$132 for 16 in chair; $132 to $183 by size (Therafin)
Drop Seat Insert
Solid seat inserts. Half-inch birch plywood drop seat with pre-drilled holes and T-nuts for building a lowered solid seat.
ADI
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ADI · Solid seat inserts · AC-272
ADI Carbon Fiber Solid Seat Base
A solid seat base gives the cushion a flat, stable platform that a fabric sling cannot. The ADI base is a flat carbon fiber pan fixed to the seat rails with machined aluminium hardware, and the whole assembly weighs about 1.5 lb. It is cut to the width and depth specified in the order, up to 18 by 18 inches, and is rated for a rider of up to 200 lb.
- Weight
- About 1.5 lb with hardware
- Weight limit
- 200 lb
- Maximum width
- 18 in
- Maximum depth
- 18 in
ADI Carbon Fiber Solid Seat Base key features
- Flat carbon fiber seat pan
- Machined aluminium mounting hardware
- About 1.5 lb including hardware
- Custom cut up to 18 in wide and 18 in deep
- Rated for riders up to 200 lb
- 12-month limited warranty
Who the ADI Carbon Fiber Solid Seat Base suits
Suits riders of rigid chairs who want a firm base under the cushion with little added weight. The maker lists fits for Invacare, Quickie, Colours and TiLite rigid models among others. Selection and setup should be done with a clinician.
Figures for comparing
- Weight
- 0.68 kg (1.5 lb)
The same units on every product, converted from the specifications below. Where a source gives two limits, the lower one is shown.
ADI Carbon Fiber Solid Seat Base specifications
| Material | Carbon fiber base, machined aluminium hardware |
|---|---|
| Weight | About 1.5 lb with hardware |
| Weight limit | 200 lb |
| Maximum width | 18 in |
| Maximum depth | 18 in |
| Sizing | Custom cut to specification |
| Listed fits | Invacare A4, A6, Top End Terminator; Quickie 2, 2HP, GP, GPV, Ti, 7; Colours Boing, Eclipse, Spazz; TiLite SX, ZR/ZRA, TR/TRA |
| Warranty | 12-month limited |
| Returns | Not returnable, cut to order |
| Maker country | USA |
| Brand | ADI |
| Category | Seat cushions, Solid seat inserts |
| Catalog ID | AC-272 |
Compared with the source page on 5 October 2026. Details can change, so we confirm them in your quote. Open the source page.
ADI Carbon Fiber Solid Seat Base: common questions
Which chairs does it mount on?
It is described as mounting on most rigid chairs, with named fits for Invacare, Quickie, Colours and TiLite models.
What is the weight limit?
The listed limit is 200 lb.
Can it be returned?
No. Each base is cut to the ordered size, and the retailer states seat bases are not returnable.
How to get a quote for the ADI Carbon Fiber Solid Seat Base
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