Mach 4 SL
A Podium Seeking Missile
Meet the all new Mach 4 SL; a podium seeking missile crafted from the ground up as a testament to speed without compromise. It is designed to win gold and slaughter KOMs, and do so while delivering an otherworldly ride quality, telepathic handling, and a potent blend of acceleration and tractability.
XC racing is a designer’s nightmare. Racers are often too willing to sacrifice suspension quality, handling integrity, frame durability, traction, and comfort entirely in the pursuit of less weight and more speed. Look no further than the proliferation of flex-stay designs in the current XC racing market. They are all basically single pivot bikes, utilizing a design that was considered questionable 25 years ago, focused solely on light weight via reduction of moving parts. They may be light, but that’s about all.
With the new Mach 4SL, we call BS on that paradigm. You want it fast? You got it. This bike is a Rocketship. You want it light? Check out the sculpted minimalism of the Mach 4SL’s rocker link, or the sleek but incredibly effective rear triangle. It’ll go toe to toe with the lightest, fastest race bikes in the world. It meets that reductive performance criteria, but delivers so much more.
Adjustable
Rear Travel
29"
Wheel Size
Carbon
Material
Less Weight
Thanks to the continuing evolution of our proprietary Hollow Core carbon fiber construction, the new Mach 4SL carves an impressive 280 grams out of the previous generation Mach 4SL. This impressive absence of mass was achieved while improving on our excellent performing dw-link suspension, and without sacrificing strength, frame stiffness or handling integrity. The new Mach 4SL is World Cup light, with suspension performance that puts the rest of the field to shame.
More Suspension
We’ve tweaked our acclaimed dw-Link suspension to deliver the immediate acceleration and responsiveness that racers crave, but also to serve up better, more tractable performance across the entire ride spectrum. The kinematics are tailored for pedaling efficiency and outright speed without sacrificing comfort or compliance. This is highly evolved, thoroughly refined suspension, not some compromised band-aid. The Mach 4SL brings the heat, but also vastly improves upon the current notion of race bike tractability and suspension performance. Think of it as the fun way to the top step of the podium.
Better Handling
Lighter, faster, more capable everywhere. That’s the Mach 4SL in a nutshell. Our design brief was “World Cup focus, but let it punch above its weight”. So we gave it some more reach, steepened the seat angle, backed off the head angle, opened up the wheelbase, and built a bike that can handle serious speed with total composure. This, combined with the flex-free integrity of the Mach 4 SL’s chassis, encourages full-on red-mist hammering without any sketchy side effects. It’s a race bike first and foremost, but it’s a hell of a fun party on the way to the checkered flag.
More Fun
Because not every day is race day, because sometimes our best races are with ourselves, because racing itself should have some fun thrown in somewhere to buffer the suffering, the Mach 4SL is as versatile as it is speedy. The World Cup build can yield 95mm or 103mm of rear travel, easily adjusted by a flip chip on the rocker. The Trail build, aimed at squeezing as much fun as humanly possible out of a ride while going really really fast, delivers either 106 or 115mm of rear travel thanks to a brand new FOX Float rear shock. There’s tire clearance for 2.4” rubber, and room for two water bottles. Short track domination? World Cup dreams? Marathon Mindset? Singletrack shredding? Yes. Do it all.
Build Your Mach 4 SL
We strive to build the best-performing cycling products in the world.
BUILD SPECS
Graphics, colors, and specifications are subject to change without prior notification.
QUALITY CRAFTSMANSHIP
GEOMETRY AND SIZING
We strive to build the best-performing cycling products in the world.
| 100mm TRAVEL FORK | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|
| A: Seat Tube Length (C-T) | 35.5 | 39.4 | 41.9 | 46.0 | 50.5 |
| B: Top Tube Length | 56.5 | 58.0 | 60.9 | 63.8 | 66.2 |
| C: Head Tube Length | 8.5 | 9.0 | 10.5 | 12.0 | 13.5 cm |
| D: Head Tube Angle | 68° | 68° | 68° | 68° | 68° |
| E: Seat Tube Angle* | 76.° | 76.° | 76.° | 76.° | 76.° |
| F: Chain Stay Length | 43.2 | 43.2 | 43.2 | 43.2 | 43.2 |
| G: Bottom Bracket Height | 32.7 | 32.9 | 32.9 | 32.9 | 32.9 |
| H: Bottom Bracket Drop | 4.7 | 4.5 | 4.5 | 4.5 | 4.5 |
| I: Standover Height | 63.7 | 64.4 | 67.2 | 66.8 | 69.8 |
| J: WHEELBASE | 110.1 | 111.8 | 114.9 | 117.9 | 120.5 |
| STACK | 40.5 cm | 41.5 cm | 44.0 cm | 46.0 cm | 48.5 cm |
| REACH | 41.0 | 42.5 | 45.0 | 47.5 | 49.5 |
*Effective seat tube angles are calculated at an average saddle height for each size frame.
Engineer's Corner
Get everything you need to know about the Mach 4 SL.
