ToolInfoBox Headset Spanners

Synonyms:	DE:Steuersatzschlüssel
Location:	Bike Lounge

Wiki Entry: Eldi Professional Headset & Cone Spanners

This entry covers the professional-grade, ultra-flat workshop wrenches manufactured by the historic German brand Eldi (Eugen Lingelbach Darmstadt). These tools are industry standards for servicing vintage cup-and-cone hubs and threaded bicycle headsets.

   Brand Overview: Eldi was a premier German manufacturer of heavy-duty bicycle workshop tools. Known for using high-grade, extremely hardened tool steel, these vintage wrenches are highly sought after today for their durability and resistance to rounding off flat components under high torque.

1. Vinyl-Grip Flat Wrenches (Blue / Green Handles)

Tool Types: Oversized Cone Spanners & Threaded Headset Wrenches.
Key Sizes: Typically found in 30 mm, 32 mm, 36 mm, and 40 mm (for headsets), as well as standard hub sizes like 15 mm.
Function: Designed with an ultra-thin profile to fit into narrow wrench flats on hub cones and locknuts without binding adjacent parts.
Workshop Design: The color-coded vinyl dipped handles provided comfort during all-day workshop use and allowed mechanics to quickly identify sizes on the tool board.

2. Offset Double-Open Ended Headset Spanners (All-Steel)

Tool Type: Traditional Chromed Headset Wrenches.
Design Feature: Features a distinct angled/cranked (offset) head profile at both ends.
Function: The offset bend allows the mechanic to flush-seat the wrench onto flat headset locknuts, providing proper hand clearance and preventing scraped knuckles against the bicycle frame, stem, or brake cables.

Collector & Workshop Notes

Value & Rarity: Since Eldi ceased production, these tool sets have high collector value in the vintage restoration scene (especially for classic European racing and touring bikes).
Care Tip: Keep the bare steel components lightly oiled to prevent surface rust, and avoid using them with cheater bars, as excessive leverage can widen the precise jaw tolerances over time.