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Subject: 8b.10   Rim Tape Summary
From: Ron Larson <lars@craycos.com>

This is a summary of the experience of riders on the net regarding
various rim tapes, both commercial and improvized. Any additional
comments and inputs are welcome.

RIM TAPE

Rim tape or rim strips are the material that is placed inside a
clincher rim to protect the tube from sharp edges of the nipple holes
and possibly exposed ends of spokes extending beyond the nipples. Many
materials have been used to produce rim tapes: plastic, rubber, tapes
consisting of a multi-directional fiber weave, duct tape and fiberglass
packing tape.

A few factors influence how well a rim tape works. Some of the tapes
are available in more than one width. It is important to choose the
width that provides the best fit to cover the entire "floor" of the rim
as opposed to a tape that is barely wide enough to cover the nipple
holes. Another factor is how well the rim tape withstands the stress of
being stretched over the nipple holes with a high preassure inner tube
applying preassure to it. The main form of failure of the plastic tapes
is for the tape to split lengthwise (in the direction the tube lies in
the rim) under high preassure forming a sharp edge that the tube
squeezes through and then rubs against. Thus the splitting tape causes
the flat that it was supposed to be protecting against.

REVIEW OF RIM TAPES BY TYPE

Plastic Tapes

Advantages:

Easy to install and remove. No sticky side is involved.

Disadvantages:

Although there are exceptions, they are prone to splitting under
preassure.

Michelin                      Good Experiences: 0  Bad Experiences: 6

Cool Tape                     Good Experiences: 2  Bad Experiences: 0

  Cool Tape is thicker than other plastic tapes and does not exhibit
  the splitting failure noted above.

Hutchinson                    Good Experiences: 0  Bad Experiences: 2

Specialized                   Good Experiences: 1  Bad Experiences: 4

Rubber Tapes

Advantages:

Easy to install and remove. Good if the nipples are even with the rim
floor and there are no exposed spoke ends.

Disadvantages:

Stretch too easily and allow exposed nipple ends to rub through the
tape and then through the tape.

Rubber strips                 Good Experiences: 0  Bad Experiences: 2

Cloth tapes woven of multi-directional fibers:

Advantages:

Easy to install. Do not fail under preassure.

Disadvantages:

They are a sticky tape and care must be taken not to pick up dirt if
they need to be removed and re-installed.

Velox                         Good Experiences:11  Bad Experiences: 0

  Velox rim tape comes in three different widths. Be sure to get the
  widest tape that covers the floor of the rim without extending up the
  walls of the rim.  The stem hole may need to be enlarged to allow the
  stem to seat properly. Otherwise the stem may push back into the tube
  under preassure and cause a puncture at the base of the stem.

Non-commercial rim tapes

Fiberglass packing tape (1 or 2 layers)

Advantages:

Cheap. Readily available. Easy to install.

Disadvantages:

Impossible to remove. If access to the nipples is required, the tape
must be split and then either removed and replaced or taped over.

Fiberglass packing tape       Good Experiences: 1  Bad Experiences: 1

Duct tape (hey, someone tried it!!)

Advantages:

CHEAP. Readily available.

Disadvantages:

Useless. Becomes a gooey mess that is impossible to remove.

Duct tape                     Good Experiences: 0  Bad Experiences: 1

CONCLUSION

While plastic tapes are easy to work with, they often fail. The clear
winner in this survey is the Velox woven cloth tape. A quick review of
mail order catalogs confirms the experiences of the net. Velox was
available in 5 out of 5 catalogs checked.  It was the only rim tape
available in 3 of the catalogs. The other 2 had one or two plastic
tapes available. (None sold duct tape...)

One good suggestion was a preassure rating for rim tapes much like the
preassure rating of tires.

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