Zipp 77 Disc QR Cap
Zipp

Zipp 77 Disc QR Cap

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OEM replacement front quick-release axle end cap for Zipp 77 Disc wheels. CNC‑machined alloy, SRAM HU‑SPP‑A0 compatible for secure, lightweight hub fit.

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Product Details

Overview & Technology

Zipp 77 Disc QR Cap (Part #: 11.1918.047.000, SKU 090840) is the OEM front quick‑release axle end cap for Zipp 77 Disc wheels. Designed as a direct replacement or spare, this cap restores the correct axle interface and clearance for road disc setups that use a quick‑release skewer. The cap is crafted with precision in mind — typical of Zipp parts — featuring a CNC‑machined aluminum construction with an anodized finish for corrosion resistance and clean aesthetics. It’s engineered to mate exactly with Zipp hub flanges and the SRAM model ID HU‑SPP‑A0, ensuring proper preload, axle alignment, and consistent wheel seating under braking and cornering loads.

Key Features & Benefits

Built for dependable everyday performance: • OEM fit: Exact form factor for Zipp 77 Disc front hubs — eliminates play and ensures rotor alignment. • SRAM-compatible: Matches SRAM model HU‑SPP‑A0 specifications for interchangeability. • Lightweight alloy: CNC‑machined aluminum keeps weight minimal while maintaining stiffness. • Durable finish: Anodized surface resists corrosion from road conditions and frequent wheel removals. Real-world benefits include precise wheel seating every time you install the wheel, reliable engagement of the quick‑release skewer, and maintaining the correct rotor-to‑caliper spacing — especially important on deep‑section rims like the 77 Disc where tolerances are tight.

Fit, Compatibility & Installation

This cap is specified for the Zipp 77 Disc front hub with quick‑release systems. Check the hub shell and current end cap markings: the part maps to SRAM Model ID HU‑SPP‑A0. It's intended only for QR (9mm) front axle use — it will not fit thru‑axle forks or hubs that require 12mm/15mm end caps. Installation is straightforward: remove the skewer and old cap, press the new cap into the hub bore until fully seated, then reinstall your skewer and check wheel alignment. No special tools are required, but inspect the cap seating and ensure there’s no axial play before each ride. If in doubt, have a pro mechanic confirm fitment, especially on mixed OEM/aftermarket hubs.

Who This Is For

Road riders and mechanics who own Zipp 77 Disc wheels and need a reliable OEM replacement or spare cap. This part is ideal for racers, club riders, and workshop techs who prioritize precision fit and lightweight components on deep‑section disc wheels. Also useful for riders replacing lost or damaged caps after transport, crashes, or frequent wheel changes. If you use a thru‑axle fork or an e‑bike hub, choose the correct end cap type for those systems instead of this QR cap.

Key Features

  • ✓ OEM replacement for Zipp 77 Disc front quick‑release hubs
  • ✓ Compatible with SRAM Model ID HU‑SPP‑A0
  • ✓ CNC‑machined aluminum body for low weight and stiffness
  • ✓ Anodized finish prevents corrosion from road exposure
  • ✓ Simple press‑fit installation — no special tools required
  • ✓ Restores precise rotor‑to‑caliper alignment on deep rims
  • ✓ Compact, lightweight spare for race day or travel

Specifications

Misc 77 Disc Brake QR

Product Identifiers

Vendor Item # 11.1918.047.000
UPC 710845768545

Frequently Asked Questions

Will this cap fit my Zipp 77 Disc front wheel?

Yes — this is the OEM front quick‑release end cap specified for Zipp 77 Disc wheels. Confirm your wheel uses a QR (9mm) front axle and check hub markings or original cap model to match SRAM ID HU‑SPP‑A0.

Can I use this cap on thru‑axle forks?

No. This cap is designed for quick‑release front axles only. Thru‑axle forks and hubs require different end caps sized to the axle diameter (e.g., 12mm, 15mm). Using the wrong cap can damage bearings or create unsafe wheel play.

Do I need tools to install the 77 Disc QR cap?

Installation is typically a simple press‑fit: remove the skewer, press the cap into the hub bore until seated, and reinstall the skewer. No specialized tools are necessary, but a bench vise with soft jaws or a plastic drift can help seat the cap evenly without cosmetic damage.

What if my cap is lost or damaged — is this an exact replacement?

Yes — this Zipp 77 Disc QR cap is intended as an exact OEM replacement. It restores the correct axle interface and rotor clearance. If you’re unsure about compatibility, bring your wheel to a shop or contact Forest Bikes with your hub serial for confirmation.

How durable is the cap in wet or salty conditions?

The anodized aluminum construction resists corrosion and road grime, but like any small alloy part it benefits from routine inspection. Clean and lightly grease mating surfaces during service, and replace if threads, bores, or sealing faces show wear.

Does this part affect hub bearings or preload?

When installed correctly, the cap maintains the hub’s designed axle spacing and allows the quick‑release skewer to set proper preload. Incorrect caps or poor seating can introduce play or uneven preload, so always verify wheel tightness and bearing smoothness after installation.

Buying Guide

When replacing hub end caps, match the cap to your hub model and axle standard first — QR caps differ from thru‑axle caps in bore diameter and length. Choose OEM or OEM‑equivalent parts (like this Zipp cap) to preserve bearing preload, axle alignment, and rotor spacing on deep‑section wheels. Consider material and finish: CNC‑machined aluminum caps offer an excellent balance of weight and stiffness, while anodizing adds corrosion resistance. Keep a spare cap in your toolkit if you race or travel frequently to avoid downtime from lost or damaged parts.

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