• Park Tool 790
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PARK TOOL

PARK TOOL 790 Guide for #690-XXL

Manufacturer’s ref.: 790
The PARK TOOL 790 Guide (55.9 mm) for #690-XXL centres the HTR-1 head tube reaming and facing set when the head tube is to... Read more
45,99 €
45,99 €
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Description

The PARK TOOL 790 Guide (55.9 mm) for #690-XXL centres the HTR-1 head tube reaming and facing set when the head tube is to be faced only, without reaming. It replaces the 789 reamer for facing-only work and is used with the 690-XXL facer.

Sized to the SHIS specification for ZS56 and EC56 head tubes with an internal diameter of 55.90 to 55.95 mm (1.5" internal-cup standard).

Outer diameter: 55.9 mm.

⚠️ The 750.2 centring adaptor is essential. Always use a cutting fluid, such as Park Tool CF-2, when machining.

Compatible with HTR-1, HTR-1B and HTR-HS sets.

Technical information

Brand: Park Tool
Manufacturer's reference: 790
Category: Bicycle tools - Frame and fork
Tool type: Centring pilot for facing (without reaming)
Headset compatibility: 1.5" internal cups, SHIS ZS56/EC56
Outer diameter: 55.9 mm
Use with: 690-XXL facing cutter, 750.2 centring adaptor (required)
Tool compatibility: Park Tool HTR-1, HTR-1B, HTR-HS kits
Required accessory: Cutting fluid (e.g. Park Tool CF-2)
Made by: Park Tool, USA
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Pricing information

*Recommended retail price from supplier in September 2026