TOOPRE Bicycle Stem Top Cap Kit – Diamond Cut Lightweight Aluminum Alloy Headset Top Cap with M6x30mm Stainless Steel Screw for Mountain & Road Bike Customization

Despite its complex structural facets, this headset cap embraces aggressive weight reduction protocols. The outer edge profile is precision-milled down to a razor-thin 1mm, keeping the net weight of the cap and bolt combination at an astonishingly low 15.85 grams. It delivers maximum clamping stability to your fork steerer system without adding unnecessary bulk to your weight-optimized cross-country, trail, or road racing build.

To guarantee that your customized accent pieces retain their brilliant coloration over years of exposure to harsh outdoor elements, TOOPRE uses industrial-grade Physical Vapor Deposition (PVD) vacuum coating technology. By bonding composite micro-layers such as Titanium Nitride (TiN) and Titanium Aluminum Carbon Nitride (TiAlCN) onto the alloy substrates, the finished surface achieves superior hardness. This barrier protects against sweat acidity, UV fading, rain, mud, and superficial abrasions.

Every package ships as a complete, direct-replacement kit. The top cap is paired with an ultra-strong M6x30mm stainless steel structural screw featuring a deep 5mm internal hexagon socket drive. This ensures tool engagement is precise and slip-free during final torque sequences. The screw threads are cleanly cut to provide absolute engagement security inside your fork’s star nut assembly.

Each stem top cap and matching plated screw is nestled neatly inside a tailored, shock-absorbing EVA foam insert. This lining is enclosed within a durable, branded TOOPRE metal tin box measuring 9.1cm x 6.3cm x 1.8cm. This presentation-grade packaging ensures the contents are completely protected from micro-scratches during international transit, making it a perfect gift choice for any cycling enthusiast.