SPHERE 3.0 WP 48 XACT Air MX Hydraulic Cartridge 2021-2025 Dal Soggio

The Dal Soggio 1P.SPH.XACT2125MX3.0 SPHERE 3.0 is a complete sealed and pressurized hydraulic cartridge developed specifically for WP 48 XACT motocross front forks used on compatible KTM and Husqvarna motorcycles from 2021 to 2025.

Dal Soggio classifies this version specifically for Cross / Motocross use, distinguishing it from the XACT 2021-2023 Enduro configuration and from the later XACT Closed Cartridge versions.

SPHERE 3.0 represents the latest evolution of the Dal Soggio hydraulic cartridge platform, developed to provide increased front-end sensitivity while maintaining the hydraulic support required for demanding motocross conditions.

A key development is the redesigned bladder system. The SPHERE 3.0 bladder is thinner and stronger than the previous design, improving cartridge sensitivity and allowing greater precision during hydraulic bleeding.

The compression system uses a redesigned base valve with separate High-Speed Compression and Low-Speed Compression adjustment, giving the rider or suspension technician independent control of the two damping ranges.

SPHERE 3.0 also increases the compression piston diameter from 28 mm to 36 mm. Dal Soggio developed this larger piston to improve the linearity of the complete front-fork response.

The cartridge also incorporates Direct Flow Technology, which allows suspension oil to reach the piston directly rather than travelling through Z-shaped passages. This creates a more direct hydraulic path and reduces stress inside the cartridge.

For motocross use, this combination is designed to improve sensitivity, front-wheel feedback, support, and damping consistency across braking bumps, ruts, jumps, landings, and repeated high-speed impacts.

Key Features

• Developed specifically for WP 48 XACT motocross front forks on compatible KTM and Husqvarna models from 2021 to 2025
• New thinner and stronger bladder improves cartridge sensitivity and hydraulic bleeding precision
• Independent High-Speed and Low-Speed Compression adjustments provide greater control over motocross suspension setup
• 36 mm compression piston replaces the previous 28 mm design to improve front-fork linearity
• Direct Flow Technology delivers oil directly to the piston without Z-shaped passages, reducing hydraulic stress

Technical Specifications

Specification	Details
Manufacturer	Dal Soggio Race
Part Number / SKU	1P.SPH.XACT2125MX3.0
Product Family	SPHERE 3.0
Product Type	Sealed and Pressurized Hydraulic Cartridge
Fork Platform	WP 48 XACT
Configuration	MX / Cross
Primary Brands	KTM / Husqvarna
Compatibility Period	2021-2025
Suspension Position	Front
Pressure Compensation	Bladder system
Compression Piston Diameter	36 mm
Previous SPHERE Piston Diameter	28 mm
Compression Adjustment	Independent High-Speed / Low-Speed
Oil-Flow Architecture	Direct Flow Technology
Cartridge Oil	Dal Soggio CUBE Fork Oil 5W
Installation Type	Complete internal hydraulic cartridge
Professional Installation	Recommended

Application & Compatibility

The 1P.SPH.XACT2125MX3.0 is officially specified by Dal Soggio for:

• WP 48 XACT front forks
• KTM
• Husqvarna
• Cross / Motocross applications
• 2021 to 2025

Compatibility depends on the motorcycle being equipped with the corresponding WP 48 XACT motocross fork architecture.

This cartridge should not be confused with:

• 1P.SPH.XACT2321EN3.0 – WP 48 XACT 2021-2023 Enduro configuration
• 1P.SPH.XACT-CCEN3.0 – WP 48 XACT Closed Cartridge Enduro version
• 1P.SPH.XACT-CCMX3.0 – later WP 48 XACT Closed Cartridge MX version for specific US applications

Correct identification of the original fork is essential before installation.

SPHERE 3.0 Bladder System

SPHERE 3.0 uses a sealed and pressurized hydraulic architecture with an internal bladder for pressure compensation.

The latest bladder is designed to be thinner and stronger than the previous generation.

This modification is intended to improve:

• initial cartridge sensitivity;
• response to rapid suspension movement;
• bleeding precision;
• consistency of internal pressure management.

These characteristics are especially relevant in motocross, where the fork is repeatedly subjected to rapid impacts and large variations in suspension velocity.

Independent High- and Low-Speed Compression

The redesigned SPHERE 3.0 compression base valve allows separate adjustment of:

• High-Speed Compression
• Low-Speed Compression

These terms refer to fork movement speed, not motorcycle speed.

Low-speed compression adjustment influences slower suspension movements such as braking load, chassis pitch, and gradual weight transfer.

High-speed compression becomes more relevant during rapid fork movements generated by sharp bumps, braking bumps, jump faces, and landings.

Independent adjustment allows a more precise balance between support, traction, comfort, and impact absorption.

36 mm Compression Piston

The SPHERE 3.0 compression piston has been increased from 28 mm to 36 mm.

According to Dal Soggio, this larger piston improves the linearity of the complete front suspension response.

The 36 mm piston operates together with the revised base valve and Direct Flow system as part of the complete SPHERE 3.0 hydraulic architecture.

Direct Flow Technology

The Direct Flow Technology used in SPHERE 3.0 provides a more direct route for suspension oil.

Instead of directing the fluid through Z-shaped internal passages, the piston receives oil directly.

This design is intended to:

• reduce hydraulic stress inside the cartridge;
• simplify the oil-flow path;
• improve damping consistency;
• provide more direct suspension response.

Motocross Application

This version of SPHERE 3.0 is specifically developed for the WP XACT MX platform.

The cartridge is intended to provide the hydraulic support required for motocross while retaining sensitivity and front-wheel feedback.

Typical motocross suspension demands include:

• repeated braking bumps;
• fast successive impacts;
• deep ruts;
• jump takeoffs;
• heavy landings;
• high suspension velocities.

The SPHERE 3.0 architecture is designed to maintain controlled damping throughout these varying conditions.

Recommended Oil

SPHERE cartridges use Dal Soggio CUBE Fork Oil 5W.

Using the specified suspension fluid helps maintain consistent hydraulic response, lubrication, bleeding quality, and repeatable damping performance.

Installation Note

Installation requires replacement of the relevant original fork internals with the SPHERE 3.0 cartridge system.

Correct cartridge installation, hydraulic bleeding, spring selection, oil level, compression and rebound adjustment, and final suspension setup are essential.

Because motocross suspension setup depends strongly on rider weight, speed, track conditions, spring rate, and riding style, installation and calibration by a qualified suspension technician or Dal Soggio specialist are recommended.