In 1988 RGK started a journey manufacturing made to measure, lightweight rigid wheelchair frames that were simply unavailable at the time.

Our lightest chair yet.

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Made to measure        Less than 4 KG - Guaranteed        Polished aluminium

Almost 30 years later, we are still following the same philosophy and the Sub4 is no exception. Made from aerospace grade aluminium, the Sub4 has been engineered with love, passion and sheer determination to provide the lightest made to measure wheelchair,
with no compromises.

Every component down to washers and screws have been optimised to provide our customers with a guaranteed* sub 4 kg made to measure wheelchair frame.





The made to measure frame compromises of the aluminium hand built frame which is designed to your individual requirements and the footrest, excluding the plate. Each tube has been reviewed and analysed to ensure any excess weight is removed and the reliability is maintained.
Last, but certainly not least, the upholstery is made up of a seat sling and a backrest and connects you to the frame in order to deliver a life changing product. The importance of the upholstery is second to none and each area has been reviewed to remove excess weight and maintain the function and versatility.


These parts turn a unique frame into a practical piece of equipment, which consist of castor wheels, sideguards, brakes and fasteners. Each component has been reviewed and analysed to remove any excess weight and to maintain the required function. The standard ‘on the road’ specification includes all you need with no hidden extras.


20 design changes to achieve an example weight of 1.73 kg

38 design changes to achieve an example weight of 1.2 kg

17 design changes to achieve an example weight of 0.8 kg

TIGA SUB4 // Bespoke Ultra - Light Wheelchair


Lightweight Benefits

The lighter the wheelchair, the less energy you need to push – it’s as simple as that. We understand that a small weight saving can make getting in and out of the car that little bit easier so imagine what a massive weight saving can do for you.

*Excluding wheels and cushion.

Unit 8 A/B/C Ring Road Zone 2,
Burntwood Industrial Estate,
Burntwood, Staffordshire, WS7 3JQ, UK

Call.: +44 (0) 0153 670 077 // Fax: +44 (0) 0153 670 088

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Made to measure

Less than 4 KG - Guaranteed

Polished aluminium