Trek Seatpost Madone SLR Gen 6 Colour-Matched Carbon Internal Seatmast Cap 20x60mm Aero x 160mm x 25mm Viper Red / Black Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button... Trek Seatpost Madone SLR Gen 6 Colour-Matched Carbon Internal Seatmast Cap 20x60mm Aero x 160mm x 25mm Viper Red / Black Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button...