High Performance Full Suspension Bike for Trail and Enduro

Pivot Mach 4 SL Pro XT/XTR Factory Float – Sea Foam Green

The Pivot Mach 4 SL Pro XT/XTR Factory Float – Sea Foam Green is a premium full-suspension cross-country mountain bike designed for riders who want race-level efficiency without giving up suspension performance on technical trails.

Built around Pivot's lightweight Mach 4 SL carbon frame and DW-Link suspension platform, this 29-inch bike combines a FOX Factory suspension package with a high-end Shimano XT/XTR 12-speed drivetrain. The result is a responsive XC machine that climbs efficiently, carries speed exceptionally well, and remains controlled when the trail becomes rough or demanding.

The Mach 4 SL Gen 3 platform is designed around approximately 95–115 mm of rear travel and 100–120 mm of front travel, depending on configuration. The Pro XT/XTR build is documented with the 120 mm FOX Step-Cast 34 fork and a FOX Factory Float rear shock.

Key Features

• Lightweight Mach 4 SL carbon frame

• Pivot DW-Link rear suspension

• 29-inch wheels

• FOX Factory Step-Cast 34 fork

• 120 mm front suspension

• FOX Factory Float rear shock

• Approximately 95 mm rear travel in the documented Pro build

• Shimano XTR M9100 12-speed rear derailleur

• Shimano XT M8100 shifter

• Shimano XT 10–51T cassette

• Race Face Æffect R 34T crankset

• Premium Shimano XT/XTR drivetrain combination

• FOX Transfer Factory dropper seatpost

• Maxxis Ardent Race 29 x 2.2-inch tires

• Phoenix carbon XC cockpit

• Sea Foam Green finish

Lightweight Carbon Frame

At the center of the Mach 4 SL is Pivot's lightweight carbon frame, developed specifically around the demands of modern cross-country riding.

The frame uses Pivot's Hollow Core carbon construction, helping create a stiff and responsive chassis while keeping unnecessary weight down. The Mach 4 SL Gen 3 was designed to be substantially lighter than its predecessor while adding more suspension adjustability and modern frame features.

The frame also incorporates internal cable routing, a clean integrated headset design, and compatibility with modern drivetrain standards.

DW-Link Suspension

Pivot's DW-Link suspension system is a major part of the Mach 4 SL's riding character.

The suspension is designed to provide efficient pedaling while keeping the rear wheel active over roots, rocks, and other trail irregularities. This allows the bike to accelerate efficiently on climbs without making technical terrain feel overly harsh.

The Gen 3 Mach 4 SL frame can accommodate different suspension configurations through its adjustable suspension architecture. Pivot lists the platform at 95–115 mm rear travel and 100–120 mm front travel, depending on configuration.

For this Pro XT/XTR configuration, the documented build uses the 120 mm FOX fork with the FOX Factory Float rear shock.

FOX Factory Step-Cast 34 Fork

The front end is equipped with a FOX Factory Step-Cast 34 29-inch fork.

The documented 2023 Pro XT/XTR specification uses:

• 120 mm travel

• 44 mm offset

• FIT4 damper

• Air spring

• 29-inch wheel compatibility

The Step-Cast design removes material where it can without compromising the fork's XC-oriented chassis performance. The result is a lightweight suspension fork that suits fast climbing, precise steering, and technical XC descents.

Later 2024 documentation lists the same basic FOX Factory Step-Cast 34 platform with a GRIP SL damper, so the exact damper should be verified against the model year of the individual bike.

FOX Factory Float Rear Shock

The rear suspension uses a FOX Factory Float air shock.

Combined with Pivot's DW-Link suspension, the shock provides controlled rear-wheel movement while preserving the Mach 4 SL's efficient pedaling characteristics.

The documented Pro XT/XTR configuration is listed with 95 mm of rear travel, although the Mach 4 SL Gen 3 frame supports multiple rear-travel configurations.

Shimano XT/XTR 12-Speed Drivetrain

The Pro XT/XTR build uses a carefully selected combination of Shimano's XT and XTR components.

The Shimano XTR M9100 SGS 12-speed rear derailleur provides the premium shifting component, while the Shimano XT M8100 shifter and cassette deliver dependable shifting and a broad gear range.

Drivetrain Components

• Shimano XTR M9100 SGS 12-speed rear derailleur

• Shimano XT M8100 I-SPEC EV 12-speed shifter

• Race Face Æffect R 34T crankset

• Shimano XT M8100 10–51T cassette

• Shimano CN-M8100 12-speed chain

• 1x12 drivetrain

The 10–51T cassette provides a 510% gear range, giving the rider a low climbing gear while maintaining suitable gearing for faster sections of trail.

Shimano XT Hydraulic Disc Brakes

The original 2023 Pro XT/XTR specification uses Shimano XT M8100 two-piston hydraulic disc brakes with 160 mm rotors.

These brakes provide controlled modulation and reliable stopping performance while keeping weight appropriate for an XC-oriented bike.

A later 2024 specification lists SRAM Level Silver two-piston brakes, so brake equipment can vary by model year. For a product listing, the actual inventory build sheet should take precedence.

29-Inch Wheelset

The Mach 4 SL uses 29-inch wheels, a natural fit for the bike's XC-focused design.

The original Pro XT/XTR configuration is documented with DT Swiss XR1700 aluminum wheels and DT Swiss 350 hubs.

Wheel Specifications

• 29-inch wheel size

• DT Swiss XR1700 rims

• DT Swiss 350 hubs

• 25 mm rim width

• 15 x 110 mm front axle

• 12 x 148 mm rear axle

The larger wheel diameter helps the bike maintain momentum and roll efficiently over roots, rocks, and other trail obstacles.

Maxxis Ardent Race Tires

The bike is equipped with Maxxis Ardent Race 29 x 2.2-inch tires.

The documented specification uses TR tubeless-ready construction, EXO protection, and 120 TPI casing. This combination is well suited to XC riding, offering a balance between rolling efficiency, cornering grip, and sidewall protection.

FOX Transfer Factory Dropper Post

The FOX Transfer Factory Series dropper seatpost allows the rider to quickly lower the saddle for descents and technical sections.

Documented travel varies according to frame size:

• XS–SM: 125 mm

• MD–LG: 150 mm

• XL: 175–200 mm depending on model-year specification

The dropper allows riders to move their body position more freely when descending while returning the saddle to the proper pedaling height for climbs.

Premium Phoenix Cockpit

The Pro XT/XTR build features a lightweight Phoenix cockpit designed for XC riding.

Components include:

• Phoenix Team Flat Carbon handlebar

• 760 mm handlebar width

• Phoenix Team XC/Trail stem

• 60 mm stem

• Phoenix Factory Lock-On grips

• Pivot Precision Sealed Integrated Cartridge headset

• Phoenix WTB Pro Volt narrow saddle

The relatively wide carbon handlebar provides additional steering leverage and control without turning the cockpit into an unnecessarily heavy component package.

Frame Design and Practical Features

The Mach 4 SL was designed as more than a pure race bike. Its frame incorporates features intended to make it practical for demanding trail use.

Frame Highlights

• Hollow Core carbon construction

• DW-Link suspension

• Internal cable routing

• Integrated headset design

• Modern UDH-compatible rear triangle

• Large bottle clearance

• 29-inch wheel platform

• Clearance for tires up to approximately 2.4 inches

• Adjustable suspension configuration

• Size-specific carbon tuning

Pivot's Gen 3 archive confirms the Mach 4 SL's 29-inch platform and adjustable travel range.

Technical Specifications

*Brake specifications can vary by model year. The table follows the original documented Pro XT/XTR configuration. The 2024 build records list SRAM Level Silver two-piston brakes instead.

Available Frame Sizes

The Mach 4 SL platform is offered in:

• XS

• Small

• Medium

• Large

• XL

The 29-inch platform is maintained across the size range, with the frame and component configuration adjusted for different rider sizes.

Ideal Applications

The Pivot Mach 4 SL Pro XT/XTR is particularly suited to:

• Cross-country racing

• XC training

• Marathon racing

• Fast singletrack

• Technical XC trails

• Long-distance mountain biking

• Aggressive cross-country riding

• Riders who prioritize climbing efficiency

• Riders looking for premium Shimano shifting performance

Why Choose the Mach 4 SL Pro XT/XTR?

The Mach 4 SL Pro XT/XTR occupies a sweet spot between a pure XC race bike and a more capable downcountry machine.

Its lightweight carbon frame keeps acceleration crisp, while the DW-Link suspension provides traction without sacrificing pedaling efficiency. The 120 mm FOX Factory fork gives the front end useful capability for technical trails, while the 29-inch wheels help maintain momentum over rough terrain.

The Shimano XTR rear derailleur paired with XT shifting components provides precise 12-speed shifting and a broad 10–51T range. Meanwhile, the FOX Factory suspension and Transfer dropper add premium performance throughout the bike.

Finished in Sea Foam Green, this configuration combines a refined carbon chassis with high-end suspension and drivetrain components for riders who want a fast, responsive, and versatile XC mountain bike.

Package / Bike Configuration

The documented Pro XT/XTR configuration includes:

• Pivot Mach 4 SL carbon frame

• FOX Factory Step-Cast 34 fork

• FOX Factory Float rear shock

• Shimano XTR M9100 12-speed rear derailleur

• Shimano XT M8100 12-speed shifter

• Race Face Æffect R 34T crankset

• Shimano XT M8100 10–51T cassette

• Shimano CN-M8100 12-speed chain

• Shimano XT M8100 hydraulic brakes on the original specification

• DT Swiss XR1700 wheelset

• DT Swiss 350 hubs

• Maxxis Ardent Race 29 x 2.2-inch tires

• FOX Transfer Factory dropper seatpost

• Phoenix Team Flat Carbon handlebar

• Phoenix Team XC/Trail stem

• Phoenix Factory Lock-On grips

• Phoenix WTB Pro Volt saddle

• Pivot Precision Sealed Integrated Cartridge headset

• Sea Foam Green finish

Model-Year Specification Note

The Mach 4 SL Pro XT/XTR was sold across multiple model years, and component specifications changed during that period. For example, the 2023 listing specifies FOX FIT4, DT Swiss XR1700 wheels, and Shimano XT brakes, while the 2024 listing shows FOX GRIP SL and SRAM Level Silver brakes. A 2024 carry-over specification also appears with Newmen Evolution wheels and Shimano XT brakes in some markets.

For that reason, the frame, color, suspension platform, and core XT/XTR drivetrain specifications are the safest common description, while brakes, wheels, fork damper, and dropper travel should be checked against the exact model-year inventory unit before publishing a final SKU-specific listing.