AnswerBMX Carbon Pivotal Seatpost 26.8x300mm Carbon Model=Gustav Pro Disc Brake and Lever Silicone based

Silicone based

Double-shackle 12mm hardened steel with anti-rotation deadbolt

Rear wheel built with Pillar SR TB 2018 spokes

}SRAM NX Eagle Groupset: 170mm 32 Tooth DUB Boost Crank Rear Derailleur 11-50 12-Speed Cassette Trigger Shifter and Chain

AnswerBMX Carbon Pivotal Seatpost 26.8x300mm Carbon Model=Gustav Pro Disc Brake and Lever Silicone basedSuper lightweight carbon fiber post with CNC machined aluminum Pivotal head Pivotal design allows seat to be dropped lower than is possible with conventional posts Pivotal compatible seat sold separately Model Pivotal Diameter 26. 8mm Length 300mm Setback Zero Material Carbon Color Carbon