4
Chair Measurement References
The Tsunami and Little Wave wheelchairs are capable of many adjustments to configure the chair to the
user’s needs. See the diagram below for terms that are commonly used during the process of adjusting the
chairs.
K
F
G
E
A
B
H
D
J
I
A. Seat Width (see diagram 1)
Measured from outside of frame tube on one side to the
outside of frame tube on the other side.
B. Seat Depth (see diagram 3)
Measured from front of back posts to front edge of seat sling.
Seat sling starts at beginning of bend at front of frame.
C. Sling Position (see diagram 2)
In Performance Position (0”), sling is at front of frame to keep
chair shorter and more maneuverable. The 1” or 2” seat sling
position extends the frame in front of the sling by that amount.
Adding more frame can improve stability and provide support
to aid in transfers.
D. Front Frame Bend (see diagram 3)
Angle between front seat tube and ground.
E. Footrest Taper (see diagram 1)
Indicates bend of front frame creating footrest. Taper is
measured from outside of seat frame to outside of front tube.
F. Front Seat Height (see diagram 1)
Measured from floor to top of seat tube at front of seat sling.
G. Footrest Width (see diagram 1)
Measured from inside of front tube to inside of front tube on
other side. Footrest width is listed below for each seat width
and taper.
Seat Width
Straight
1" Taper
2" Taper
Outside
Measurement
2" Narrower
than Seat Width
4" Narrower
than Seat Width
6" Narrower
than Seat Width
12"
9.5"
7.5"
13"
10.5"
8.5"
14"
11.5"
9.5"
15"
12.5"
10.5"
16"
13.5"
11.5"
9.5"
17"
14.5"
12.5"
10.5"
18"
15.5"
13.5"
11.5"
19"
16.5"
14.5"
12.5"
20"
17.5"
15.5"
13.5"
H. Seat to Footrest Length (see diagram 3)
Measured from front edge of seat sling to top rear of
footrest. Footrest length of at least 2.5” shorter than
front seat height recommended.
I. Rear Seat Height (see diagram 3)
Measured from floor to top of seat tube at front of
back post. Rear seat height is custom to needs.
J. Center of Gravity Preset (see diagram 3)
Measured from front of back post to center of rear
axle. 0” indicates axle will be directly under back post.
K. Rear Wheel Spacing (see diagram 1)
Measured from outside of seat back to inside of rear
tire. Adjustable out .5” from setting.
Diagram 1
Diagram 2
Diagram 3
