RockShox Reba A7 CSU

$338.00

In Stock

Direct-fit replacement Crown/Steerer Unit (CSU) for RockShox Reba A7 (2018+). Solo Air compatible, Boost 15x110 axle spacing, aluminum tapered construction in Diffusion Black.

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Available Options

Option	Price	Availability
RockShox, Reba A7 CSU, SOLO AIR 27 BOOST™ 15X110 120mm MAX ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - REBA A7 120mm (2018+)	$338.00	In Stock
RockShox, Fork CSU - Solo Air 27 Boost™ 15X110 150mm Max Aluminum Taper Diffusion Black (No Gradients) - Reba A7 130-150mm (2018+), 11.4018.008.545	$370.00	Out of Stock
RockShox, Fork CSU - Solo Air 29 Boost™ 15X110 150mm Max Aluminum Taper Diffusion Black (No Gradients) - Reba A7 130-150mm (2018+), 11.4018.008.551	$370.00	Out of Stock
RockShox, Reba A7 CSU, SOLO AIR 27 120mm MAX ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - REBA A7 120mm (2018+)	$370.00	Out of Stock
RockShox, Reba A7 CSU, SOLO AIR 27 150mm MAX ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - REBA A7 130-150mm (2018+)	$370.00	Out of Stock

Product Details

Overview & Technology

RockShox Reba A7 CSU is the factory replacement Crown/Steerer Unit designed for 2018 and newer Reba A7 forks. Built around the proven Solo Air system, this CSU supports Boost™ 15x110 axle spacing and is available for 27.5" and 29" wheel standards with travel options from 120mm up to 150mm depending on the variant. The CSU is machined from lightweight aluminum with a tapered steerer to preserve frame steering stiffness and front-end feel. The Diffusion Black (no gradients) finish provides a durable, understated look that matches stock Reba lowers and maintains factory spec fitment, including SRAM Model ID: FS-SPP-A0 and Manufacturer Part #: 11.4018.008.545 (one common SKU).

Key Features & Real-World Benefits

Solo Air integration: The CSU is designed around RockShox's Solo Air charging port and internal routing, delivering consistent spring curve and easy pressure tuning for trail or XC rides. Riders get predictable mid-stroke support and a supple initial stroke without additional hardware. • Boost 15x110 compatibility - optimized for modern hubs and shorter chainstays. • Tapered aluminum steerer - keeps front-end stiffness high while saving weight. • Travel options - available in 120mm and 130–150mm max variants to match your frame geometry and riding style.

Fit, Compatibility & Installation

This CSU is a direct replacement for Reba A7 (2018+) forks — check your fork chassis and serial/model ID before purchase. Available SKU: 11.4018.008.545 covers Solo Air 27 (Boost 15x110) with 150mm max travel; other part numbers cover 29" wheel and 120mm variants. The SRAm Model ID FS-SPP-A0 identifies this specific spec. Installation requires basic fork service skills: remove the original crown/steerer unit, transfer or replace the steerer hardware and seals as needed, and torque to manufacturer spec. Shipping dims (~13" x 2" x 6") and weight (1 lb) make this unit easy to handle; we recommend a professional shop if you’re not comfortable pressing bearings or cutting steerers.

Who This Is For

If you own a 2018+ RockShox Reba A7 and need a like-for-like replacement crown/steerer—whether due to crash damage, wear, or an upgrade—this CSU restores factory performance and fit. It’s ideal for riders who want to preserve the original Solo Air feel, keep Boost spacing, and retain the tapered steerer geometry. Trail, XC, and light enduro riders who value low weight and direct OEM compatibility will appreciate the simple swap-in nature and factory-correct finish of the Diffusion Black CSU. If you plan to change travel, wheel size, or axle standard, confirm the exact variant before ordering.

Key Features

✓ Direct OEM replacement for RockShox Reba A7 (2018+)
✓ Solo Air compatible for easy pressure tuning and consistent spring curve
✓ Boost™ 15x110 axle spacing for modern hub compatibility
✓ Aluminum tapered steerer for stiffness and reduced weight
✓ Available in 27.5" and 29" variants, 120–150mm travel options
✓ Durable Diffusion Black finish — no gradients, factory look
✓ SRAM Model ID FS-SPP-A0 and Manufacturer Part #: 11.4018.008.545
✓ Lightweight shipping profile — 13" x 2" x 6", 1 lb

Specifications

Misc	SOLO AIR 27 120mm MAX ALUMINUM TAPER DIFFUSION BLACK (NO GRADIENTS) - REBA A7 120mm (2018+)

Product Identifiers

Vendor Item #	11.4018.008.542
UPC	710845802256

Frequently Asked Questions

What does CSU stand for and what does it replace?

CSU means Crown/Steerer Unit — the top assembly that houses the crown, steerer tube, and upper interface of the fork. This part replaces the entire crown/steerer portion on compatible RockShox Reba A7 (2018+) forks, restoring steering integrity and Solo Air compatibility.

Is this compatible with my Reba A7 from 2019?

Yes — this CSU is specified for Reba A7 model years 2018 and newer. Check your fork's model ID and wheel/travel spec to match the correct variant (27.5 vs 29, 120mm vs 150mm). If in doubt, provide your fork serial or take a photo of the crown/arch to our support team.

Does the CSU include the axle, crown race, or seals?

The replacement CSU typically ships as the crown/steerer assembly only. Small consumables such as crown races, seals, or axle hardware may need to be transferred from your original fork or purchased separately; verify the product listing and kit contents at checkout.

Can I change travel or wheel size by swapping CSUs?

You can change the listed travel option (for example 120mm vs 150mm) only if you choose a CSU variant with the desired travel and ensure it clears your frame and brake mounts. Changing wheel size may require other components (lowers, brake mounts) so confirm full compatibility before converting.

Should I have a shop install this part?

If you are not experienced with headset bearing removal, pressing crowns, or cutting steerers, we recommend professional installation. Proper torque and bearing preload are critical to safety and fork performance.

What if my fork has damage beyond the CSU?

A bent steerer or damaged lower legs requires inspection and may need additional replacement parts. The CSU restores the top end, but frame clearance, stanchion damage, or compromised internals may necessitate more extensive repair or replacement.

Buying Guide

When buying a Crown/Steerer Unit (CSU) for RockShox forks, the three most important factors are model year compatibility, axle spacing, and travel specification. Match the CSU wheel size (27.5" vs 29"), Boost or non-Boost axle standard, and the travel limit to your fork's original spec to avoid geometry and brake caliper clearance issues. Also consider condition of ancillary parts: new seals, crown races, and headset bearings are inexpensive insurance and often recommended during a CSU swap. If you're changing travel or wheel size, check whether your frame, brake mounts, and wheelset will remain compatible — consult a mechanic for conversions that deviate from stock specifications.

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