RockShox DLX SEL/SEL+ Damper Shaft

$28.00

In Stock

Direct OEM replacement damper shaft for RockShox Deluxe RL/RT, Deluxe Select and Select+ rear shocks (2023+). Precision-machined steel construction restores damper function and serviceability; available in multiple lengths to match your shock specification.

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Available Options

Option	Price	Availability
RockShox, Damper Shaft for DLX SEL/SEL+, 37.5-45mm, 11.4118.104.450	$28.00	In Stock
RockShox, Damper Shaft for DLX SEL/SEL+, 47.5-55mm, 11.4118.104.550	$28.00	In Stock
RockShox, Damper Shaft for DLX SEL/SEL+, 57.5-65mm, 11.4118.104.650	$28.00	In Stock
RockShox, Damper Shaft for DLX SEL/SEL+, 35mm, 11.4118.104.350	$30.00	Out of Stock

Product Details

Overview & Technology

Restore smooth, dependable damping. The RockShox DLX SEL/SEL+ Damper Shaft (part 11.4118.104.xxx, SRAM ID RS-SPP-A0) is the factory replacement shaft for 2023+ Deluxe RL/RT (B1), Deluxe Select (C1) and Deluxe Select Plus (B2–C1) rear shocks. Sold in multiple stroke/length variants (35mm, 37.5–45mm, 47.5–55mm, 57.5–65mm), this damper shaft is manufactured to the same dimensional and tolerance standards as the OEM component. Built for durability and repeatable performance, the shaft is precision CNC-machined from high-strength steel and finished with a corrosion-resistant surface treatment. Tight runout and concentricity control ensure accurate piston travel, reducing uneven wear on seals and internal components so the damper retains its factory damping characteristics after service.

Key Features

Precision fit and service-grade construction. Each shaft is machined to RockShox OEM specifications (Manufacturer Part #: 11.4118.104.350 and family) to provide a drop-in replacement without modification. The exact lengths available cover common stroke assemblies, letting technicians match the original shaft length during a rebuild. Real-world benefits: replacing a worn or damaged shaft restores piston alignment, eliminates excessive play in the damper, reduces seal leakage, and prolongs the life of the cartridge assembly. Ideal when rebuilding your shock after impact, wear, or during scheduled maintenance.

Fit & Compatibility

This damper shaft is specified for RockShox Deluxe models from 2023 onward: Deluxe RL/RT (B1), Deluxe Select (C1) and Deluxe Select Plus (B2–C1). Confirm your shock's model year and internal assembly before ordering—use the SRAM Model ID RS-SPP-A0 or the manufacturer part number 11.4118.104.350 (35mm variant) to verify compatibility. Available shaft length families (35mm, 37.5–45mm, 47.5–55mm, 57.5–65mm) cover common stroke assemblies. When rebuilding, match the shaft length to the one removed or consult service documentation for your specific shock stroke to ensure correct fitment and damper travel.

Who It's For

This component is aimed at mountain bikers, mechanics, and shops performing shock service or repairs. If your Deluxe shock shows oil leaks, inconsistent damping, or internal play, replacing the damper shaft is a key step in a full damper rebuild. Home mechanics comfortable with shock teardown can install the shaft with the right tools and seals, but RockShox recommends factory-level service procedures and torque specs—consider professional installation if you're unsure. The part is also essential for race teams and riders who demand precise, reliable rear suspension behavior under demanding trail conditions.

Key Features

✓ Direct OEM replacement for RockShox Deluxe 2023+ rear shocks
✓ Precision CNC-machined high-strength steel construction
✓ Corrosion-resistant surface finish for long-term durability
✓ Available in multiple lengths to match shock stroke specifications
✓ Restores piston alignment, reduces seal wear and leaks
✓ SRAM Model ID RS-SPP-A0 and OEM part numbering
✓ Compact shipping size; lightweight spare for service kits

Specifications

Misc

35mm

Product Identifiers

Vendor Item #	11.4118.104.450
UPC	710845880544

Frequently Asked Questions

How do I know which shaft length I need?

Match the shaft length to the original component you removed during teardown or consult your shock's service manual for stroke and internal assembly details. If in doubt, measure the old shaft from end-to-end or bring your shock to a qualified service center to confirm which length variant (35mm, 37.5–45mm, 47.5–55mm, 57.5–65mm) is required.

Are seals and internal parts included with the shaft?

No. This listing is for the damper shaft only. When rebuilding a damper you should also replace seals, bushings, and any worn internal components—RockShox damper rebuild kits and seal kits are recommended to complete the job and ensure proper sealing and function.

Can I install this at home or should I use a shop?

Experienced home mechanics with the proper shock tools and RockShox service documentation can install the shaft, but damper work requires clean conditions, correct assembly order, and specified torques. If you lack tools or experience, professional service is recommended to avoid damage and maintain warranty coverage.

Is this compatible with older Deluxe models?

This shaft is specified for Deluxe RL/RT, Deluxe Select and Select Plus models from 2023 onward (SRAM ID RS-SPP-A0). Compatibility with older models isn't guaranteed—always verify by comparing part numbers and internal assembly or consult Forest Bikes support for confirmation.

What are the signs a damper shaft needs replacement?

Common signs include oil seepage from the damper body, degraded damping performance, unusual noises from the shock, or visible shaft damage (bends, dents, pitting). Excessive play in the damper or accelerated seal wear are also indicators that the shaft may be worn and should be replaced during a rebuild.

Does replacing the shaft affect damping tune?

A correct OEM replacement restores proper alignment and stroke tracking so the damper operates as intended; it should not change the damping tune if assembled with the correct internal parts and fluids. Always use the manufacturer's specified damper oil volumes and settings when reassembling.

Buying Guide

When buying a replacement damper shaft, the two most important factors are compatibility and length. Use your shock's model ID (SRAM ID RS-SPP-A0) and the OEM part number to confirm the correct family of shafts. Choose the shaft length variant that matches the removed component or consult factory service documentation for your shock stroke. Also purchase a damper rebuild kit (seals, bushings, and recommended fluids) to complete the overhaul—installing a new shaft without replacing seals can lead to premature leaks and reduced performance. If you’re not experienced with suspension internals, budget for professional labor to ensure correct assembly and preserve your shock's performance and warranty.

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