The PRO Gap Cap Carbon is a lightweight unidirectional (UD) carbon headset top cap that finishes off the front of your steerer with a clean, race-ready look while preloading the headset bearings. Designed for 1-1/8" alloy steerer tubes, it pairs an alloy star nut with an anodised alloy bolt for a secure, low-fuss setup.

Highlights

  • UD carbon top cap for a premium, lightweight finish
  • Supplied complete with alloy star nut and anodised alloy bolt
  • Sets headset bearing preload on threadless (Aheadset-style) forks
  • Sized for 1-1/8" steerer tubes

Compatibility & fit

Fits standard 1-1/8" threadless steerer tubes. This cap and star nut are intended for alloy (non-carbon) steerers only. Do not fit the included star nut to a carbon steerer tube, as star nuts can damage carbon — carbon steerers require an expander-style compression plug instead. If you are unsure of your steerer material, check with your mechanic or contact Tune Cycles before fitting.

Covered by PRO's manufacturer warranty against defects in materials and workmanship. For any warranty claim or support, return the item to Tune Cycles and our team will assist.
  • Unidirectional (UD) carbon top cap
  • Includes alloy star nut and anodised alloy bolt
  • Suits 1-1/8" threadless steerer tubes
  • For alloy (non-carbon) steerers only — not for carbon steerers
  • Clean, lightweight finish for the front of the cockpit
Part typeHeadset top cap (gap cap) with star nut and bolt
Top cap materialUnidirectional (UD) carbon
Bolt materialAnodised alloy
Star nut materialAlloy
Steerer diameter1-1/8"
Steerer compatibilityAlloy (non-carbon) steerers only
IncludedTop cap, star nut, bolt
Manufacturer part no.PRHS0070
SKU SHM-PRHS0070
Barcode # 8717009339223
Brand PRO