The dimensions for this trike carrier is below the outside rail widths are not adjustable, the width is 9.25". For larger trikes we unfortunately do not carry a carrier for them. Here is a site you can check out for more of the full size trikes. http://hydralift-usa.com/trike-lift/ Dimensions of Carrier:
- Carrier rail length: 71.5"
- Center carrier rail width: 6.375"
- Outer carrier rails width: 9.25"
- Center ramp length:57.5"
- Outer ramp length:60"
- Center ramp width:5.5"
- Outer ramp width:10"
- Main tube length: 50"