Points of Measurement
A. wheelchair width
B. outside shell width
C. width of support surface
D. width of support surface between laterals
E. width of support surface between offset laterals
Size Chart and Fit Information
Below is a simple guide to properly fit back systems on wheelchairs. When choosing a back system, you need to consider the width of the wheelchair, back shell, support surface and type of laterals.
Evolution Back Deep™ |
| Size |
A |
B |
C |
| |
To fit wheelchair widths |
Outside width of shell |
Width of support surface |
| 14 |
14" & 15" |
14" |
13.25" |
| 15 |
15" & 16" |
15" |
14.25" |
| 16 |
15" & 17" |
15.75" |
15" |
| 17 |
17" & 18" |
17" |
16.25" |
| 18 |
18" & 19" |
18" |
17.25" |
| 20 |
19" & 20" |
20.25" |
19.5" |
Talon™ |
| Size |
C |
| |
Width of support surface |
| 14 |
10.5" |
| 15 |
11.5" |
| 16 |
11.5" |
| 17 |
13.5" |
| 18 |
14.5" |
| 20 |
16.5" |
eBack™, eBack™ Tall, Evolution Back™ and Evolution Back™ Tall |
| Size |
A |
B |
C |
D |
E |
| |
To fit wheelchair widths |
Outside width of shell |
Width of support surface |
Width of support surface with laterals |
Width of support surface with offset laterals |
| 12 |
11" & 13" |
9.375" |
8.625" |
7.375"- 7.875" |
5.875"- 6.375" |
| 14 |
13" & 15" |
11.375" |
10.625" |
9.375"- 9.875" |
7.875"- 8.375" |
| 15 |
14" - 16" |
12.25" |
11.5" |
10.25"- 10.75" |
8.75"- 9.25" |
| 16 |
15" - 17" |
13.25" |
12.5" |
11.25"- 11.75" |
9.75"- 10.25" |
| 17 |
16" - 18" |
14.25" |
13.5" |
12.25"- 12.75" |
10.75"- 11.25" |
| 18 |
17" - 19" |
15.25" |
14.5" |
13.25"- 13.75" |
11.75"- 12.25" |
| 20 |
19" & 20" |
17.25" |
16.5" |
15.25"- 15.75" |
13.75"- 14.25" |
| 22 |
21" & 22" |
19.25" |
18.5" |
17.25"- 17.75" |
15.75"- 16.25" |
| 24 |
23" & 24" |
21.25" |
20.5" |
19.25"- 19.75" |
17.75"- 18.25" |