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This Procedure includes the following:
Seat-To-Floor Height Determination
Changing Seat-To-Floor Height
Axle Mounting Plate Positions for 20, 22 or
24-inch Rear Wheels
Inline Caster Headtube Front Seat-to-Floor
Heights
Offset Caster Headtube Front Seat-to-Floor
Heights
WARNING
The seat height, seat depth, back angle, seating sys-
tem, size and position of the rear wheels, as well as
the user condition directly relate to the stability of
the wheelchair. Any change to one (1) or any com-
bination of the seven (7) may cause the wheelchair
to decrease in stability. These adjustments MUST
be performed by an authorized dealer or qualified
technician.
After adjustments and before use make sure all at-
taching hardware is securely tightened.
PROCEDURE 9SEAT-TO-FLOOR
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SEAT-TO-FLOOR HEIGHT DETERMINATION
Rear Seat-to-floor Height (FIGURE 1)
Rear seat-to-floor height is determined by measuring the
distance between the rear of the seat upholstery and the
ground/floor.
NOTE: The rear seat-to-floor heights are based on
pneumatic tires and pneumatic tires with flat free in-
serts. If wheelchair is equipped with urethane tires,
subtract 1/4-inch from the measurements listed on
the following pages. All heights are approximate to
+1/4-inch due to tire wear and air pressure.
NOTE: For Folding and Rigid Frames w/o seat rails,
subtract 1-3/4-inches from S-T-F listed below. This
will give distance from top of side frame to floor.
Rear
Seat-to-Floor
FIGURE 1 - REAR SEAT-TO-FLOOR HEIGHT
DETERMINATION
Front Seat-to Floor Height (FIGURE 2)
NOTE: The front seat-to-floor heights are ap-
proximate to
+1/4-inch.
Front seat-to-floor height is determined by measur-
ing the distance between the front of the seat up-
holstery and the ground/floor.
NOTE: For Folding and Rigid Frames w/o seat rails,
subtract 1-3/4-inches from S-T-F listed below. This
will give distance from top of side frame to floor.
FIGURE 2 - FRONT SEAT-TO-FLOOR HEIGHT
DETERMINATION
Front
Seat-to-Floor
Seat Dump
The rear seat-to-floor height measurement in com-
bination with the front seat-to-floor height mea-
surement determine the amount of seat dump the
wheelchair will have.
For Example:
An 18-1/4-inch front seat-to-floor height measurement
MINUS
a 17-inch rear seat-to-floor height measurement
EQUALS
1-1/4-inches of seat dump
NOTE: Invacare recommends that the rear seat-to-
floor height be AT LEAST 3/8-inch shorter than the
front seat-to-floor height. Otherwise a forward seat
dump can occur.