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 27.2mm post is 345mm long. This is the correct size for the Aurora Limited, Galaxy 500, Aurora Sport, and Compass Tricycle.
The 31.6mm post is 375mm long. This is the correct size for the EVELO Atlas.