User Guide

Schraeder and Presta Valves
There are two styles of valves used on Fisher bicycles (Fig. 75). The
larger diameter Schraeder valve is similar to those found on cars and
it’s use is the same. Just remove the valve cap, attach an air pump with
a Schraeder fitting, and inflate. Put the cap back on, as the cap keeps
dirt and debris out of the valve.
The Presta valve is also known as a French valve. To inflate a Presta
valve, remove the valve cap, if present. Presta valves seal very tightly,
and require a lot of pressure to open them initially, so after unscrewing
the valve nut, depress the nut with your finger to open the valve (This
should let a little air out). Inflate using a Presta valve fitting. After
inflation, tighten the valve nut against the valve stem until finger-tight.
This provides the same function as the valve cap on a Schraeder valve.
47
6. Inflate the tube until it begins to take shape. Place the tube in the tire. Insert
the tube valve stem through the hole in the rim and carefully mount the tire onto
the rim using your hands. Be careful not to pinch the tube between the rim and the
tire when mounting the tire.
7. Inflate the tire to about half pressure while checking that the tire bead is
properly seated in the rim. Deflate the tire again. This will help avoid any pinching
of the tube.
8. Inflate the tire to the pressure indicated on the side of the tire. Place the
wheel back in the frame making sure that the axle is inserted all the way into the
fork tips.
Note: For the rear wheel on derailleur bikes, place the chain on the smallest cog when installing
the wheel. For rear wheel on bikes without a derailleur, slide the wheel fully forward and place
the chain over the cog.
9. Re-install and adjust the quick release or tighten the axle nuts as shown in
the Wheels section.
For single speed bikes, retension the chain (with the chain tensioners, if so equipped).
Also readjust training wheels and reinstall the coaster brake arm strap, if so equipped.
Center the wheel in the frame, and gradually tighten the axle nuts on alternating sides of
the hub. Tighten the brake strap bolt.
To install the brake cable on a Nexus rear hub, slide the brake cable housing stop into
the slot on the brake arm. Pull the cable back and press the cable carrier arm forward
until the cable clamp bolt can be inserted though the large diameter hole. Slide the bolt
forward into the smaller diameter hole and make sure it is properly engaged so that it
cannot come out.
To install the shift cable on Shimano Nexus rear hubs, align the washer flats of the shift
cable fixing bolt (Fig. 74) with the slit in the cog joint bracket, and with the cable towards
the center of the hub, slide in the bolt. Wrap the cable counterclockwise around the
cog joint bracket, lay the cable in the fork, and pull the housing until there is enough
slack to install the housing into the housing stop. Check that the gear cable tension is
correctly adjusted.
10. For bikes with rim brakes, re-install the brake link-wire or re-install the brake
pipe into the link arm.
11. Test the brake to make sure it is properly adjusted.
12. Spin the wheel to see that it is centered and the wheel turns freely without
rubbing.
Fig. 75
Schraeder
Presta
THREE
Inspection,
Adjustment
&
Lubrication