The Tricycle Association

https://tricycleassociation.org.uk/history/trike-frames/frames-jack-taylor/

Longstaff Cycles

http://www.longstaffcycles.com

Tandem Adult Tricycles

https://madtriker.com/tandem-adult-tricycles/

Vanraam Tandem Tricycles

https://www.vanraam.com/en-gb/our-bikes/tandem/twinny-plus

Roman Road Cycles

http://www.roman-road.co.uk/trikes/

Tandem Adult Tricycles

https://madtriker.com/tandem-adult-tricycles/

Tricycle Brakes

https://www.sheldonbrown.com/brake-choices.html

Tricycle Drum Brakes

https://www.sheldonbrown.com/drum-brakes.html

Tricycle Hubs & Parts

https://www.huskybicycles.com/tricycle-hubs-hub-parts.html