Trek Domane MKIII Color-Matched Gloss Internal Mast Cap

The Trek Domane MKIII Color‑Matched Gloss Internal Mast Cap is a lightweight, aerodynamic seatmast cap designed specifically for Domane MKIII frames. It offers a clean, integrated look with color‑matched finishing and multiple length/offset options to dial in your perfect fit.

• Ultra‑light carbon construction

• Aerodynamic, low‑profile design

• Color‑matched finish for seamless Domane MKIII integration

• Available in 155 mm or 200 mm lengths

• Available in 5 mm or 20 mm offsets

• Compatible with 7 mm round saddle rails

• 7 mm round and 10 mm oval clamp ears sold separately

• Gloss finish