High Performance Full Suspension Bike for Trail and Enduro

Pivot Mach 4 SL Ride GX Transmission – Midnight Sky

The Pivot Mach 4 SL Ride GX Transmission – Midnight Sky is a lightweight, full-suspension cross-country mountain bike built for riders who want efficient climbing, quick acceleration, and confident handling on technical XC terrain.

At its core is Pivot's Hollow Core carbon Mach 4 SL frame, paired with an XC-focused DW-Link suspension platform. The Ride GX Transmission build combines 120 mm of front travel with 95 mm of rear travel, 29-inch wheels, a wireless SRAM GX Eagle Transmission drivetrain, and four-piston SRAM DB8 hydraulic brakes.

The result is a fast and versatile XC bike that remains capable when the trail becomes rough, steep, or technical. Pivot's Mach 4 SL platform is designed around efficiency and precision while retaining meaningful suspension performance rather than sacrificing capability simply to reduce weight.

Key Features

• Lightweight Hollow Core carbon frame

• XC-tuned DW-Link suspension

• 95 mm rear travel

• 120 mm front travel

• FOX Performance Step-Cast 34 fork

• FOX Performance Float rear shock

• 29-inch wheels

• SRAM GX Eagle Transmission 12-speed wireless drivetrain

• SRAM AXS Pod Controller

• 10–52T SRAM GX 1275 Eagle Transmission cassette

• SRAM GX Eagle DUB 32T crankset

• SRAM DB8 four-piston hydraulic brakes

• DT Swiss X1900 wheelset with DT Swiss 370 hubs

• Maxxis Ardent Race 29 x 2.2-inch tires

• Dropper seatpost

• Pivot Cable Port System

• Internal cable routing

• Large water-bottle clearance

• UDH-compatible frame

• Midnight Sky finish

Hollow Core Carbon Frame

The Mach 4 SL uses Pivot's Hollow Core carbon construction, designed to provide high stiffness without adding unnecessary frame weight.

The frame features size-specific carbon layups, allowing Pivot to tune the ride characteristics across the available frame sizes. This helps maintain appropriate stiffness and handling whether the rider is on an XS, Small, Medium, Large, or XL frame.

Pivot also incorporates internal cable routing and molded frame protection in areas exposed to impacts, cable movement, and trail debris. The frame provides generous bottle clearance, including space for a large bottle on every size.

DW-Link Suspension

The Mach 4 SL uses Pivot's DW-Link suspension system, tuned specifically for cross-country riding.

This Ride GX Transmission configuration provides 95 mm of rear-wheel travel and is paired with a 120 mm front fork. The suspension is designed to remain efficient while pedaling but active enough to maintain traction across roots, rocks, and uneven surfaces.

The Mach 4 SL platform also incorporates adjustable suspension characteristics, allowing the bike to balance efficient XC performance with additional capability on technical trails.

FOX Performance Step-Cast 34 Fork

The front suspension uses a FOX Performance Step-Cast 34 29-inch fork with:

• 120 mm travel

• 44 mm offset

• GRIP damper

• Air spring

• 34 mm chassis

The Step-Cast architecture helps keep the fork lightweight, which is particularly important for an XC-focused bike. At the same time, the 34 mm chassis and 120 mm travel provide useful stiffness and control when riding technical descents.

FOX Performance Float Rear Shock

A FOX Performance Float rear shock controls the Mach 4 SL's 95 mm rear suspension.

The air-sprung shock works with the DW-Link platform to provide a balance between pedaling efficiency and rear-wheel traction. Riders can tune the air pressure and rebound characteristics to suit their weight, riding style, and terrain.

SRAM GX Eagle Transmission

The major drivetrain feature of this build is the SRAM GX Eagle Transmission 12-speed electronic drivetrain.

Unlike a traditional mechanical drivetrain, the GX Eagle Transmission uses wireless electronic shifting through the SRAM AXS Pod Controller.

Drivetrain Specifications

• SRAM GX Eagle Transmission 12-speed rear derailleur

• SRAM AXS Pod Controller

• SRAM GX Eagle DUB crankset

• 32T chainring

• SRAM GX 1275 Eagle Transmission cassette

• 10–52T gear range

• SRAM GX Eagle Flattop 12-speed chain

The 10–52T cassette provides a wide climbing range, with the 52-tooth largest sprocket giving the rider a low gear for steep climbs while maintaining useful high gears for faster sections of trail.

The wireless system also eliminates conventional derailleur cables, creating a clean cockpit and simplifying shifting adjustments.

SRAM DB8 Four-Piston Brakes

The documented Ride GX Eagle Transmission build uses SRAM DB8 four-piston hydraulic disc brakes.

This is an important distinction from some retailer listings that specify SRAM Level brakes. The model-year build records consistently identify DB8 four-piston brakes, so that specification is used here.

The build uses 160 mm SRAM Centerline six-bolt rotors front and rear. The four-piston calipers provide strong braking control while remaining appropriate for the bike's XC and trail-oriented design.

DT Swiss X1900 Wheels

The Ride GX Transmission build uses DT Swiss X1900 wheels paired with DT Swiss 370 hubs.

Wheel Specifications

• 29-inch wheel size

• 25 mm rim width

• DT Swiss 370 hubs

• 15 x 110 mm front spacing

• 12 x 148 mm rear spacing

The 29-inch format helps the Mach 4 SL carry momentum and roll efficiently across 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 casing, and 120 TPI. This combination is well suited to XC riding, balancing relatively fast rolling characteristics with additional sidewall protection for rocky and technical trails.

The tires can be configured tubeless with compatible rims, valves, sealant, and rim tape.

Dropper Seatpost

A dropper seatpost is included, allowing the saddle to be lowered from the handlebar before descending.

The documented Ride GX Transmission builds use SDG Tellis posts, with travel varying according to frame size. Earlier specifications list:

• XS–SM: 105–125 mm

• MD–LG: 130–150 mm

• XL: 150–170 mm

The dropper gives the rider more freedom of movement on steep terrain while allowing the saddle to return to full height for efficient climbing.

XC-Focused Cockpit

The Mach 4 SL Ride GX Transmission uses a Phoenix cockpit designed around efficient XC handling.

Components include:

• Phoenix Race Low Rise Aluminum handlebar

• 780 mm width

• Phoenix Team XC/Trail stem

• 60 mm stem

• Phoenix Factory Lock-On grips

The 780 mm handlebar provides useful steering leverage for technical terrain, while the 60 mm stem maintains the responsive steering characteristics expected from an XC platform.

Practical Frame Features

The Mach 4 SL combines race-oriented weight savings with features that make it practical for everyday trail riding.

Frame Highlights

• Internal cable routing

• Pivot Cable Port System

• Injection-molded rubberized frame protection

• Large water-bottle clearance

• UDH rear derailleur hanger

• Size-specific carbon layup

• 29-inch wheel platform

• Clearance for tires up to approximately 2.4 inches

• XC-tuned DW-Link suspension

Pivot's current Mach 4 SL information confirms compatibility with 29-inch wheels only and tire clearance up to 2.40 inches on suitable 28–30 mm rims.

Technical Specifications

These specifications follow the documented Ride GX Eagle Transmission configuration rather than mixing it with the different Ride GX/X01, Pro X0, or newer-generation Mach 4 SL builds.

Available Sizes

The Mach 4 SL platform is available in:

• XS

• Small

• Medium

• Large

• XL

Pivot uses size-specific carbon construction to maintain appropriate ride characteristics across the size range. The platform is designed around a relatively low standover height and broad rider-height coverage.

Ideal Applications

The Pivot Mach 4 SL Ride GX Transmission is well suited for:

• Cross-country racing

• XC training

• Marathon mountain biking

• Fast singletrack

• Technical XC trails

• Long-distance rides

• Efficient climbing

• Trail riding

• Riders who prioritize low weight and acceleration

• Riders wanting electronic wireless shifting

Why Choose the Mach 4 SL Ride GX Transmission?

The Pivot Mach 4 SL Ride GX Transmission – Midnight Sky combines the efficiency of a dedicated XC bike with enough suspension and braking capability for modern technical trails.

The lightweight carbon frame and DW-Link suspension help the bike accelerate quickly and maintain traction on climbs. The 120 mm FOX fork adds confidence on technical descents, while the 95 mm rear suspension keeps the bike efficient under pedaling.

The SRAM GX Eagle Transmission is another major advantage. Its wireless electronic shifting and 10–52T cassette provide precise gear changes and a broad climbing range without traditional derailleur cables.

For riders looking for a fast, lightweight, responsive, and technologically advanced XC bike, the Mach 4 SL Ride GX Transmission offers a strong combination of carbon-frame efficiency, modern suspension, wireless shifting, and 29-inch rollover performance.

Package / Bike Configuration

The documented Ride GX Eagle Transmission configuration includes:

• Pivot Mach 4 SL Hollow Core carbon frame

• FOX Performance Step-Cast 34 120 mm fork

• FOX Performance Float rear shock

• SRAM GX Eagle Transmission 12-speed rear derailleur

• SRAM AXS Pod Controller

• SRAM GX Eagle DUB 32T crankset

• SRAM GX 1275 Eagle Transmission 10–52T cassette

• SRAM GX Eagle Flattop 12-speed chain

• SRAM DB8 four-piston hydraulic brakes

• SRAM Centerline 160 mm six-bolt rotors

• DT Swiss X1900 wheelset

• DT Swiss 370 hubs

• Maxxis Ardent Race 29 x 2.2-inch tires

• SDG Tellis dropper seatpost

• Phoenix Race Low Rise Aluminum handlebar

• Phoenix Team XC/Trail stem

• Phoenix Factory Lock-On grips

• Pivot Precision Sealed Integrated Cartridge headset

• Midnight Sky frame finish

Specification Note

The Mach 4 SL Ride GX Eagle Transmission was produced across multiple model years, and some retailer listings contain conflicting component information. In particular, SRAM DB8 four-piston brakes are documented for the Ride GX Transmission build, while some retailer pages list Level TLM or other brake configurations. The specification above follows the dedicated 2023–2025 Ride GX Eagle Transmission build records. Components can also change without notice, so the manufacturer's build sheet should take precedence for a specific inventory unit.