Cane Creek Thudbuster Seatpost (for all models) has 50mm of suspension travel.
The Thudbuster seatpost from Cane Creek is the most effective and versatile suspension seatpost available. The parallel-link technology provides a clear advantage in traction, comfort, and control - without sacrificing performance. Available with a range of elastomer spring rates, the Thudbuster is tunable to match your weight and riding preference.
The Thudbuster pairs well with the Kinekt Comfort Suspension Stem if you're looking for "full suspension" on your EVELO Electric Bicycle.
The Thudbuster ST has a minimum extension of 100mm. That is, you need at least four inches of exposed seatpost to install it.