page 41 • DENAGO
2. Tire Valves
There are primarily two kinds of Ebike tire valves: The Schrader Valve and the Presta Valve.
The Ebike pump you use must have the fitting appropriate to the valve stems on your Ebike.
The Schrader valve (FIG 20.A) is like the valve on a car tire. To inflate a Schrader valve tire,
remove the valve cap and clamp the pump fitting onto the end of the valve stem. To let air out
of a Schrader valve, depress the pin in the end of the valve stem with the end of a key or other
appropriate object.
The Presta valve (FIG 20.B) has a narrower diameter and is only found on Ebike tires.
To inflate a Presta valve tire using a Presta headed Ebike pump, remove the valve cap;
unscrew (counterclockwise) the valve stem lock nut; and push down on the valve stem to free it
up. Then push the pump head on to the valve head and inflate. To inflate a Presta valve with a
Schrader pump fitting, you’ll need a Presta adapter (available at your Ebike shop) which screws
on to the valve stem once you’ve freed up the valve. The adapter fits into the Schrader pump
fitting. Close the valve after inflation. To let air out of a Presta valve, open up the valve stem lock
nut and depress the valve stem.
FIG 20.A
FIG 20.B
WARNING: We highly recommend that you carry a spare inner tube when you ride
your Ebike, unless the Ebike is fitted with tubeless tires. Patching a tube is an emergency
repair. If you do not apply the patch correctly or apply several patches, the tube can fail,
resulting in possible tube failure, which could cause you to lose control and fall.
Replace a patched tube as soon as possible.
