Ki Mobility Catalyst 4
The Catalyst 4 is a folding lightweight aluminum wheelchair. You choose every part, and we check it against Ki Mobility's rules.
A folding chair from the Catalyst family, built to your measurements
The Catalyst 4 is Ki Mobility's folding K0004 wheelchair. It shares the Catalyst frame design with swing away hangers, and its offset axle bracket sits less than 1/2" forward of the usual axle position. 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 4 order form as you build.
What stands out
Catalyst frame design
The Catalyst 4 uses the frame geometry of Ki Mobility's Catalyst family, in aluminum, with 1" top tubes and 1 1/8" bottom tubes.
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 hangers
Ki Mobility's swing away hangers have a tapered engagement that keeps the footrests snug, and they carry a lifetime warranty to the original purchaser.
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.
Heavy duty frame
The heavy duty frame raises the user weight capacity from 250 lbs. to 350 lbs. on the same chair, with casters of 5" or larger.
MAXX Mag wheels
Black magnesium MAXX Mag wheels come at no charge in 20", 22" and 24", and never need spoke maintenance.
The Hieline Insight
The Catalyst 4 suits a manual wheelchair user who needs a folding chair that can be fitted to their measurements, up to 250 lbs., or 350 lbs. with the heavy duty frame. 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 to their measurements
- a user up to 250 lbs., or 350 lbs. with the heavy duty frame
- a seat width of 14", 16", 18", 20" or 22"
- 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 16"
- 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 4 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 4 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 4 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 4, 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 order form on the Resources tab shows each setting.
250 lbs. With the heavy duty frame it carries 350 lbs. The heavy duty frame needs 5" or larger casters and is not sold with low poly tires, the 3/4" longer fork stem 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. Its specification table gives a standard weight of 26 lbs.
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.
Ki Mobility shows them on one page, and each has its own order form. The Catalyst 4C offers more seat widths and depths, a seat pan and seating system cross braces. This page builds the Catalyst 4 only, from its own form.
No. The chair comes with a seat sling. A cushion is sold separately.
Ki Mobility publishes one photograph of the Catalyst 4 on its own. The other photographs on its Catalyst 4 and 4C page show the Catalyst 4C, so we do not use them here.
Ki Mobility 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 4 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 4 from Hieline without a prescription.
No. Hieline does not bill or accept insurance, so the Catalyst 4 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 4
You build the Catalyst 4 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 4, 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 4
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 4 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 4, 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.
