RockShox Shock Hardware 8X39.9

$15.00

In Stock

Genuine RockShox 3-piece rear shock mounting hardware (1/2" 8x39.9). OEM replacement kit for precise fit, corrosion-resistant finish, and lightweight durability.

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Product Details

Overview & Technology

RockShox Shock Hardware 8X39.9 is a genuine OEM 3-piece rear shock mounting kit engineered for dependable, low-friction suspension pivots. Designed and manufactured to RockShox tolerances, this hardware keeps your rear shock aligned and fast-moving parts properly spaced so your suspension performs as intended. The kit is specified as 1/2" 8x39.9 and carries RockShox/SRAM model ID RS-SPP-A0 and manufacturer part number 11.4118.091.838. Precision machining and a corrosion-resistant finish ensure long life in wet, muddy, and high-mileage conditions while maintaining tight dimensional control for consistent damping and bushing life.

Key Features & Benefits

Purpose-built for rear suspension: This 3-piece set provides the correct sleeve, spacer, and bushings (as applicable) to maintain correct shock alignment and preload. Using OEM hardware avoids play that can wear shock mounts and pivots prematurely. • OEM fit: Direct replacement for RockShox rear shock mounts — no machining or modification required. • Precision dimensions: 8 x 39.9 mm dimensioning with a 1/2" nominal mount interface for compatible bolts. • Durable finish: Corrosion-resistant surface treatment helps resist rust in wet and winter riding. • Lightweight and compact: Small shipping weight and minimal mass added to your frame.

Fit, Specifications & Compatibility

This kit is intended for RockShox rear shocks and frames that use an 8×39.9 sleeve profile with a 1/2" mounting bolt interface. Confirm compatibility by checking your shock/frame service manual or the original hardware for matching dimensions and RockShox model ID RS-SPP-A0. Product specifics: Manufacturer part number 11.4118.091.838, RockShox product number 942684. Shipping dimensions are 4.125" x 2.75" x 0.75" and weight is listed at 0.01 lb — a compact OEM replacement shipped ready for installation.

Who This Is For

This shock hardware is ideal for mountain bikers who maintain, rebuild, or replace rear suspension components on RockShox-equipped frames. If you’re doing routine service, replacing worn sleeves, or restoring a used bike to factory specification, this OEM kit delivers the correct tolerances and finish you need. Mechanics, home wrenchers, and bike shops who want to avoid compatibility issues with aftermarket pieces will appreciate the direct-fit nature and RockShox provenance. Suitable for cross-country, trail and enduro riders running RockShox rear shocks that call for 8×39.9 hardware.

Key Features

✓ Genuine RockShox OEM 3-piece rear shock mounting kit
✓ Designed to 8 x 39.9 mm sleeve dimensions with 1/2" mount interface
✓ RockShox/SRAM model ID RS-SPP-A0 — exact factory fit
✓ Manufacturer part # 11.4118.091.838 and product #942684
✓ Precision-machined for consistent pivot alignment and low play
✓ Corrosion-resistant finish for wet and winter riding durability
✓ Compact, lightweight replacement—ships ready to install

Product Identifiers

Vendor Item #	11.4118.091.838
UPC	710845868344

Frequently Asked Questions

What exactly is included in the 3-piece kit?

The RockShox 8X39.9 3-piece shock hardware is supplied as a factory-matched set sized for the specified sleeve profile and mounting interface. It provides the components required to recreate the factory mounting stack (sleeve/spacer/bushing elements) so the shock is correctly located and free to articulate without play.

How do I confirm compatibility with my shock/frame?

Check your shock or frame service manual for mounting sleeve dimensions (8 x 39.9 mm) and bolt size (1/2" nominal). You can also compare the RockShox model ID RS-SPP-A0 or part number 11.4118.091.838 with the original hardware on your bike to ensure an exact match.

Can I install this myself, and do I need special tools?

A basic bike toolset is usually sufficient — hex keys, open-end wrenches, and a torque wrench for final tightening. Use appropriate suspension grease where recommended and follow RockShox torque specs. If you’re unsure, a professional mechanic can fit the hardware quickly and verify alignment.

Does this hardware require periodic replacement?

Yes. Mounting sleeves and bushings wear over time, especially in muddy or high-mileage use. Replacing the hardware when you notice play, creaks, or visible wear restores correct suspension articulation and prevents damage to shock mounts.

Is this an OEM part or aftermarket equivalent?

This is a genuine RockShox OEM replacement part (manufacturer part #11.4118.091.838) manufactured to the brand’s specifications for fit and durability. Choosing OEM reduces the risk of fitment issues compared with generic aftermarket hardware.

What if the part doesn’t fit my bike?

If you discover it’s not compatible, Forest Bikes accepts returns per our returns policy. Double-check measurements and part numbers before ordering, and contact our support team if you need help verifying fit for your specific RockShox shock or frame.

Buying Guide

When replacing rear shock mounting hardware, measure the existing sleeve length and bore or confirm the part number from the shock/frame. OEM kits like RockShox 8X39.9 guarantee dimensional fidelity and minimize the risk of introducing play that can damage mounts or affect shock performance. For installation, clean mating surfaces, apply a thin layer of suspension-safe grease, and tighten mounting bolts to the torque values specified by RockShox. If you aren’t confident in the measurement or installation, a pro mechanic can swap the hardware quickly and check suspension alignment and function.

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