the lightest aluminium wheelchair

TIGA Sub4 Lightweight wheelchair

Matthew Baynham
“The ease of pushing, turning and transferring into my car with such a light wheelchair was a breath of fresh air.”

Can you believe there’s a wheelchair that weighs the same as a newborn baby?

4kg*. That’s a newborn baby. A 7 week old Labrador puppy. Your Tiga Sub4. By making 72 minute but fundamental changes to the Tiga, alterations that many would simply neglect to notice, we have made an obscenely alluring, pioneering lightweight wheelchair that is as rigid and stable as it is lightweight. Transferring, propelling, lifting, turning… All effortless with your Tiga Sub4.

TIGA Sub4 Lightweight wheelchair

*excluding wheels, cushion and any non-certified options.

Technical specifications

By embracing marginal gains technology, the Tiga Sub4 has been created as an unparalleled ultra-lightweight wheelchair. A completely unique Sub4 upholstery, shortened axle and pin setup, specially designed froglegs super light castors and corrosion resistant titanium fasteners, the Tiga Sub4 is as smart as it is beautiful.

  • Made to measure
  • Less than 4kg guaranteed*
    (excluding wheels and cushion)
  • Rigid and lightweight
  • Aluminium 7020 frame
  • Optimised hollow forged castor arm
  • Low profile cross braces
  • Optimised single tube design
  • Max user weight 110kg

Unrivalled performance

Only the best materials are used in your Tiga Sub4. Aluminium is famous for its strength, durability and is synonymous with lightness. The utmost best performance of your chair is ensured by only using elements produced by market leaders, alongside a staggering 19 quality checks throughout the build, from measure to handover.

  • Optimised biomechanics for maximum power and efficiency
  • Perfect toe in toe out for minimum drag
  • Rigid and lightweight frame for pushing efficiency
  • Super light Froglegs castors, 4” x 1.25” with aluminium centre
  • Aerospace grade aluminium as standard
TIGA Sub4 Lightweight wheelchair

“I can't begin to tell you how in the past 7 months my life has changed. Transferring in and out of my car for my daily commute had become more difficult due to the weight of my old wheelchair, this became no longer a problem thanks to the Sub4. I have rediscovered my love of travel and have increased my independence to a level I never thought was possible.”
George Costigan

What’s 'made to measure' all about?

Made to measure is key to getting a wheelchair that not only fits you in size, but also gives you the best balance, comfort and posture. Getting these right will allow for complete trust in your wheelchair.

Clinical seating

  • Reduce your risk of developing severe health problems and provide optimum comfort with a frame size that’s built to you.
  • Increase the wheelchairs efficiency, make the chair compact, manoeuvrable and practical, reduce the amount of energy required to propel… All done by just having the optimum castor position.


  • Ensure comfort, pelvic positioning and balance with our range of ergonomic backrests and seats.
  • Feel snug and grounded with tapered seats and frame
  • Taper seat frame design for complete support
TIGA Sub4 Lightweight wheelchair

Functional options

  • Compact wheel locks with lightweight mounting system
  • Lightweight Carbon fibre sideguards with fender and lightweight sideguard mounting system
  • Lightweight Carbon fibre footplate with weight saving hole
  • Titanium fasteners used throughout
  • Lightweight nylon footrest mount with ‘Easy Adjustment System’
  • Many non-certified wheelchair options available
TIGA Sub4 Lightweight wheelchair

Design Features

  • Sports bearing housing with plastic top bearing
  • New stem bolt complete with integrated washer
  • Hollow forged castor arm with zero tolerance bearing alignment
  • A7075 castor axle with Titanium strengthening bolts and plastic spacers
  • Optimised axle and pin set up with Titanium sleeves
TIGA Sub4 Lightweight wheelchair


  • Polished or brushed
  • Choose an accent colour to suit your style
  • Add a personal embroidery on the backrest
TIGA Sub4 Lightweight wheelchair

Airtech Sub4 Technology

  • New mesh strap adjustable seat upholstery including low profile titanium buckles
  • Tension adjustable backrest and centre pad, including mesh cover panels and low profile titanium buckles, for better support and positioning
  • Breathable material to keep you cool
  • Lightweight and tough for longevity with kevlar reinforced wings

Do you need help with funding your RGK chair?

There are a few different ways in which you can try to get funding for your wheelchair. These choices include NHS Wheelchair Services, Access to Work and charities. To learn more about who these services are, the eligibility criteria required and how you can apply for the scheme, please click below to access our funding page.

Find out More

Interested in your own Rgk Tiga Sub4?

Enquire about the Rgk Tiga Sub4 below now!
Whether you’d like a brochure, to arrange a demo and assessment, get rough pricing or you just have some general questions about wheelchairs, complete this form and your dedicated account manager will be in touch to help you.

Your account manager can talk you through the process of getting a new chair, help you to decide which of our extensive range of products is most suitable for your needs or can arrange to get one of our highly experienced mobility advisors to visit you at your home.

Book a slot in your showroom