Ki Mobility Catalyst 4C
The Catalyst 4C is a folding lightweight aluminum wheelchair. You choose every part, and we check it against Ki Mobility's rules.
The configurable Catalyst 4, built to your measurements
The Catalyst 4C is Ki Mobility's configurable K0004 folding wheelchair. It takes the Catalyst 4 frame and adds every seat width from 14" to 22", seat depths from 14" to 20", a removable seat pan, seating system cross braces, front mount hangers and wheels up to 26". Ki Mobility gives a 16 lb. transport weight at 16" x 16".
Choose the frame, seat size, rear wheels, casters and seat heights, footrest, back, wheel locks, armrests, accessories and color. Each choice is checked against the Catalyst 4C order form as you build.
What stands out
Catalyst frame design
The Catalyst 4C uses the frame geometry of Ki Mobility's Catalyst family, in aluminum, with 1" top tubes and 1 1/8" bottom tubes.
Every seat size
Seat widths come in every inch from 14" to 22" and seat depths in every inch from 14" to 20", so the chair can match the user's hips and thighs closely.
Seat pan and seating system braces
A removable aluminum seat pan gives a firm base under a cushion, and the seating system cross braces make it easy to mount a solid seat system.
Offset axle bracket
The axle bracket is mounted less than 1/2" forward of the usual axle position. A reverse mount bracket sets the wheels further back for an amputee user.
Swing away and front mount hangers
Ki Mobility's swing away hangers have a tapered engagement that keeps the footrests snug. Front mount hangers bring the seat to footrest length down to 4" for a shorter user.
Super low frame
The super low swing away frame gives front seat heights from 13 1/2", for a user who propels with the feet or needs a low transfer.
The Hieline Insight
The Catalyst 4C suits a manual wheelchair user who needs a folding chair fitted closely to their measurements, up to 250 lbs., or 350 lbs. with the heavy duty frame. It is the Catalyst 4 with more choice: every seat width from 14" to 22", seat depths from 14" to 20", a seat pan for a firm cushion base, front mount hangers for short legs and wheels up to 26". It also suits a user who propels with the feet, because the super low frame brings the front seat height down to 13 1/2" with 4" casters. Take your hip width, seat depth, lower leg length and back height before you start, since Ki Mobility fixes every size when it builds the chair. Choose your rear wheels and casters before the seat heights, because they set the heights the page offers. Ki Mobility builds the chair to order, so it cannot be returned once it is made.
Is it right for you?
A good fit if you
- a manual wheelchair user who needs a folding chair fitted closely to their measurements
- a user up to 250 lbs., or 350 lbs. with the heavy duty frame
- a seat width anywhere from 14" to 22"
- a user with a short lower leg who needs front mount hangers
- a user who propels with the feet and needs a low front seat height
Look elsewhere if you
- a user over 350 lbs.
- a user who wants a rigid frame
- a user who needs a seat depth under 14"
- a user who needs a depth adjustable or reclining back
How you get yours
Build it
Work through the guided build one step at a time. Your progress saves as you go.
Rules checked
Every choice is checked against Ki Mobility's own rules as you build, so you cannot order a combination that cannot be made.
Add to cart
Your finished build goes in the cart at the price shown, with every part number on the order.
Made and shipped
Ki Mobility makes it to your build and it ships to you, with free shipping nationwide.
Specifications
Because the Catalyst 4C is built to order, some figures depend on the options you choose. The figures for your own build are on the build summary as you go.
Every figure here comes from Ki Mobility's own documents.
How your Catalyst 4C reaches you
Your build goes to Ki Mobility exactly as you ordered it, with every part number on the order, and ships to you when it is made. Shipping is free nationwide.
Warranty and support
The Catalyst 4C carries Ki Mobility's manufacturer warranty. Hieline supports it after the sale, and parts and repairs are handled directly through us, right here on hieline.com.
Returns
Resources
Here are the manuals, brochures, and videos for the Catalyst 4C, all from Ki Mobility.
Owner's manuals
Brochures
Order forms
Videos
Ki Catalyst - How to Operate the Swing Away Hanger
Ki Catalyst - How to adjust the Footrest
Common questions
Measure seated on a firm surface. Hip width sets the seat width, the back of the hip to the back of the knee sets the seat depth, the back of the knee to the floor in shoes sets the seat to footrest length, and the seat to the shoulder blades sets the back height. The measuring guide on the Resources tab shows each one.
250 lbs. With the heavy duty frame it carries 350 lbs. The heavy duty frame needs 6" or larger casters and is not sold with low poly tires, Superlight wheels or handrims, the 3/4" longer fork stem, Frog Legs forks or the automatic braking system.
Ki Mobility gives a transport weight of 16 lbs. at 16" x 16", with 5" x 1" poly casters and height adjustable T-arm receivers, without the footrest and rear wheels, and a standard weight of 26 lbs. Ki Mobility publishes these figures for the Catalyst 4 and 4C together.
They share the frame. The Catalyst 4C adds every seat width from 14" to 22" and seat depths from 14" to 20", the removable seat pan, seating system cross braces, front mount hangers, more rear wheels up to 26", Frog Legs forks and hydrographics. Each has its own order form, and this page builds the Catalyst 4C from its own form.
The front seat height depends on the caster size, and the rear seat height on the rear wheel size and the tire profile. Ki Mobility also limits how much lower the rear can sit than the front for each seat depth. The page offers only the heights on Ki Mobility's charts for the parts you chose.
The Catalyst 4C order form prints a minimum of 5" casters with the heavy duty frame. Ki Mobility's own online configurator asks for 6". We follow the stricter of the two so your order is not sent back.
No. The chair comes with a seat sling, or the seat pan if you choose it. A cushion is sold separately.
Ki Mobility's user manual for the Catalyst 4 series warrants the frame, cross braces, hangers and quick release axles against defects for the life of the original purchaser, with an expected frame life of five years. All other parts are covered for one year from the first purchase. Upholstery, tires, tubes, armrest pads, armrests and push handle grips are wear items and are not covered.
No. The Catalyst 4C is built to order to one user's sizes, so it cannot be returned. Ki Mobility's warranty covers defects.
No. You can order a Catalyst 4C from Hieline without a prescription.
No. Hieline does not bill or accept insurance, so the Catalyst 4C is a direct purchase. Any reimbursement is strictly between you and your insurer.
Yes. Your progress saves automatically in your browser as you go, so you can step away and pick up where you left off on the same device.
Every combination is checked against Ki Mobility's own compatibility rules as you build. An option that does not fit your other choices is greyed out with the reason printed on it, and the build cannot be added to the cart while a conflict is open.
Build your Catalyst 4C
You build the Catalyst 4C one step at a time with our guided assistant. It checks every choice against Ki Mobility's own rules, and your progress saves as you go.
Answer for the person who will use the Catalyst 4C, whether that is you, a family member or a resident in your care. You can change any answer until the build is in your cart.
The user's measurements
Every size in the build is set from these numbers.
You need the user's measurements before the build can start. Download the measuring form, fill it out with the user, and return to this page when it is done. Your progress is saved on this device, so you can pick up right here and enter the numbers.
Download the measuring formThe user's weight and height
The weight sets the weight capacity of the build. Height is optional.
Two ways to build your Catalyst 4C
You have given us the measurements. Now choose how much you want to decide. You can go deeper later without losing anything, so start wherever feels right.
The essentials, chosen for you.
Move through the choices that shape how the Catalyst 4C fits and works. We start each one from your answers, and you adjust anything you like. Every choice is checked live against the manufacturer rules as you go, so the build stays valid the whole way.
- What you decideThe essential choices
- Roughly14 decisions
- Every choiceChecked live against the rules
Best if you want a well-fitted build without weighing every option.
Every option from the order form.
Work through the complete Ki Mobility build, every choice on the order form, with the same guided steps and the same live rule checking. Nothing is hidden. This is the full depth of the Catalyst 4C, laid out so you can set each detail exactly the way you want.
- What you decideThe complete build
- Roughly68 decisions
- Every choiceChecked live against the rules
Best if you want control over every detail.
Here is the full build with its part numbers and the price you pay. Add it to your cart and check out, and it reaches our order desk as one record.
