Quad Lock Stem Cap Phone Mount – 1-1/8" Steerer, Black, Aluminum

The Quad Lock Stem Cap Mount provides a clean, centered mounting solution for riders who want their phone directly above the stem. It replaces your standard top cap and integrates seamlessly with the Quad Lock system for a secure and minimalist cockpit setup. Key Functional Details Direct stem cap replacement for a clean, centered mounting position CNC-machined aircraft-grade aluminum construction Compatible with all Quad Lock phone cases and adapters Includes 5mm headset spacer and 3mm index spacer for fit adjustment Reversible design to suit different stem angles (+/- 15° typical) Compact, low-profile mounting with minimal cockpit clutter Technical Specifications Mount Type Stem Cap Mount Steerer Size 1-1/8" (28.6mm) Material CNC Aluminum Finish Black Anodized Compatibility Quad Lock System Included 5mm Spacer, 3mm Index Spacer, Hardware Compatibility & Technical Notes Fits bikes with standard 1-1/8" threadless steerer tubes Replaces existing stem top cap (requires proper headset preload during install) Compatible with all Quad Lock cases and universal adapters Best suited for bikes with neutral or moderate stem angles (+/- 15°) NOT compatible with threaded headset systems NOT compatible with oversized steerer tubes (e.g., 1.25" or 1.5") NOT ideal for bikes requiring frequent headset adjustments Service / Ownership Context This mount is ideal for riders who want a permanent, centered phone position without handlebar clutter. Installation requires removing the stem cap and correctly setting headset preload, so basic mechanical knowledge is recommended. Fit & Use Signals Good Fit: Road, gravel, and MTB bikes with threadless headsets Good Fit: Riders wanting a clean cockpit setup Good Fit: Navigation-focused riding (phone centered in view) Not A Fit: Bikes with threaded headsets Not A Fit: Oversized steerer tubes Not A Fit: Riders uncomfortable adjusting headset preload Key install detail: this replaces the top cap, so headset preload must be reset correctly—common mistake is over- or under-tightening. Always snug preload first, then tighten stem bolts. Works best with a small spacer stack—too many spacers can affect fit. Great upsell with Quad Lock case + vibration dampener. Not ideal for carbon steerers without proper compression plug setup—confirm before install.