S4000:
Universal folding system
Tether strap
Removable front bar
Adjustable footrest
Link brake
3 position reclining backrest
Front wheel swivel
All wheels with suspension
S1921
Aluminum frame
Airflow mesh on two sides
One hand folding
Multiple reclining backrest
Removable front bar
All wheels with suspension
Adjustable footrest
S2886
Compact folding size
Removable front bar
Adjustable footrest
Link brake
Multiple reclining backrest
All wheels with suspension
Front wheel swivel
S2550
Compact folding size
Removable front bar
Adjustable footrest
Link brake
Multiple reclining backrest
All wheels with suspension
Front wheel swivel
S3500
Compact folding size
Removable front bar
Adjustable footrest
Link brake
Multiple reclining backrest
All wheels with suspension
Front wheel swivel