Dia-Compe ENE Ciclo CLA-1 Threaded Headset (ITA)

You can always count on Dia-Compe. The ENE Ciclo CLA-1 is a classic threaded 1-inch headset with modern sealed cartridge bearings - a great choice when building or restoring an older road, touring, or track bike and you want to keep the traditional design without giving up an easy-to-maintain bearing.

The cups are made from 6061 aluminum to keep the weight down and have a silver anodized finish. The headset uses sealed angular contact cartridge bearings and weighs approximately 95 grams.

This version is Italian 1-inch standard (ITA) with 1" x 24 TPI threading, a 26.4 mm crown race, and a 30.2 mm inner diameter at the frame's head tube. Italian and British/ISO 1-inch threads have the same pitch but differ in thread profile: Italian uses 55° while ISO uses 60°. In practice, they may fit the same threaded fork, but we recommend sticking with the standard already used on the fork and avoiding switching between them. It does not fit French-threaded forks.

If you're unsure which headset your frame and fork need, it's worth measuring before ordering. Differences of a few tenths of a millimeter matter a lot with older headset standards.

Quick Specs

• Product type: Threaded headset
• Size: 1 inch
• Standard: Italian / ITA
• Thread: 1" x 24 TPI
• Steerer tube: 25.4 mm
• Crown race: 26.4 mm
• Frame head tube inner diameter: 30.2 mm
• Upper stack height: 26 mm
• Lower stack height: 11 mm
• Bearings: Sealed angular contact cartridge bearings
• Cups: 6061 aluminum
• Adjusting cone: 32 mm
• Locknut: 32 mm with seal
• Weight: Approximately 95 g
• Finish: Silver anodized
• Does not fit: French-threaded 1-inch forks
• Important: Check the frame and fork headset standard before purchasing