Mach 4 Carbon V2

Race Tested. Trail Proven.

The Mach 4 Carbon offers the perfect balance of speed and nimble handling. Like its bigger-wheeled sibling, the 429SL, the Mach 4 is a demon on any cross-country racecourse—proven in both the Olympics and on the World Cup circuit. But with a bit more suspension travel, mid-size 27.5 wheels and a shorter wheelbase, the Mach 4 Carbon possesses a playfulness that makes it a blisteringly fast trail bike.

Rear Travel

Rear Travel

Wheel Size

Wheel Size





Quality Craftsmanship

We strive to build the best-performing cycling products in the world.

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Part 6

Geometry & Sizing

We strive to build the best-performing cycling products in the world.

Geometry image


Read the latest on the Mach 4 Carbon V2.

Engineer's Corner

Get everything you need to know about the bikename.

Full carbon frame featuring leading-edge carbon fiber materials and Pivot’s proprietary hollow-core, internal molding technology

Frame weight from 5.1lbs (2.3Kg) - Complete bikes weighing sub-22lb (10kg)

115mm of smooth-yet-efficient dw-link® suspension with race and trail tuning X-Small size features 100mm travel - See FAQ tab for more information

Available in either trail-oriented or XC racing-focused complete bike builds

Accommodates tires up to 27.5x2.6”

Fits riders between 4’11” to 6’3”+

X-small size features more stand-over clearance than any 27.5" suspension bike made

Hassle-free, full-length, internal cable routing - Di2 Compatible

Custom tuned Fox Float DPS Kashima rear shock

2 sets of bottle cage mounts

Small Parts Schematic Save tech spec
Dropper Fit Guide Save tech spec
Di2 Schematic Save tech spec
Suspension Setup Guide Save tech spec
Pivot Owner's Manual Save tech spec

To ensure the best sizing, we recommend that you visit your local Pivot dealer to get a professional fit and refer to our geometry chart to check your measurements. However, we can provide a rough guideline: 
X-Small: 4'10" – 5’5”
Small: 5'4" – 5’8”
Medium: 5'7” – 5’10"
Large: 5'10” – 6’0”
Large (long): 5'10"- 6'3"

The Large long version of the Mach 4 offers a longer reach measurement than the standard large while fitting a similar to slightly taller height range as the standard large frame. With the Mach 4’s very low stand-over height, and excellent trail bike performance, many riders are stepping up a frame size to get a longer front center which works well for more technical terrain with a shorter stem. This meant that even some riders just under 6’ were left without a perfect option so we added this additional size. This puts the reach measurement of the large long Mach 4 close to that of the new Switchblade. Please visit your local dealer or call one of our Pivot Customer Service Representatives at 877.85.PIVOT if you have any questions regarding what size Mach 4 Carbon is best for you.

Variables in frame size, discrepancies in scale calibrations, and method of weighing (with or without pedals and such) all lead to inaccurate comparisons, so we choose not to publish our bike weights. Pivot bicycles are among the lightest available, but the weight is only one of many factors that make a great bicycle. Other aspects such as frame stiffness, strength, durability, and ride quality are just as important as weight to our engineers when designing our Hollow Core Carbon and aluminum frames. Instead of comparing grams online, we suggest you visit your local Pivot dealer and see our attention to detail, smart, high value spec, and class leading features. Bring a scale if you’d like, but take just one demo ride and you’ll feel why Pivot Cycles are the most well-rounded, highest performing bicycles on the market and in many cases, yes, it’s the lightest as well.

Yes, internally dropper posts are compatible with the Mach 4 Carbon.

The Mach 4 Carbon features a low stand-over height, and short seat tubes allow the use of longer travel dropper posts and/or more flexibility for a wider range of rider sizes.

There are limitations that each dropper post have for each frame size based on the individual rider’s saddle height, so it is important to check fit before choosing the travel and model of dropper post for your Mach 4 Carbon. Use the Dropper Fit Guide under the Tech Specs to find the right post for your bike.

We make it easy to get the best ride out of your Pivot bike with a simple sag indicator already installed on your bike, and this follow-along video featuring our own Bernard Kerr:

Yes, the Mach 4 Carbon was designed to clear a large water bottle on top of the down tube. For best clearance, we suggest removing the rear shock and swapping the spacer hardware from front to rear. Re-install the shock with the air can side facing the rear triangle and the compression/rebound adjuster facing down, away from the top tube. This will open up the clearance significantly at the front, allowing easy access to larger bottles. This is the setup that all of our racers run, and we designed the frame to be run with a flipped shock for those wanting to use large bottles.

We also include a spacer to be placed under the upper water bottle cage mount that changes the angle of the water bottle cage enough to provide the extra clearance required to prevent a large water bottle from rubbing against the down tube.

The Mach 4 Carbon uses Boost 148mm x 12mm hub/wheel spacing. This hub design has wider flanges, so you cannot change the end caps to convert an existing 135mm, 142mm, 150mm, or 157mm hub.

Pivot uses a 1.5 thread pitch on the rear thru axle - these can be purchased on our online store.


34.9mm (or 35mm as some manufacturers call it)

A high direct mount (DM) side swing front derailleur only - Shimano produces the side-swing front derailleur in Deore & SLX for 10-speed drivetrains and XT & XTR for 11-speed drivetrains.

You can fit a 2.6" tire on the Mach 4 Carbon, depending on the rim width. 

All cranks designed for the Boost system and use a Pressfit BB92 bottom bracket will work on your Mach 4 Carbon. 

Pressfit BB92

You can use non-Boost:
Race Face Next SL 1x cranks
Shimano XT and XTR 1x11 cranks (with 30t or 32t)
Shimano XT and XTR 2x11 cranks (with 24t/34t or 26t,36t)

There may be other 2x non-Boost cranksets available that will work, though it will depend on the chainline and chainring size. If the chainline is not out far enough, the front derailleur clearance may be tight when shifting into the small ring - the front derailleur mount has been shifted outwards to accommodate the Boost design.

163mm is the narrowest Q-factor measurement that the Mach 4 Carbon will accept.

Zero stack (ZS) 44mm top and ZS 56mm bottom (or a Chris King Inset 2)


No rear brake adapter is needed for a 160mm rotor. If you would like to put a 180mm rotor on, you will need a direct mount post-to-post adapter. 

The Mach 4 Carbon was designed for fork lengths between 100mm-130mm. 


For the extra small size -
eye-to-eye: 6.5"
stroke: 1.5"

For all other sizes - 
eye-to-eye: 7.25"
stroke: 1.75"

You'll need the proper shock mounting hardware. For the front of the shock, the hardware is 8mm x 22mm. For the rear of the shock, the hardware is 8mm x 36mm.

Additionally, we designed the frame around a standard air can volume size with light to medium compression valving and light rebound valving.

During development, we found that 100mm of travel allowed us to get the best combination of stand over clearance, rider fitment, and shock tune for the target height/weight of an extra small rider.

A detailed PDF of the torque specs can be found in the Tech Specs documents.