The HP Hands On Cycle's hand cranks work directly with the front gear of the trike.

HP Velotechnik’s Newest Hand-Powered RECUMBENT Trike!

Some thoughts on the HP Hands On Cycle #cycling #trike #ride #adaptive #disability

Handcycle! Let's Ride! #mobility #handbike

PEDAL WITH YOUR HANDS?! - Sun HT-3 Handcycle AND UTCustom Hand and FOOT cycle - Utah Trikes

Amtryke 1020 Hand Cycle Assembly

Sun HT-3 Hand cycle Back In Stock!! #handcycle #trikes #adaptive #utah

Riding Recumbent Trikes on Hobble Creek is a GAME CHANGER

Sun HT-3 SX Hand Trike presented by Utah Trikes

Is This The Coolest Bike Ever Made?

Upper Body WORKOUT! - Sun HT-3 Handcycle Ride & Review

Reuse Damaged Bike To Build An Electric Bike-Cart For My Family