RockShox DLX/SDLX Coil B1 Damper Shaft

$60.00

In Stock

OEM replacement damper shaft for RockShox Deluxe and Super Deluxe Coil B1+ (2023+). Precision hardened steel shaft (blank) available in multiple stroke lengths for accurate rear shock rebuilds.

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Available Options

Option	Price	Availability
RockShox, Damper Shaft for DLX/SDLX Coil B1, 37.5-45mm, 11.4118.109.450	$60.00	In Stock
RockShox, Damper Shaft for DLX/SDLX Coil B1, 47.5-55mm, 11.4118.109.550	$60.00	In Stock
RockShox, Damper Shaft for DLX/SDLX Coil B1, 57.5-65mm, 11.4118.109.650	$60.00	In Stock
RockShox, Damper Shaft for DLX/SDLX Coil B1, 67.5-75mm, 11.4118.109.750	$60.00	In Stock

Product Details

Overview & Technology

Direct replacement damper shaft designed for RockShox DLX/SDLX Coil B1+ rear shocks (2023+). This item (Mfr. Part # 11.4118.109.450, Product #943065) includes the blank damper shaft and is identified by SRAM Model ID RS-SPP-A0. It’s supplied in multiple stroke-length variants (37.5–45mm, 47.5–55mm, 57.5–65mm, 67.5–75mm) to match the shock internals and travel of your bike. The shaft is manufactured from high-strength, precision ground steel with a corrosion-resistant finish to maintain seal life and smooth damping performance during repeated compression cycles. As a core service part, it’s built to OEM tolerances so it integrates with the DLX/SDLX hardware and piston stacks without fitment issues.

Key Features & Construction

Purpose-built construction: the damper shaft uses hardened, precision-ground steel with a protective coating to resist wear and minimize friction against guide seals. The blank configuration lets trained technicians cut and finish the shaft to exact length and spec when performing a rebuild or remanufacture. • OEM compatibility: RockShox DLX/SDLX Coil B1+ (2023+) • SRAM Model ID: RS-SPP-A0, Mfr Part #: 11.4118.109.450 • Available stroke ranges: 37.5–45mm, 47.5–55mm, 57.5–65mm, 67.5–75mm • Precision-ground hardened steel with corrosion-resistant surface

Fit, Sizes & Compatibility

This damper shaft is specifically sized for the Deluxe Coil B1+ and Super Deluxe Coil B1+ rear shocks introduced in 2023 and later. Choose the variant that matches your shock’s internal stroke or the OEM service manual spec — the product listing provides exact stroke ranges (mm) for each SKU so you can match by measurement or part number. Shipping dimensions are compact (4" x 1" x 2") and the part ships light (0.25 lb). Because this is a service part supplied as a blank damper shaft, installation typically requires shop tools and the shock service know-how — cutting, chamfering and final surface finishing should be performed by a qualified suspension technician to ensure leak-free operation and correct damping behaviour.

Who This Is For

Built for mountain bikers, suspension techs and shops that maintain RockShox DLX/SDLX Coil-equipped bikes. If you’re servicing a Coil B1+ or Super Deluxe Coil B1+ shock after wear, impact damage, or as part of a full rebuild, this OEM damper shaft restores factory fit and performance. Not recommended as a DIY swap unless you have shock rebuild experience and access to a shock press, precision cutting tools and seal installation gear. This part is aimed at riders who want factory-correct replacement components and shops performing professional suspension work.

Key Features

✓ OEM replacement shaft for DLX/SDLX Coil B1+ rear shocks (2023+)
✓ Available in four stroke length ranges to match shock travel
✓ Precision ground hardened steel for long-term wear resistance
✓ Blank shaft format allows accurate shop-level finishing and cutting
✓ SRAM Model ID RS-SPP-A0 and Mfr. Part #: 11.4118.109.450
✓ Compact shipping (4" x 1" x 2") and lightweight (0.25 lb)
✓ Restores factory tolerances for reliable damping performance

Specifications

Misc

37.5-45mm

Product Identifiers

Vendor Item #	11.4118.109.450
UPC	710845881565

Frequently Asked Questions

Which shocks is this damper shaft compatible with?

This shaft is compatible with RockShox Deluxe Coil B1+ and Super Deluxe Coil B1+ rear shocks from 2023 onward. Verify compatibility by checking your shock's service manual or matching your OEM part number and SRAM Model ID RS-SPP-A0.

What does 'blank damper shaft' mean?

A blank damper shaft is supplied uncut and unfinished to OEM length so a suspension technician can cut and finish it to the exact internal length and tolerance required by your particular shock. This allows precise rebuilds but requires shop tools and skill.

How do I choose the correct stroke length variant?

Select the variant whose stroke-range (e.g., 37.5–45mm, 47.5–55mm, 57.5–65mm, 67.5–75mm) matches your shock’s internal specification or the original part number. If unsure, consult your shock's service manual or contact a qualified suspension shop with your shock serial number.

Can I install this myself at home?

Installation requires shock service tools, precision cutting and finishing, and seal/shaft interface expertise. We recommend having a certified suspension technician perform the replacement to ensure leak-free performance and correct damping characteristics.

Is this an OEM RockShox part and what is the part number?

Yes — this is an OEM RockShox part. Manufacturer Part Number is 11.4118.109.450 (Product #943065) and the SRAM Model ID is RS-SPP-A0. Check the variant SKUs for alternate stroke lengths and their corresponding part numbers.

Does the damper shaft include seals or other hardware?

This listing includes the blank damper shaft only. Seals, pistons and other hardware are sold separately; plan to use a full shock service kit when rebuilding to replace worn seals and ensure optimal performance.

Buying Guide

When buying a replacement damper shaft, first identify your shock model, serial number and OEM part number. Choose the correct stroke-range variant to match your shock's internal travel and use a full service kit at the same time — seals and pistons should be replaced during any damper shaft swap. This shaft is supplied blank and intended for professional finishing; if you don’t have the tools or experience, order the part and schedule a rebuild with a certified suspension shop to ensure factory-level damping and longevity.

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