Bontrager Carbon Seatmast Cap, 135mm x 5mm, Round Mast, Domane/Emonda/Madone

Lightweight and aerodynamic carbon mast cap for Trek road bikes with round seat masts. This 135mm length, 5mm offset version positions the saddle slightly forward, ideal for more aggressive fitment or rider preference.

• One-bolt design with infinite angle and fore-aft adjustment

• Carbon construction for reduced weight and added performance

• Direct fit for round mast Trek frames

• Torque spec: 6–8 Nm

• Genuine Trek component purchased directly from the manufacturer

• Does not include rotary head hardware

• Weight: 130g

• Includes only what is pictured

For Domane SL/SLR (2012–2019), all Emonda SL/SLR, Madone 5/6/7 series (2010–2015)
Contact your local Trek dealer for any required installation hardware or additional parts.