A custom limb-to-bike interface for para-cycling

Emma Warner is working towards the LA 2028 Paralympics. She needs a cycling-specific interface to position and support her residual limb, with a fit that can adapt as its shape and volume change.

Development also has to work around her training and racing. Her Merida road bike must remain available, and the new interface introduces loads the bike was not originally designed to carry. Emma set a clear requirement for the closure: she must be able to release herself from the bike.

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HQ began with a design session with Emma and her family, then built an adjustable fixture for her indoor training bike. Mounted to the seat rail, it allows position and comfort to be explored before committing to a fixed design, while limiting the time her Merida needs to spend at HQ.

An external orthopaedic partner makes the socket from a cast of Emma's limb. HQ defines its mounting position and interface geometry and designs and builds the mount and bracket hardware. A standard prosthetic adapter connects the socket to the bracket.

The dedicated Merida mount is being developed around a fixed position, with stiffness and low weight as design priorities.

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HQ has completed and handed over the adjustable seat-rail-mounted development fixture. Emma is using it on her indoor training bike, while work continues on the dedicated mount for her Merida.

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