We’ve had mixed results with many of the sealants we’ve tried. If
you’re not having luck with one, know that changing to a different
one could be all the difference.
Not all tubeless valves are created the same, even if they claim
to be “universal.” Some have rounded or conical shapes, while
others are more square. Choose one that fits nicely with the inner
profile of your rims, and if one doesn’t work, try another. We’ve
found the conical ones are typically the most reliable for the
widest range of rim shapes.
Most tire companies make some variety of tape to work with tubeless conversions. These are the best and most reliable solution for
converting non-tubeless rims to tubeless.
If a specially designed tubeless tape is not available, we know of
several riders who swear by Gorilla Tape, which is available at any
local hardware store. While it’s not specifically designed for the
purpose, it is durable and airtight enough to get the job done.
When converting a non-tubeless rim, start at the valve hole and
wrap the tape around the rim. Adding a single layer of tape is
usually sufficient. Adding more wraps of tape will make the tire
fit tighter and can help with the seating process later. Adding too
many layers of tape will make the tire too tight to mount. This is
a trial-and-error process.
Once you have the tape installed, it’s time to cut a hole for the
valve. We like to use a razor blade for this. Rather than carving the
entire circle out, we like to make an X with the blade,and then let
the extra bits of tape be pushed through with the valve. Doing this
creates a tighter seal between the rim, tape and valve.