Trek Round Ultra-light Carbon Seatmast Cap – 10mm Ears – 135mm X 5mm

Originally developed for the incredibly light Émonda SLR 10, the SLR seat mast cap is the lightest available for Trek bikes equipped with round seat masts.

This high-end cap comes with 7x10mm oval ears, so it’s ready for most carbon-railed saddles out of the box but able to convert to 7mm round or 7x9mm ears instead if necessary.

Key Features:

• Lighter than the standard round carbon seat mast cap
• Direct fit on all Trek road bikes with round seat masts
• One bolt head design offers easy fore-aft and infinite angle adjustment
• Includes 10 mm oval saddle clamp ears