Your Answer is

The caregiver needs to bring the end-user outside and put the wheelchair on the trunk often,
and the end-user need to push the wheelchair by himself/herself

Here are the products that suitable for your conditions.

S-Ergo 205 F20

Seat size (in) 18*16
Seat Height (mm) 470
Caster size (in) 6
Rear Wheel Size (F) 20
Max. user weight (kg) 100
Overall L x W x H (mm) 930*620*850
Overall Collapsed L x W x H (mm) 880*310*680
The total weight (kg) 11.4
The total weight without accessories (kg) 11
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KM-2500L

Seat size (in) 16*16
Seat Height (mm) 470
Caster size (in) 6
Rear Wheel Size (F) 20
Max. user weight (kg) 100
Overall L x W x H (mm) 890*560*860
Overall Collapsed L x W x H (mm) 820*280*680
The total weight (kg) 11.7
The total weight without accessories (kg) 11.7
More info