a cross pattern, because
: the belts go both ways, so the best wear is had my making them turn the
: opposite way by flipping them side to side.
:
: A steel belted radial will 'break in' the belts in the rotation they
: were installed in and can and 'will' blow a belt if crossed in a
: rotation so they spin the opposite direction.
:
: 'Modern' radials are 'supposed' to be able to be cross rotated according
: to the tire makers, the same folks that want to sell you new ones
: remember, eh....
:
: Meanwhile, 'both' of my original Jeep owners manuals state point blank
: to only rotate the tires front to back with radials, if you want to
: rotate the spare in, it goes on the right rear, because the right rear
: is the highest wear tire. It is the default power wheel for a stock
: open diff. Dump the clutch and the right rear is always the one to
: spin. The right front goes to the spare, then back to the right rear on
: the next rotation. The left side only ever rotates front to back.
:
: That is the main reason I only have a used BFG AT as a spare for my BFG
: mud tires. As a spare, I am only going to use it to get to a place to
: fix my 'expensive' tire so I don't give a ---- what side it has to go on
: if I get a flat and it blows a belt as a spare. I can get another for
: the cost of mounting it.
:
: I just tossed 10 tires out of my garage, all with good tread and belts
: that had let go. I bought the tires used from the scrap yard cheap with
: the 50/50 factor if I could guess which way they were previously
: installed.
:
: I bought my Cherokee in 99 with 'modern' radial tires on it that were
: cross rotated, and one blew a belt out. They were Hercules 'Terra Trac'
: tires.
:
: Mike
: 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
: 88 Cherokee 235 BFG AT's
:
: Joshua Nelson wrote:
: >
: > Doing tire research, I looked back through the google archives. There
: > is a lot of talk about Thornbirds being 2-ply, some tires being
: > bias-ply, others being other kinds of "ply." I am not familiar with
: > this term... could someone tell me briefly what it means?

 

and for the sake of completeness only, older tyres which have layers going
round the circumference were called crossplies.


Dave Milne, Scotland
'99 TJ 4.0 Sahara

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F83349D.F7B07C33@sympatico.ca...
: The 'plies' are the layers or belts that are inside the tires.
:
: A heavy duty truck tire can be 8 'ply' which means there are 8 different
: layers of belts in the sidewalls.
:
: A Thornbird you say only has 2 plies.
:
: The cheap BFG second line of mud tires, the Mud King's, only have 2
: sidewall plies, real BFG muds have 3 sidewall plies.
:
: This makes the sidewall much stronger and much more resistant to pinches
: or perforations. It also makes it less flexible under full air
: pressure.
:
: So a 2 ply tire will lean into turns and dive the front end down way
: more than a 3 ply sidewall or 8 ply one will do on the street.
:
: Some tires will also list X number of plies for the tread and X # of
: plies for the sidewall.
:
: Bias ply means the belts go sideways at something like 20-45 deg across
: the tire alternating zig zag front to back where radial plies go
: straight across in a 90 deg to the rim or in line with the tire
: 'radius'.
:
: Radial tires flex way more and couldn't work until technology improved
: back in the 70's I think it was.
:
: That is why bias ply tires should be rotated in a cross pattern, because
: the belts go both ways, so the best wear is had my making them turn the
: opposite way by flipping them side to side.
:
: A steel belted radial will 'break in' the belts in the rotation they
: were installed in and can and 'will' blow a belt if crossed in a
: rotation so they spin the opposite direction.
:
: 'Modern' radials are 'supposed' to be able to be cross rotated according
: to the tire makers, the same folks that want to sell you new ones
: remember, eh....
:
: Meanwhile, 'both' of my original Jeep owners manuals state point blank
: to only rotate the tires front to back with radials, if you want to
: rotate the spare in, it goes on the right rear, because the right rear
: is the highest wear tire. It is the default power wheel for a stock
: open diff. Dump the clutch and the right rear is always the one to
: spin. The right front goes to the spare, then back to the right rear on
: the next rotation. The left side only ever rotates front to back.
:
: That is the main reason I only have a used BFG AT as a spare for my BFG
: mud tires. As a spare, I am only going to use it to get to a place to
: fix my 'expensive' tire so I don't give a ---- what side it has to go on
: if I get a flat and it blows a belt as a spare. I can get another for
: the cost of mounting it.
:
: I just tossed 10 tires out of my garage, all with good tread and belts
: that had let go. I bought the tires used from the scrap yard cheap with
: the 50/50 factor if I could guess which way they were previously
: installed.
:
: I bought my Cherokee in 99 with 'modern' radial tires on it that were
: cross rotated, and one blew a belt out. They were Hercules 'Terra Trac'
: tires.
:
: Mike
: 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
: 88 Cherokee 235 BFG AT's
:
: Joshua Nelson wrote:
: >
: > Doing tire research, I looked back through the google archives. There
: > is a lot of talk about Thornbirds being 2-ply, some tires being
: > bias-ply, others being other kinds of "ply." I am not familiar with
: > this term... could someone tell me briefly what it means?

 

and for the sake of completeness only, older tyres which have layers going
round the circumference were called crossplies.


Dave Milne, Scotland
'99 TJ 4.0 Sahara

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3F83349D.F7B07C33@sympatico.ca...
: The 'plies' are the layers or belts that are inside the tires.
:
: A heavy duty truck tire can be 8 'ply' which means there are 8 different
: layers of belts in the sidewalls.
:
: A Thornbird you say only has 2 plies.
:
: The cheap BFG second line of mud tires, the Mud King's, only have 2
: sidewall plies, real BFG muds have 3 sidewall plies.
:
: This makes the sidewall much stronger and much more resistant to pinches
: or perforations. It also makes it less flexible under full air
: pressure.
:
: So a 2 ply tire will lean into turns and dive the front end down way
: more than a 3 ply sidewall or 8 ply one will do on the street.
:
: Some tires will also list X number of plies for the tread and X # of
: plies for the sidewall.
:
: Bias ply means the belts go sideways at something like 20-45 deg across
: the tire alternating zig zag front to back where radial plies go
: straight across in a 90 deg to the rim or in line with the tire
: 'radius'.
:
: Radial tires flex way more and couldn't work until technology improved
: back in the 70's I think it was.
:
: That is why bias ply tires should be rotated in a cross pattern, because
: the belts go both ways, so the best wear is had my making them turn the
: opposite way by flipping them side to side.
:
: A steel belted radial will 'break in' the belts in the rotation they
: were installed in and can and 'will' blow a belt if crossed in a
: rotation so they spin the opposite direction.
:
: 'Modern' radials are 'supposed' to be able to be cross rotated according
: to the tire makers, the same folks that want to sell you new ones
: remember, eh....
:
: Meanwhile, 'both' of my original Jeep owners manuals state point blank
: to only rotate the tires front to back with radials, if you want to
: rotate the spare in, it goes on the right rear, because the right rear
: is the highest wear tire. It is the default power wheel for a stock
: open diff. Dump the clutch and the right rear is always the one to
: spin. The right front goes to the spare, then back to the right rear on
: the next rotation. The left side only ever rotates front to back.
:
: That is the main reason I only have a used BFG AT as a spare for my BFG
: mud tires. As a spare, I am only going to use it to get to a place to
: fix my 'expensive' tire so I don't give a ---- what side it has to go on
: if I get a flat and it blows a belt as a spare. I can get another for
: the cost of mounting it.
:
: I just tossed 10 tires out of my garage, all with good tread and belts
: that had let go. I bought the tires used from the scrap yard cheap with
: the 50/50 factor if I could guess which way they were previously
: installed.
:
: I bought my Cherokee in 99 with 'modern' radial tires on it that were
: cross rotated, and one blew a belt out. They were Hercules 'Terra Trac'
: tires.
:
: Mike
: 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
: 88 Cherokee 235 BFG AT's
:
: Joshua Nelson wrote:
: >
: > Doing tire research, I looked back through the google archives. There
: > is a lot of talk about Thornbirds being 2-ply, some tires being
: > bias-ply, others being other kinds of "ply." I am not familiar with
: > this term... could someone tell me briefly what it means?

 

Dave Milne did pass the time by typing:
> and for the sake of completeness only, older tyres which have layers going
> round the circumference were called crossplies.

I want a five ply chocolate cake please.

--
DougW

 

Dave Milne did pass the time by typing:
> and for the sake of completeness only, older tyres which have layers going
> round the circumference were called crossplies.

I want a five ply chocolate cake please.

--
DougW

 

Dave Milne did pass the time by typing:
> and for the sake of completeness only, older tyres which have layers going
> round the circumference were called crossplies.

I want a five ply chocolate cake please.

--
DougW

 

DougW wrote:
>
> Dave Milne did pass the time by typing:
> > and for the sake of completeness only, older tyres which have layers going
> > round the circumference were called crossplies.
>
> I want a five ply chocolate cake please.
>
> --

Mmmmmmmm.....

Mike