RockShox SDLX D1 Damper Shaft Assy

$55.00

In Stock

OEM-quality damper shaft assembly for RockShox Super Deluxe D1+ (2027+). Complete repair kit restores rebound control and bottom-out resistance across three shaft length variants.

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Available Options

Option	Price	Availability
RockShox, SDLX D1 Damper Shaft Assy, 37.5-45mm	$55.00	In Stock
RockShox, SDLX D1 Damper Shaft Assy, 47.5-55mm	$55.00	In Stock
RockShox, SDLX D1 Damper Shaft Assy, 57.5-65mm	$55.00	In Stock

Product Details

Overview & Technology

RockShox SDLX D1 Damper Shaft Assembly (PN 943314 / MFG 11.4118.101.000) is a factory replacement damper shaft built for the Super Deluxe D1+ rear shock introduced in 2027 and later. The assembly ships complete with the shaft, bottom-out plate, bumper, rebound needle and all necessary O-rings to return your shock to OEM damping performance. The shaft is made from a hardened steel core with a corrosion-resistant surface finish to resist wear and pitting. The kit's rebound needle is precision machined to restore consistent flow metering, while the elastomer bumper and polymer/aluminum bottom-out plate (manufacturer spec dependent) protect internals from heavy impacts — all engineered to maintain reliable damping in demanding mountain conditions.

Key Features & Benefits

Complete OEM replacement kit: includes shaft, bottom-out plate, bumper, rebound needle and O-rings for a full damper rebuild. Installing the assembly removes guesswork and ensures compatibility with D1+ internals. • Restores factory rebound tuning — precise needle tolerances recover original feel and control. • Durable shaft construction — hardened steel with corrosion-resistant finish reduces scoring and extends service life. • Integrated bump and bottom-out protection — bumper and plate absorb harsh impacts and preserve internal cartridges.

Fit, Sizes & Compatibility

The SDLX D1 Damper Shaft Assy is available in multiple stroke-compatible lengths to match Super Deluxe D1+ shock variants: 37.5-45mm, 47.5-55mm and 57.5-65mm. Select the correct variant for your shock’s shaft travel specification — incorrect length will change travel and may affect damping geometry. Compatibility notes: This part is intended for RockShox Super Deluxe D1+ models from 2027 onward and carries SRAM Model ID RS-SPP-A0. Check your shock’s service manual or OEM part list (MFG #: 11.4118.101.000 / SKU: 943314) before ordering to confirm match with your chassis and stroke length.

Who This Is For

This damper shaft assembly is for riders and mechanics who need an OEM-quality rebuild of a Super Deluxe D1+ rear shock — racers, aggressive trail riders, and bike shops performing maintenance or crash repair. If your shock exhibits inconsistent rebound, harsh bottom-outs, or internal contamination, this full assembly brings the damper back to spec. It’s also ideal for riders running heavy loads or bikepacking setups who demand repeatable damping and long-term durability in variable conditions. If you’re unsure about fit, consult a certified RockShox service center or provide your shock serial/model ID when ordering.

Key Features

✓ Complete OEM damper shaft kit restores original damping performance
✓ Hardened steel shaft with corrosion-resistant finish for long life
✓ Includes rebound needle, bumper, bottom-out plate and O-rings
✓ Available in three stroke-compatible length ranges for perfect fit
✓ SRAM Model ID RS-SPP-A0 and RockShox MFG # 11.4118.101.000
✓ Reduces bottom-out harshness and returns consistent rebound control
✓ Direct-replacement for Super Deluxe D1+ rear shocks (2027+)

Specifications

Misc

37.5-45mm

Product Identifiers

Vendor Item #	11.4118.101.000
UPC	710845932465

Frequently Asked Questions

Will this damper shaft work on my Super Deluxe D1+ shock?

If you have a RockShox Super Deluxe D1+ model from 2027 or later, this assembly is the OEM replacement. Verify your shock's stroke length and choose the matching variant (37.5–45mm, 47.5–55mm, or 57.5–65mm). Cross-check your shock serial/model ID and SRAM Model ID RS-SPP-A0 to confirm compatibility.

What tools and skills are required to install this assembly?

Installation requires standard shock service tools, clean workspace, and familiarity with damper disassembly/reassembly. You should be comfortable removing air can and damper cartridge, replacing seals and components, and torquing hardware to manufacturer specs. If unsure, have a certified RockShox service center or experienced mechanic perform the service.

Does the kit include seals and O-rings?

Yes — the SDLX D1 Damper Shaft Assembly includes the necessary O-rings that seat the shaft and prevent oil leaks. However, for a full shock service you may also want a full seal kit (air can seals, dust wipers) depending on wear.

How often should I replace the damper shaft assembly?

Replace the damper shaft assembly if you see pitting, scoring, persistent oil contamination, or degraded rebound performance that can't be fixed by simple seal replacement. Regular damper service intervals (every 100-200 hours or annually depending on use) will help identify issues early.

Are the bottom-out plate and bumper OEM or aftermarket materials?

This assembly uses OEM-spec bottom-out plate and bumper designed to RockShox tolerances. Materials often include a polymer or anodized aluminum plate and a high-density elastomer bumper sized to match D1+ geometry, offering predictable impact absorption.

Do I need to replace this when upgrading my shock tuning?

If you're changing damping cartridges or reconfiguring the damper, replacing the shaft assembly ensures needle and sealing surfaces match the new valving. For most tuning tweaks, it's not required, but it's recommended when switching to a revised cartridge or after crash damage.

Buying Guide

When selecting a damper shaft assembly for a rear shock, the two most important considerations are model compatibility and shaft/stroke length. Confirm that your shock is a Super Deluxe D1+ (2027+) and match the shaft range (37.5–45mm, 47.5–55mm, 57.5–65mm) to your existing unit to preserve travel and damping geometry. For best results order the complete kit (shaft + needle + bumper + O-rings) and plan to replace any worn seals and suspension fluid at the same time. If you're not experienced with damper service, budget for professional installation — correct bleed and torque settings are critical to reliable performance and safety.

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