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46 TREK ASSEMBLY MANUAL 27 April 2012
Special Assembly
Tubular Tires
These instructions are for installing a new tire onto a new rim. Before mounting a tire,
make sure that the tire is the correct size for the wheel on which it is to be mounted.
Use only rim cement that is specically marked for gluing tubular tires.
To prepare the tubular rim
1. Remove the tire from the rim and set it aside.
2. Place the wheel in the truing stand.
3. Put on the protective gloves.
4. Starting at the rim’s valve hole, lightly sand the surface of the entire tire bed with
120 grit. Sanding removes remaining mold release and leave a texture for the glue
to grip.
5. Apply a small amount of acetone to a clean rag (Figure 86).
6. Starting again at the rim’s valve hole, wipe the sanded area of the rim. This cleans
the rim so that it is ready for glue.
To apply the rst layer of glue
Follow the glue manufacturer’s installation instructions for using their glue, especially
suggested drying times. The rst layer of glue on the rim must be very thin and
allowed to dry fully (usually around 24 hours). This rst layer is the foundation of the
correct attachment of a tubular tire.
1. Place the wheel in the truing stand.
2. Put on the protective gloves.
3. With the acid brush, apply a thin layer of glue to the rim’s tire bed, edge to edge,
all the way around the rim (Figure 87).
4. Inflate the tire just until it rolls over and the base tape is exposed (Figure 87).
5. Apply a thin layer of glue to the base tape.
6. Allow the glue to completely dry.
To apply the second layer of glue
1. If it is not already there, place the wheel back in the truing stand.
2. Put on the protective gloves.
3. With the acid brush, apply a second think layer of glue to the rim.
4. Inflate the tire just until it rolls over and the base tape is exposed.
5. Apply a thin layer of glue to the base tape.
6. Allow the glue to completely dry.
Figure 86. Sanding the rim and cleaning the base tape
Figure 87. Applying glue to the rim and base tape
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