DT Swiss Ratchet System Ring Nut Removal Tool

The genuine DT Swiss workshop tool is the essential specific key for carrying out in-depth maintenance on your hubs from the Swiss brand.

Custom-designed to fit perfectly into the threaded ring nut of the freehub body, this tool enables precise removal with no risk of slipping or deformation when replacing bearings or the drive mechanism.

To accurately meet the requirements of the brand's different drive generations, this tool is available in three distinct spline options: standard Ratchet System, Ratchet EXP, and Ratchet EXP OS. 

• Ratchet Standard Version (Ref. HXTXXX00N5027S): Designed for the classic Star Ratchet system (dual floating ratchets). Compatible with DT Swiss 240, 240s, 340, 350, 440, 540 hubs and classic generation complete wheels.
• Ratchet EXP Version (Ref. HXTXXX00N8387S): Designed for the Ratchet EXP mechanism (fixed ratchet on the hub body side). Compatible with DT Swiss 180, 240 EXP, 350 EXP hubs and recent high-end wheels.
• Ratchet EXP OS Version (Ref. HXTXXX00N3157S): Designed for the Ratchet EXP Over Size mechanism (oversized axles). Compatible with specific hubs featuring reinforced axles (particularly for aggressive MTB / E-Bike use and 20 mm axles).

Common key features across the range

• HIGH-PRECISION MACHINING: Manufactured from high-strength original manufacturer steel to withstand heavy loosening torque without wearing out.
• PERFECT FITMENT: Ultra-strict tolerances preserving the ring nut splines during maintenance operations.
• WORKSHOP PRACTICALITY: Profile designed for a firm grip in a mechanic's vise or using a suitable open-ended spanner.

Technical specifications

• Usage: Fitting and removing the hub threaded ring nut
• Available in:
    - Ratchet Standard (Ref. HXTXXX00N5027S)
    - Ratchet EXP (Ref. HXTXXX00N8387S)
    - Ratchet EXP OS (Ref. HXTXXX00N3157S)
• Material: Hardened machined steel
• Tool engagement: Vise jaws or open-ended spanner
• Manufacturer: DT Swiss

Workshop tips

• Loosening procedure: The threaded ring is screwed with a standard right-hand thread (anti-clockwise to loosen). Due to natural self-tightening caused by pedalling, the initial breakaway torque can be very high.
• Leverage technique: Clamp the tool securely face-up in a workshop vise, position the wheel vertically on the tool to engage the teeth, then rotate the complete wheel using the rim as a leverage arm.
• Spline check: Never force the tool if it does not fit in seamlessly. Standard Ratchet and Ratchet EXP profiles have different tooth counts and diameters.