SRAM WHEELS S27 COMP, User Manual, Page: 3 / 75

English SRAM Wheels User Manual
© SRAM, LLC • 2010 3
pARTS pRepARATion
inSTAll VAlVe eXTenSionS
Your carbon wheels (S40, S60, or S80) are supplied with valve extensions matched to the depth of the
rim.
Valve extenders are available in three different lengths:
• 33 mm for S40 wheels
• 48 mm for S60 wheels
• 74 mm for S80 wheels
Install valve extensions before mounting tires.
Remove the plastic Presta valve cap and metal lockring. Fully unscrew the valve locknut. 1.
Starting at the end of the valve, wrap plumber’s tape (PTFE tape) clockwise around the end of the 2.
valve so that the tape extends over both the narrow valve cap threads and the wider valve body.
Make sure that the tape does not stretch over the air opening at the end of the valve.
P lumber’s tape comes in several thicknesses. If thinner tape is used, more than one layer may be
needed to seal the valve properly.
Using a 3 mm hex wrench inserted into the valve extension, thread the valve extension onto the end 3.
of the valve and tighten.
Plumber’s tape should be replaced each time the valve extension is removed.
inSTAllinG RiM TApe
You must use a thin plastic or thin fabric rim strip for proper performance. We recommend using our own
SRAM rim tape: a durable, yet thin, woven tape, specifically designed to work with our rims. Do not use
Velox
©
or a similarly thick cloth rim strip.
4. Align the valve hole in the rim strip with the valve hole in the wheel rim.
5. Stretch the rim strip around the rim. Make sure the rim strip is centered on the tire bed all the way
around the rim.
Make sure all of the spoke holes are fully covered by the rim strip. Double check that the rim
strip valve hole is still aligned with the valve hole in the rim.
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