Does slippery rim tape increase or decrease rolling resistance?

Does slippery rim tape (or electrical tape, for that matter), increase
or decrease rolling resistance? Why?

cheers, J

On Tue, 29 Mar 2005 20:04:17 -0800, "Jens Kurt HEYCKE" jkheycke @at@
yahoo.com wrote:

Does slippery rim tape (or electrical tape, for that matter), increase
or decrease rolling resistance?

No.

Why?

There is no significant flexure of anything at that interface, and
there had damned well better not be any slippage of anything when the
tube is inflated.
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Jens Kurt HEYCKE wrote:
Does slippery rim tape (or electrical tape, for that matter), increase
or decrease rolling resistance? Why?

Increases it by .0023%.

Why? Because the air molecules inside the tire move around just a tad more,
which adds a smidge of draggage as the tread is displaced ever so slightly
(mostly sideways, but also radially).

You can remedy this by stretching a number of tacky rubber bands around the
slippy rim strip; or even more simply, by pouring some soda or hot soup in
the tire and sloshing (noodling?) it around.

HTH,

BS (OK, in this case...yeah)

"S o r n i" wrote:

Increases it by .0023%.

You are wrong...the number is much bigger. It is 0.0230007%

smokva wrote:

"S o r n i" wrote:

Increases it by .0023%.

You are wrong...the number is much bigger. It is 0.0230007%

Ahhhh, but at what altitude?

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

On Wed, 30 Mar 2005 06:36:05 -0700, Mark Hickey
may have said:

smokva wrote:

"S o r n i" wrote:

Increases it by .0023%.

You are wrong...the number is much bigger. It is 0.0230007%

Ahhhh, but at what altitude?

The color of the tire must also be taken into account. Blue tires
cause more doppler drag than red.

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On Wed, 30 Mar 2005 16:57:02 GMT, Retroed Bob
wrote:

On Wed, 30 Mar 2005 08:59:55 -0600, Werehatrack
wrote:

The color of the tire must also be taken into account. Blue tires
cause more doppler drag than red.


Whoa. Let's back up. He also said "by pouring some soda or hot soup
in the tire and sloshing (noodling?) it around."

I would suggest there is a big difference in adhesion using the soda
vs. the soup. Coke may actually be sticker when dried than rim tape.

Coke won't dry inside the tire. OTOH, the starches in the noodles
might polymerize and cause the apparent viscosity to increase. Also,
fermentation byproducts may cause the tire's pressure to rise; I doubt
that Coke will ferment in that situation.

None of this, however, addresses the issue of the increased rotating
mass and its effect on the balance of power in the Balkans.
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Not just altitude, you must also take into account air temp and
humidity or dew point temperature.