Zipp Zipp Carbon
Zipp

Zipp Zipp Carbon

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Zipp UD carbon headset spacer set for 1-1/8" steerers. Lightweight, precision-bored spacers (2×4mm, 8mm, 12mm, 30mm) to dial cockpit height with race-ready looks.

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Product Details

Overview & Technology

Zipp Carbon Headset Spacers (Manufacturer Part #: 00.1915.124.010, Product #: 150235) are a precision set of UD carbon spacers engineered for 1-1/8" steerer tubes. The kit includes two 4mm spacers, one 8mm, one 12mm and one 30mm spacer to give you fine-grain control over handlebar height and stack height adjustments. Construction and finish: made from unidirectional (UD) carbon fiber with a high-quality resin matrix and a smooth, low-gloss finish for a subtle, factory look. Each spacer is molded and heat-cured to maintain concentricity and then finished to a tight inner bore tolerance so they slip on cleanly and sit flush against integrated and semi-integrated headsets.

Key Features & Benefits

Lightweight and stiff: UD carbon saves grams over aluminum spacer stacks while maintaining excellent compressive stiffness so your headset preload stays consistent under load. That translates to a crisp front-end feel and a tidy cockpit without extra bulk. Precision fit and clean aesthetics: the inner bore is sized for 1-1/8" steerers and the outside profile is optimized to stack neatly under top caps and stem faces. The set provides versatile stacking options — from micro adjustments with the 4mm pieces to larger changes with the 30mm spacer — letting you tune fit without changing stem angle.

Fit, Compatibility & Installation

Designed specifically for 1-1/8" steerer tubes and compatible with most integrated and semi-integrated road headsets. These spacers are not tapered — they require a straight 1-1/8" steerer or appropriate reducer sleeve if used on non-standard systems. SRAM Model ID: AC-ZHSC-A1 for reference when matching to headset families. Installation is straightforward: slide spacers onto the steerer, stack to desired height, ensure the top cap and star nut/compression plug preload the headset correctly, then torque your stem bolts to the manufacturer's spec. Avoid over-torquing the spacer stack itself; spacers are designed to transfer preload through the compression plug and stem clamp, not to be clamped tight directly.

Who It's For

This spacer set is aimed at road and performance cyclists who want a lightweight, factory-finish cockpit. Ideal for racers, fit-focused riders, and anyone building a clean, minimal-looking bike where every gram and millimeter matters. If you swap stems frequently, experiment with handlebar height, or want carbon-matched hardware to your stem and fork, these spacers offer an elegant, durable solution that elevates both performance and style.

Key Features

  • ✓ UD carbon construction for low weight and high compressive stiffness
  • ✓ Complete stack: 2×4mm, 1×8mm, 1×12mm, 1×30mm for precise adjustments
  • ✓ Inner bore sized for straight 1-1/8" steerer tubes (integrated headsets)
  • ✓ Finished in subtle low-gloss carbon to match high-end components
  • ✓ SRAM Model ID AC-ZHSC-A1 and Zipp part 00.1915.124.010 for fit reference
  • ✓ Light, durable alternative to aluminum spacer stacks with clean aesthetics

Specifications

Material Carbon
Steerer Tube 1-1/8''

Product Identifiers

Vendor Item # 00.1915.124.010
UPC 710845674655

Frequently Asked Questions

Are these spacers compatible with tapered 1.5" down tubes?

No. These Zipp spacers are machined for a straight 1-1/8" steerer. They will not fit tapered steerers without an adapter sleeve. Use only on forks or steerer assemblies that provide a straight 1-1/8" section where spacers sit.

Can I use carbon spacers under my stem — are they strong enough?

Yes. UD carbon spacers are designed to handle headset preload and normal stem clamping forces when installed correctly with a compression plug. Do not over-tighten stem bolts beyond manufacturers' torque specs and ensure the compression plug bears the top-cap preload.

How should I clean and maintain these spacers?

Wipe spacers with a soft cloth and mild detergent or isopropyl alcohol. Avoid harsh solvents that can affect resins. Inspect for cracks or chips after crashes; replace any spacer with visible damage to maintain safe headset assembly.

Can I mix these carbon spacers with aluminum spacers?

Yes — mixing carbon and aluminum spacers is common. Ensure the contact surfaces are clean and the stack is stable. Be mindful of potential galvanic corrosion only if there are exposed metals in contact with dissimilar metals in damp environments; proper assembly typically avoids this issue.

What's included and how do I choose stack heights?

The set includes two 4mm spacers, one 8mm, one 12mm and one 30mm. Use the 4mm pieces for fine adjustments, 8mm and 12mm for moderate changes, and the 30mm spacer for larger raises. Combine spacers to hit exact handlebar height without changing stem rise.

Will these work with integrated carbon forks and upper crowns?

Yes, if the integrated headset is designed for a 1-1/8" steerer and the spacer bore matches your steerer OD. Double-check your headset documentation — some integrated systems have specific spacer profiles or bearing preload limits.

Buying Guide

When choosing headset spacers, prioritize steerer compatibility, material, and stack versatility. Carbon spacers like these Zipp UD pieces save weight and look cleaner than aluminum, but confirm the steerer diameter is a straight 1-1/8" and that your headset accepts standard spacer profiles. Decide how much adjustability you want: a kit with multiple small spacers (4mm) plus larger pieces (30mm) offers the most flexibility for fitting without trial-and-error stem swaps. Finally, match finish and brand where possible for a cohesive cockpit aesthetic and consistent tolerances.

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