S-PARTS M5x25mm Titanium Seatpost Screw for Trek Madone

A Grade 5 Titanium (Ti-6Al-4V) M5x25mm seatpost screw for Trek Madone, featuring a left-hand thread (reverse thread) and T25 Torx drive. Weighing approximately 2.55 g/pc, it is available in 9 colors for a lightweight titanium upgrade.

Key Specifications

High-Strength Titanium

S-PARTS Grade 5 Titanium (Ti-6Al-4V) is sourced through a civil aerospace-industry titanium supply chain.

The selected material has an average tensile strength exceeding 1,050 MPa, compared with the industry minimum of 895 MPa.

S-PARTS titanium fasteners offer mechanical performance comparable to Grade 10.9 steel fasteners while weighing approximately half as much as steel.

Precision CNC Machining

Precision CNC-machined with micron-level tolerance control for accurate, smooth-fitting threads.

Surface Finishes

Gold, Rainbow, Black and Blue finishes use a PVD nitride coating to increase surface hardness and impact resistance.

Green, Purple, Candy and Indigo finishes use an anodized finish. The oxide layer produces the titanium color through light interference and increases surface hardness and corrosion resistance.

Please Note

The Candy finish has a flowing and irregular color pattern, making each piece unique.

Some screws may show fine white lines around the threaded area. This is a normal result of the coloring process and does not affect normal use.

Please confirm that this screw matches your specific Trek Madone seatpost before ordering. Follow the torque specification marked on the seatpost when installing.