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New tires arrive! Lots of questions exist.



 
 
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  #1  
Old April 29th 05, 02:25 PM
dgk
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Default New tires arrive! Lots of questions exist.

Which way to mount them? It seems obvious. The center of the tread has
a sort of airplane pattern and I guess the airplane should point
forward. These are the tires (perfect max):

http://www.vredestein.com/Fietsbande...etsSoo rtID=2

Sheldon Brown says that tread doesn't matter at all and should be
slick but that unsophisticated buyers think that they would be
slippery and won't buy them. I'm not sure about the unsophisticated;
unenlightened (like me) would be a better way to put it. Until now,
that is.

I suspect that a better check than the airplane design would be that
the channels push water out. Let's see, tire is rolling forward, at
the contact point you want water pushed out to the side. Ok, if I
mount them so the airplane is pointing forward at the top, then it
points backwards at the contact point and the water is being pushed
forwards. Bad. Ok, looks like the reverse it true. Airplane points
back at the top and forward at the contact point?

Ok, do I rotate these tires every month or two, front to back? The
rear one wears out faster so that should keep them in sync.

Bike NY is Sunday. That will be the first real test of these tires if
I make the change today or tomorrow. But I won't have much of a chance
to try them out before then. Oh well, plenty of SAG vehicles if they
screw up somehow or I screw up mounting them.


Ads
  #2  
Old April 29th 05, 02:43 PM
dgk
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On Fri, 29 Apr 2005 09:25:40 -0400, dgk
wrote:

Which way to mount them? It seems obvious. The center of the tread has
a sort of airplane pattern and I guess the airplane should point
forward. These are the tires (perfect max):

http://www.vredestein.com/Fietsbande...etsSoo rtID=2

Sheldon Brown says that tread doesn't matter at all and should be
slick but that unsophisticated buyers think that they would be
slippery and won't buy them. I'm not sure about the unsophisticated;
unenlightened (like me) would be a better way to put it. Until now,
that is.

I suspect that a better check than the airplane design would be that
the channels push water out. Let's see, tire is rolling forward, at
the contact point you want water pushed out to the side. Ok, if I
mount them so the airplane is pointing forward at the top, then it
points backwards at the contact point and the water is being pushed
forwards. Bad. Ok, looks like the reverse it true. Airplane points
back at the top and forward at the contact point?

Ok, do I rotate these tires every month or two, front to back? The
rear one wears out faster so that should keep them in sync.

Bike NY is Sunday. That will be the first real test of these tires if
I make the change today or tomorrow. But I won't have much of a chance
to try them out before then. Oh well, plenty of SAG vehicles if they
screw up somehow or I screw up mounting them.


CORRECTION! I found the rotation arrow on the tire. I didn't see it
the first time because the reflective strip makes everything pretty
hard to read.
  #3  
Old April 29th 05, 04:15 PM
Rich Clark
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"dgk" wrote in message
...

Ok, do I rotate these tires every month or two, front to back? The
rear one wears out faster so that should keep them in sync.


That's a lot of work, and the most likely blowout is one caused by an error
while mounting the tire. Why increase that risk?

You want the good rubber on the front anyway, since a blowout in front is a
lot more likely to make you crash. Let the rear tire wear out, then move the
still-good front to the rear and put a new tire on the front.

RichC


  #4  
Old April 29th 05, 06:33 PM
bfd
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"Rich Clark" wrote in message
...

"dgk" wrote in message
...

Ok, do I rotate these tires every month or two, front to back? The
rear one wears out faster so that should keep them in sync.


Sheldon Brown has an excellent article on tire "rotation":

http://www.sheldonbrown.com/tire-rotation.html



  #5  
Old April 30th 05, 01:03 AM
X_HOBBES
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"dgk" wrote in message
...
Which way to mount them? It seems obvious. The center of the tread has
a sort of airplane pattern and I guess the airplane should point
forward. These are the tires (perfect max):


http://www.vredestein.com/Fietsbande...etsSoo rtID=2

Sheldon Brown says that tread doesn't matter at all and should be
slick but that unsophisticated buyers think that they would be
slippery and won't buy them. I'm not sure about the unsophisticated;
unenlightened (like me) would be a better way to put it. Until now,
that is.

I suspect that a better check than the airplane design would be that
the channels push water out. Let's see, tire is rolling forward, at
the contact point you want water pushed out to the side. Ok, if I
mount them so the airplane is pointing forward at the top, then it
points backwards at the contact point and the water is being pushed
forwards. Bad. Ok, looks like the reverse it true. Airplane points
back at the top and forward at the contact point?


In an airplane-shaped (or V-shaped) tire thread, you would want the center
of the V to touch the ground first so the remainder of the V can fan away
water. If you mount it so that the outside tips of the V touch the ground
first, then the two blades on the V will actually pull water towards the
center of the tire and cause lift (hydroplaning). But realistically, unless
you're going really fast and riding through a long stream of water, IT
REALLY WON'T MATTER MUCH. I suppose that the tip of the V facing forward at
the top of the tire may have a tiny little impact on airflow around the
tire. If tip of the V points backwards, then it acts a bit more like a
scoop or parachute, pulling air towards the middle instead of whisking it
away. But again, this is really insignificant.

Good luck on the NY ride. I gotta try that sometime!

X_HOBBES


  #6  
Old April 30th 05, 01:19 AM
dgk
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Default

On Fri, 29 Apr 2005 20:03:15 -0400, "X_HOBBES"
wrote:

"dgk" wrote in message
.. .
Which way to mount them? It seems obvious. The center of the tread has
a sort of airplane pattern and I guess the airplane should point
forward. These are the tires (perfect max):


http://www.vredestein.com/Fietsbande...etsSoo rtID=2

Sheldon Brown says that tread doesn't matter at all and should be
slick but that unsophisticated buyers think that they would be
slippery and won't buy them. I'm not sure about the unsophisticated;
unenlightened (like me) would be a better way to put it. Until now,
that is.

I suspect that a better check than the airplane design would be that
the channels push water out. Let's see, tire is rolling forward, at
the contact point you want water pushed out to the side. Ok, if I
mount them so the airplane is pointing forward at the top, then it
points backwards at the contact point and the water is being pushed
forwards. Bad. Ok, looks like the reverse it true. Airplane points
back at the top and forward at the contact point?


In an airplane-shaped (or V-shaped) tire thread, you would want the center
of the V to touch the ground first so the remainder of the V can fan away
water. If you mount it so that the outside tips of the V touch the ground
first, then the two blades on the V will actually pull water towards the
center of the tire and cause lift (hydroplaning). But realistically, unless
you're going really fast and riding through a long stream of water, IT
REALLY WON'T MATTER MUCH. I suppose that the tip of the V facing forward at
the top of the tire may have a tiny little impact on airflow around the
tire. If tip of the V points backwards, then it acts a bit more like a
scoop or parachute, pulling air towards the middle instead of whisking it
away. But again, this is really insignificant.

Good luck on the NY ride. I gotta try that sometime!

X_HOBBES


Thanks, I've done BikeNY for maybe the last five years. Very much fun.

Well, I've mounted the new tires and new tubes. Those are VERY tight
tires. It's good that they claim to be just about puncture proof
because they are no fun to change. I'll ride around a bit tomorrow
just to make sure that there are no leaks and them I'm set for Sunday.
  #7  
Old April 30th 05, 04:53 PM
Peter Cole
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X_HOBBES wrote:

In an airplane-shaped (or V-shaped) tire thread, you would want the center
of the V to touch the ground first so the remainder of the V can fan away
water. If you mount it so that the outside tips of the V touch the ground
first, then the two blades on the V will actually pull water towards the
center of the tire and cause lift (hydroplaning). But realistically, unless
you're going really fast and riding through a long stream of water, IT
REALLY WON'T MATTER MUCH.


It won't matter at all, bike tires don't hydroplane.
  #8  
Old April 30th 05, 04:59 PM
bfd
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Posts: n/a
Default


"Peter Cole" wrote in message
...
X_HOBBES wrote:

In an airplane-shaped (or V-shaped) tire thread, you would want the
center
of the V to touch the ground first so the remainder of the V can fan away
water. If you mount it so that the outside tips of the V touch the
ground
first, then the two blades on the V will actually pull water towards the
center of the tire and cause lift (hydroplaning). But realistically,
unless
you're going really fast and riding through a long stream of water, IT
REALLY WON'T MATTER MUCH.


It won't matter at all, bike tires don't hydroplane.


Agree, he ought to read the Bicycle FAQ, hosted by Sheldon Brown:

http://www.sheldonbrown.com/brandt/slicks.html


 




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