HUP Lightweight 31.8mm Seat Post Clamp (27.2mm Seat Post) in Red Spring Guide Pulley: Engineering Composite with

Guide Pulley: Engineering Composite with Steel Bushing

Travel: 100mm or 120mm (select option)

and our proven ABS+ damper

Maximum Gearing: 42T (1x) or 50/34T (2x)

Triathlon or Gravel Adventure builds for the kids - with a wide range cassette and easy shifting

HUP Lightweight 31.8mm Seat Post Clamp (27.2mm Seat Post) in Red Spring Guide Pulley: Engineering Composite with***Correct size for HUP evo, HUP straatrace, HUP enduro & HUP azure frames*** Lightweight Aluminum alloy 6061 seat post clamp in Black for 31. 8mm seat tube diameter anodised finish in Red: Material: Aluminium alloy 6061 Clamp diameter: 31. 8mm Seat Post Fit: 27. 2mm Weight: 14g Color: Red Maximum pinch bolt torque 5Nm More install info here.