Today, Pivot launches the latest version of its full-suspension XC race bike, the Mach 4 SL. Cross-country mountain bikes have undergone significant changes since the previous version came out back in 2023, and now, Pivot is bringing its XC race rocket back up to speed. The new Mach 4 SL maintains a familiar silhouette, including the brand’s signature DW-link suspension platform, but adds a touch more travel, in-frame storage, notable geometry changes, and several new complete builds to choose from.
Back in January, I was invited to Pivot HQ to test ride the new Mach 4 SL. The press event included an entry to the McDowell Meltdown XC race, where I was able to test the new bike on the race course to see how it performs between the tape. Here, I’ll cover the details of the updated Mach 4 SL, including frame design, geometry, and build options, but if you’re interested in reading about my impressions of the new bike, take a look at my first rides review.
Pivot Mach 4 SL Details
The original Mach 4 was Pivot’s first mountain bike, and it came out in waaayyyy back in 2007. Clearly, a lot has changed since then, and the Mach 4 SL has evolved numerous times over the years, ultimately becoming the XC race weapon it is today. While the new version looks similar to the outgoing model, there are some significant changes. The previous version was offered in “World Cup” and “XC” builds, with adjustable frame travel ranging between 95-103mm on the former and 106-115mm on the latter. That was paired with 100mm (World Cup) or 120mm (XC) travel forks.
Now, it seems that Pivot is narrowing its focus somewhat with just one version of the Mach 4 SL, now with adjustable travel between 110-120mm. The travel adjustment is very quick and easy using a flip-chip in the upper shock mount, and ensures that people can adapt the bike to varying race courses. All complete builds are being specced with 120mm travel suspension forks, and Pivot states that it is compatible with 130mm forks should buyers want to increase front travel. All Mach 4 SL bikes are designed for 29” wheels front and rear, with clearance for modern XC tires up to 2.4” wide.
DW-Link
Unlike the majority of high-end cross-country bikes these days, the new Mach 4 SL does not use a single-pivot flex-stay design. Instead, the brand continues to stick with its time-tested DW-Link layout, which it says is “the foundation of every Pivot.” While choosing the more complex DW-Link suspension layout undoubtedly adds a little weight, it provides the performance and ride feel that Pivot’s design team was after, something they say they can’t get from a flex-stay design.
Most notably, Pivot claims the DW-Link design allows for precisely tuned anti-squat, providing a supportive, efficient pedaling platform. At the same time, they claim it provides exceptional small bump sensitivity, excellent traction, and composure. It also allows them to hit their desired frame stiffness, claiming the Mach 4 SL has the highest stiffness-to-weight ratio of any bike in the Pivot lineup, further maximizing every watt of the rider’s energy.
Toolshed
Pivot also added its Toolshed in-frame storage to the new Mach 4 SL frame. Putting a hole in the downtube adds some more complexity, but its something that Pivot says was important to include because many long-distance riders demand/expect it. While it may not be super important to all racers, they feel it is an elegant solution that keeps your tools, tubes, and other essentials stored securely and out of the way. The bike comes with two Toolshed bags, and the compartment door includes a set of bottle bosses and is claimed to be stable, secure, and rattle-free.
By swapping the positions of the inner brackets in the Toolshed opening, riders can flip the door itself. This allows the rider to choose the latch orientation (top or bottom) and/or raise or lower the bottle bosses to suit their bottle reach preference. Another unique feature of the Tooshed door is an integrated magnet to store a quick-link. Additionally, Pivot opted against fully enclosed internal cable routing. Instead, clips to the sides of the Toolshed compartment keep cables tidy and rattle-free.
Frame Features
Keeping those cables and hoses even tidier and quieter is Pivot’s cable port system, with swappable covers to clamp them down and adapt to changing needs. Thankfully, Pivot is not on board with the through-headset cable routing, and the cable port system appears to be an effective cable management/routing solution. Of course, the Mach 4 SL has a UDH to work with all modern drivetrains, and it comes with molded rubber protection for the chainstay, seat stay, and downtube. On the underside of the top tube is an additional set of bosses for mounting accessories or tools such as Pivot’s tool dock system.
The Mach 4 SL uses a PF92 press-fit bottom bracket, which Pivot claims does not cause creaking or durability issues due to its precise machining and tolerances. Unlike most Pivot bikes, the Mach 4 SL uses standard Boost 12 x 148mm rear axle spacing to keep the Q-factor as narrow as possible. At the front of the bike, the visibly oversized head tube uses an IS 52/52 headset for stiffness and durability.
The Mach 4 SL comes in five frame sizes, using Pivot’s proprietary ride-tuning approach. According to the brand, “every frame size is engineered independently through detailed strength-to-weight analysis and custom carbon layups.” The idea is to ensure that all of the frames feel and perform the same out on the trail, regardless of size.
Weight
Pivot states the new Mach 4 SL frame weights are under 2500 grams (5.5 lbs), including the shock, and that complete builds can come in under 11 kg (24 lbs). While that is fairly light in the grand scheme of things, it is a bit heavier than most full-on XC race bikes these days. For comparison, the Yeti ASR has a claimed frame and shock weight of 1,813 grams, and the Specialized S-Works Epic 8 is reportedly right about the same at 1,810 grams (3.99 lbs). It is, however, quite comparable to other short travel DW-link bikes, such as the new Ibis Ripley SL.
With the Mach 4 SL, Pivot wasn’t just chasing weight targets. The use of the DW-Link suspension design and the addition of the Toolshed in-frame storage compartment — both of which hit the brand’s performance and feature targets — contribute to the bike’s slightly heavier weight. Still, the 24.8-pound complete bike weight of my size large Team XX SL build is nothing to scoff at. Yes, it’s a bit heavier than the lightest full suspension XC bikes on the market, but it’s still pretty darn light.
Mach 4 SL Geometry
Anyone who watches World Cup XC knows that modern XC courses have been getting increasingly aggressive, and XC bike geometry has been evolving rapidly to keep up. The previous Mach 4 SL was still perfectly capable and competitive, but after 3 years, it needed a refresh to get back up to speed. While the new Mach 4 SL’s silhouette is strikingly similar to the outgoing model, Pivot made numerous changes to the bike’s geometry.
The most obvious example is the 66-degree head tube angle, which is 0.7 degrees slacker than the previous version (XC build with a 120mm fork). Reach measurements have also grown across the board, lengthening by 8mm to 13mm, depending on the frame size. My size large test bike had a 470mm reach, up from 462mm on the previous version.
The 75-degree seat tube angle is just about spot on for a bike in this category, as are the 432mm chainstays across all sizes. The rest of the numbers are about what you’d expect from an XC race bike that’s intended to be super efficient, nimble, and ridden hard in fast-paced scenarios. Check out the geometry chart below for all of the specifics.
Mach 4 SL: Builds and Pricing
The new Mach 4 SL is offered in two frame color options: White Avalanche and Blue Stellar Fade. It comes in five complete builds, ranging in price from $6,399 to $13,999, giving riders numerous options between SRAM, Shimano, Fox, RockShox, and wired or wireless shifting. Pivot is also selling the Mach 4 SL as a frame-only with a Fox Factory Float shock for $4,499.
Team XX SL Eagle Transmission Flight Attendant: $13,999
- Fork: RockShox SID Ultimate Flight Attendant – 120mm
- Shock: RockShox SIDLuxe Ultimate Flight Attendant
- Drivetrain: SRAM XX SL AXS Transmission
- Brakes: SRAM Motive Ultimate 4-piston, 180/160mm f/r rotors
- Wheels: Reynolds Blacklabel Carbon 309/289 XC
- Tires: Front: Maxxis Rekon 29” x 2.4” EXO, Rear: Maxxis Rekon Race 29” x 2.4” EXO
- Handlebar: Pivot Phoenix Team Flat Carbon 760mm
- Stem: Pivot Phoenix Team XC/Trail – 60mm
- Seatpost: RockShox Reverb AXS
- Saddle: WTB World Cup Volt Carbon – Medium
Team XX SL Eagle Transmission: $11,999
- Fork: Fox Factory 34SL, Grip SL – 120mm
- Shock: Fox Factory Float
- Drivetrain: SRAM XX SL AXS Transmission
- Brakes: SRAM Motive Ultimate 4-piston, 180/160mm f/r rotors
- Wheels: Reynolds Blacklabel Carbon 309/289 XC
- Tires: Front: Maxxis Rekon 29” x 2.4” EXO, Rear: Maxxis Rekon Race 29” x 2.4” EXO
- Handlebar: Pivot Phoenix Team Flat Carbon 760mm
- Stem: Pivot Phoenix Team XC/Trail – 60mm
- Seatpost: RockShox Reverb AXS
- Saddle: WTB World Cup Volt Carbon – Medium
Pro XO Eagle Transmission: $8,799
- Fork: Fox Factory 34SL, Grip SL – 120mm
- Shock: Fox Factory Float
- Drivetrain: SRAM XO AXS Transmission
- Brakes: SRAM Motive Silver 4-piston, 180/160mm f/r rotors
- Wheels: DT Swiss XR1700
- Tires: Front: Maxxis Rekon 29” x 2.4” EXO, Rear: Maxxis Rekon Race 29” x 2.4” EXO
- Handlebar: Pivot Phoenix Team Flat Carbon 760mm
- Stem: Pivot Phoenix Team XC/Trail – 60mm
- Seatpost: Fox Transfer Factory
- Saddle: WTB Pro Volt – Narrow
Expert XT Di2: $7,499
- Fork: Fox Performance 34SL, Grip – 120mm
- Shock: Fox Performance Float
- Drivetrain: Shimano XT D12
- Brakes: Shimano M8200 2-piston, 180/160mm f/r rotors
- Wheels: DT Swiss X1900
- Tires: Front: Maxxis Rekon 29” x 2.4” EXO, Rear: Maxxis Rekon Race 29” x 2.4” EXO
- Handlebar: Pivot Phoenix Team Flat Carbon 760mm
- Stem: Pivot Phoenix Team XC/Trail – 60mm
- Seatpost: JD/Pivot Dropper YSP23GLS
- Saddle: WTB Pro Volt – Narrow
Ride Eagle 70/90 Transmission: $6,399
- Fork: Fox Performance 34SL, Grip – 120mm
- Shock: Fox Performance Float
- Drivetrain: SRAM Eagle 90/70 Mechanical Transmission
- Brakes: SRAM DB8 4-piston, 180/160mm f/r rotors
- Wheels: DT Swiss X1900
- Tires: Front: Maxxis Ardent Race 29” x 2.2” EXO, Rear: Maxxis Ardent Race 29” x 2.2” EXO
- Handlebar: Pivot Phoenix Race Low Rise Aluminum 780mm
- Stem: Pivot Phoenix Race XC/Trail – 60mm
- Seatpost: JD/Pivot Dropper YSP23GLS
- Saddle: WTB Race Volt – Narrow
Pivot Mach 4 SL: Availability
The new Pivot Mach 4 SL is available now. Head to the Pivot website or your local Pivot dealer to learn more or pick one up for the upcoming season.
