RockShox Shock Hardware 6X21.8

$15.00

In Stock

OEM RockShox 3-piece rear shock mounting hardware (6x21.8) — precision replacement for rear suspension mounts. Durable, corrosion-resistant finish and a direct fit for shocks using SRAM RS-SPP-A0 sizing.

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Product Details

Overview & Technology

RockShox Shock Hardware 6X21.8 is a compact, OEM-grade 3-piece rear shock mounting kit designed for reliable suspension attachment on mountain bikes. Labeled with SRAM Model ID RS-SPP-A0 and manufacturer part number 11.4118.091.604, this 1/2" 6X21.8 kit provides the precise spacing and fitment expected from RockShox service parts. The assembly is precision-manufactured to maintain alignment and reduce play at the shock eyelet. Components feature corrosion-resistant finishes and tight tolerances to keep your rear suspension running smoothly under repeated loads and varied weather conditions.

Key Features & Construction

The 3-piece kit typically includes the inner sleeve, outer bushing/washer, and retaining piece sized for a 6x21.8mm mounting interface, delivering a secure, low-friction connection between frame and shock. Materials and finishes are selected to resist corrosion and wear in real-world trail conditions, ensuring long service life. Real-world benefits: reduced side-to-side play, consistent shock articulation, and simplified servicing when replacing worn or damaged bushings. The compact shipping size and low weight make it an easy part to keep on hand for maintenance or emergency field repairs.

Fit, Compatibility & Installation

This part is intended for RockShox rear shocks and frames specifying a 6x21.8 mounting dimension and the SRAM RS-SPP-A0 model ID. Always verify your shock/frame service manual or measure the existing hardware to confirm the 6mm pin diameter and 21.8mm eye-to-eye spacer requirement before ordering. Installation is straightforward for a shop or experienced home mechanic: press or slide the sleeve into the shock eyelet, fit the bushing and washer, then secure with the correct bolt and torque as specified by the shock manufacturer. If reusing bolts, inspect threads and torque to the manufacturer’s spec to avoid over- or under-tightening.

Who This Is For

This replacement kit is ideal for mountain bikers, mechanics, and bike shops needing an OEM-quality rear shock mounting solution for RockShox-equipped bikes. It's particularly useful if you’ve noticed play at the shock eyelet, have worn bushings, or are rebuilding suspension after mileage or crash damage. Trail riders who service their own bikes and teams that keep spares on hand will appreciate the compact, lightweight nature of the part — a small component that prevents big performance losses from sloppy suspension mounting.

Key Features

✓ OEM RockShox 3-piece rear shock mounting kit (6x21.8)
✓ Designed for 1/2" bore; SRAM Model ID RS-SPP-A0 compatibility
✓ Precision-machined components for tight tolerances and minimal play
✓ Corrosion-resistant finish for long-term durability on trails
✓ Lightweight replacement — compact shipping dimensions and low weight
✓ Drop-in fit for frames/shocks specifying 6x21.8 mounting hardware
✓ Ideal spare for shops and riders doing suspension service

Product Identifiers

Vendor Item #	11.4118.091.604
UPC	710845867750

Frequently Asked Questions

Is this hardware compatible with my RockShox shock?

This kit is intended for RockShox shocks and frames that specify a 6x21.8 mounting dimension and the SRAM RS-SPP-A0 model ID. Check your shock/frame manual or measure the existing sleeve diameter and overall spacer length to confirm compatibility before ordering.

What parts are included in the 3-piece kit?

The 3-piece assembly typically consists of a precision sleeve, an outer bushing/washer, and the retaining piece sized for a 6x21.8 mount. Bolts are not always included, so verify whether your hardware package includes the axle/bolt or if you need to reuse the original fastener.

Do I need special tools to install this hardware?

Installation usually requires basic shop tools: a press or vice for gently pressing the sleeve into the shock eyelet, appropriate wrenches for the bolt, and a torque wrench to tighten to manufacturer specs. A soft-faced mallet and drift can work for light seating, but avoid hammering metal-on-metal.

How often should I replace shock mounting hardware?

Replace mounting hardware if you notice play, noise, or visible wear on bushings or sleeves. As a rule of thumb, inspect mounting hardware during suspension service intervals (e.g., every 50–100 hours of ride time) and replace if any looseness or corrosion appears.

Can I use this on non-RockShox shocks?

You can use this kit on any shock or frame that matches the 6x21.8 sizing and bolt diameter, but always verify fit and clearances. Using mismatched hardware can lead to premature wear or unsafe mounting conditions.

What torque should I use when tightening the mounting bolt?

Torque values are shock- and bolt-specific; follow the torque specification listed in your shock or frame service manual. If a spec is unavailable, consult a certified mechanic — over-torquing can damage threads and under-torquing can cause movement and wear.

Buying Guide

When buying rear shock mounting hardware, match the pin diameter and spacer length exactly — in this case 6mm x 21.8mm. OEM RockShox parts like the 6X21.8 kit offer the best assurance of fit and finish for RockShox shocks and frames, reducing the risk of unexpected play or premature wear. Consider keeping a spare kit on hand if you frequently ride remote trails or if your bike sees heavy use. When installing, always clean mating surfaces, inspect eyelets for damage, press sleeves straight, and tighten bolts to the shock manufacturer's torque specification to preserve suspension performance and safety.

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