CYCLUS TOOLS Head Tube Reamer Set - EC34, IS42. With this set of head tube reamers from Cyclus Tools, you can prepare head tubes with different inner diameters and reaming depths for mounting classic headset types with external cups. The reamer ensures the creation of perfectly flat and coaxial seats for the head tube.

In the designation of the individual reamers, the new nomenclature system (S.H.I.S. - Standardized Headset Identification System) has been adopted. This system consists of the headset type and the corresponding inner diameter of the head tube (e.g., EC 34). EC (External Cup) refers to the classic headset, while IS (Integrated Standard) refers to the integrated headset.

• IS42: Diameter: 42 mm, Reaming depth: 3.0 mm, Angle: 45°
• EC34: Diameter: 34 mm, Reaming depth: 15 mm, Reaming angle: 90°
• IS42: Diameter: 42 mm, Reaming depth: 6.9 mm, Reaming angle: 45°