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Mach 4 SL V4 Mountain Bike Frame
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Race-ready precision in the Mach 4 SL Frame built for XC speed
What Our Gearhead® Experts Are Saying:
"I’ve put serious miles on this platform, and with the included Fox Factory Float rear shock it feels incredibly dialed right out of the box. The dw-link suspension stays efficient when I’m hammering climbs but opens up smoothly over roots and chatter. It’s light, responsive, and sharp in technical sections. If I were building a modern XC race bike, this frame and shock combo would be at the top of my list."
When we line up for cross-country races or push the pace on our favorite singletrack loop, the Mach 4 SL Frame from Pivot gives us the speed and precision we crave. Built around Pivot’s hollow-core carbon construction and race-proven dw-link suspension design, this frame is engineered for explosive acceleration and confident handling. With the Fox Factory Float rear shock included, we get top-tier suspension performance straight from the start.
The 100mm dw-link rear suspension platform delivers exceptional pedaling efficiency while maintaining traction across technical terrain. The Fox Factory Float rear shock provides refined damping control and a lightweight design that complements the frame’s race intent. Boost spacing increases stiffness and wheel compatibility, while internal cable routing and dedicated 1x compatibility keep our build clean and modern. Designed around a 100mm fork, the geometry stays sharp and composed for today’s demanding XC courses.
Heads up - We do our best to keep bike specs and images current, but occasional component changes can happen without warning-and sometimes the photos might not show the exact build you'll receive. If you want to double-check the details, our Gearheads are always here to help.
Details
- Built for cross-country racing and marathon-speed singletrack
- Includes Fox Factory Float rear shock for premium suspension performance
- Lightweight hollow-core carbon frame construction
- dw-link rear suspension platform for efficient pedaling and traction
- 100mm rear travel optimized for modern XC terrain
- Boost 148 rear spacing for increased stiffness and wheel compatibility
- Internal cable routing for a clean and streamlined build
- Designed exclusively for 1x drivetrain configurations and dropper post compatible
- Item #PIV1X5L
- Frame Material
- Hollow-core carbon
- Suspension
- dw-link
- Wheel Size
- 29in
- Rear Shock
- Fox Factory Float
- Rear Travel
- 100mm
- Head Tube Diameter
- tapered
- SHIS
- ZS44/28.6 | ZS56/40
- Bottom Bracket Type
- PressFit
- ISCG Tabs
- ISCG-05
- Cable Routing
- internal
- Brake Type
- disc
- Seatpost Diameter
- 31.6mm
- Rear Axle
- 12 x 148mm Boost
- Tire Clearance
- up to 2.4in
- Activity
- cross-country
- Manufacturer Warranty
- limited lifetie
Mach 4 SL
Faster Where It Matters
Engineered for modern XC with size-specific carbon tuning and dw-link precision.
Pedal Efficiency. Locked Traction
dw-link balances anti-squat with small-bump compliance.
Power transfers forward without sacrificing grip
Clean Cockpit Control
Dual cable ports simplify routing and reduce noise. Wireless builds deliver a fully uncluttered front end.
Essentials. Secured Inside
Integrated downtube storage keeps tools off your body. Includes two bags and magnetic quick-link holder.
Shop the 2026 Mach 4 SL
Performance Redefined Since 2007
Pivot Cycles was founded in 2007 by industry veteran Chris Cocalis with a simple goal: build the best mountain bikes possible for riders who demand more from their ride. Drawing on decades of experience and a passion for engineering excellence, Pivot quickly became known for premium carbon frames, innovative suspension tuning, and bikes that excel across trail, enduro, downhill, and e-mountain categories. Based in Tempe, Arizona, Pivot combines precision design, rigorous testing on real terrain, and a rider-first philosophy to create machines that climb efficiently, descend with confidence, and elevate the entire riding experience. Rooted in community and a love of the sport, Pivot supports riders everywhere who know that the bike is just the beginning.