Zipp ZM2 SL Rear End Caps

$40.00

In Stock

Direct-fit rear end cap set for Zipp ZM2 SL hubs — available in 12x148 Microspline or 12x148 XD. Lightweight CNC construction and sealed interfaces for reliable mountain use.

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Available Options

Option	Price	Availability
Zipp, Rear End Caps for ZM2 SL, 12x148 Microspline	$40.00	In Stock
Zipp, Rear End Caps for ZM2 SL, 12x148 XD	$40.00	In Stock

Product Details

Overview & Technology

Zipp ZM2 SL Rear End Caps (Product #: 091142, MPN: 11.2028.061.001, SRAM ID HU-SPP-A0) are purpose-made replacement end caps for the ZM2 SL rear hub. Offered in 12x148 boost spacing with Microspline or XD freehub compatibility, these caps let you convert or service your hub without changing the axle or bearings. The caps are precision CNC-machined from a lightweight aluminum alloy and finished with an anodized coating to resist corrosion and everyday wear. Their press-fit interface and sealed contact surfaces maintain bearing preload and protect internals from contamination — a small part designed to preserve hub performance and wheel reliability on rough trails.

Key Features & Benefits

Direct compatibility with Zipp ZM2 SL rear hubs in 12x148 boost spacing — available in Microspline and XD freehub interfaces so you can run Shimano or SRAM 12-speed cassettes. Practical real-world benefits include low added weight, durable anodized finish, and a sealed mating surface that reduces ingress of mud and grit. Swapping worn or lost caps restores proper axle fit and keeps your hub bearings running smoothly — especially important after transport, heavy rides, or drivetrain service.

Fit, Installation & Compatibility

These rear end caps are sized for ZM2 SL hubs with 12x148 boost spacing. Choose the Microspline variant for Shimano 12-speed driver bodies or the XD variant for SRAM XD driver bodies. The hub axle end cap set installs with basic hand tools and a low-torque press or mallet for a secure fit; use an appropriate-sized drift to avoid marring the cap face. Shipping dimensions are compact (4" x 2.5" x 1.5") and weight is 0.05 lb — this is a small, precise part, so ensure you select the correct freehub interface (Microspline vs XD) and axle spacing (12x148) before ordering. If you’re unsure, confirm your hub model or bring the hub to your mechanic.

Who These End Caps Are For

If you own Zipp ZM2 SL wheels and need a replacement, upgrade or spare for trail, XC and all-mountain riding, these end caps are made for you. They’re ideal for home mechanics, wheelbuilders and riders who swap cassettes or carry spares on multi-day outings. They’re also useful for shops and technicians who service ZM2 SL hubs regularly — keeping replacement end caps in stock prevents long turnarounds and ensures proper axle alignment and bearing life after maintenance.

Key Features

✓ Direct-fit replacement for Zipp ZM2 SL rear hubs (12x148 Boost)
✓ Available for Shimano Microspline or SRAM XD 12-speed driver bodies
✓ CNC-machined aluminum alloy with anodized corrosion-resistant finish
✓ Sealed contact surfaces protect bearings from mud and grit
✓ Lightweight, low-profile design preserves hub alignment
✓ Includes SRAM Model ID HU-SPP-A0 compatibility reference
✓ Compact shipping size and negligible added weight

Specifications

Misc	12x148 Microspline

Product Identifiers

Vendor Item #	11.2028.061.001
UPC	710845902062

Frequently Asked Questions

Are these end caps compatible with my Zipp ZM2 SL hub?

Yes — these caps are made specifically for the Zipp ZM2 SL rear hub in 12x148 boost spacing. Confirm your hub model and axle spacing before ordering. Also choose the freehub interface (Microspline or XD) that matches your cassette.

What's the difference between Microspline and XD variants?

Microspline fits Shimano 12-speed freehub bodies while XD fits SRAM XD driver cassettes. The difference is the spline pattern on the freehub body; the end cap variant must match the freehub interface on your wheel.

Do I need special tools to install these end caps?

Installation typically requires basic hand tools and a low-torque press or a plastic mallet and appropriate drift to avoid damage. If you’re unsure, have a professional mechanic press them in to ensure correct seating and bearing preload.

Can these end caps be used to convert axle types?

These end caps allow correct axle spacing and freehub interface for ZM2 SL hubs in 12x148 configuration but are not universal axle converters. Use only caps designed for your hub model and axle size to maintain safe bearing preload and alignment.

How durable are the end caps on trail?

They’re CNC-machined aluminum with an anodized finish for durability and corrosion resistance. While robust, they can be damaged by improper installation or hard impacts — inspect after crashes and replace if bent, cracked or distorted.

What is the shipping weight and dimensions?

The package ships in a compact box measuring 4" x 2.5" x 1.5" and weighs approximately 0.05 lb — it’s a lightweight spare part that’s easy to carry or stock in a workshop.

Buying Guide

When buying hub end caps, verify three things: hub model, axle spacing and freehub interface. End caps are small but critical — the wrong cap can change bearing preload, misalign the axle and lead to premature wear. Choose a cap variant that matches your cassette standard (Microspline for Shimano 12-speed, XD for SRAM), and look for CNC-machined, anodized parts for long-term durability. If in doubt, contact your wheel manufacturer or a trusted mechanic with your hub model and part numbers.

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