Improving on the legacy of Pivot's iconic Mach 5.7 Carbon, the Mach 5.5 Carbon Pro XT/XTR 1x Complete Mountain Bike pushes the design envelope with progressive geometry that's longer, slacker, and lower than ever. It handles everything the trail throws your way, from chunky, rock-littered climbs to blistering descents with square-edge hits, sudden drops, and rock rolls just begging for action. Pivot places it firmly into the trail category, with a secondary focus on all-mountain exploration. To be blunt, we just call it "damn capable" and "stupid fun," making it a worthy rig for the aggressive rider demanding their bike to climb like a goat and descend with unflappable composure.
The Mach 5.5 Carbon retains the sought-after benefits of the DW-Link suspension platform, namely the ability to claw up the steepest, chunkiest climbs and soak up square-edge hits on the descent. Once you've reached the summit after a grueling climb, 5.5 inches of rear travel gobbles up loose rocks and smooths out square-edges at high speeds. It's all party up front, with 6 inches of travel providing the confidence to rally across anything in sight, including sections usually reserved for longer-travel enduro rigs. This 20-millimeter disparity between front and rear travel gives you a bit more efficiency for pedaling, but with extra plushness up front for cleaning notoriously technical sections of trail.
Seeing the industry is constantly evolving, it makes perfect sense to see the Mach 5.5 Carbon with a slacker, longer, and lower geometry for riders seeking a progressive trail bike that stays glued to the trail and retains stability at high speeds. The 66.5-degree head tube angle offers composure on high-speed descents, without being overly slack or wandering excessively on sustained climbs with steep, punchy sections. Just a tick shorter in the front than the notoriously long and slack Firebird, the Mach 5.5 Carbon's long top tube gives you ample cockpit room, which is especially welcome if you have a longer reach. This longer front end is complemented with snappy-short 16.93-inch chainstays. Shorter chainstays provide greater maneuverability for cleaning tight corners and uphill sections, as well as lifting the front up and over trail obstacles.
A few key details make the Mach 5.5 Carbon a truly stand-out trail bike. Delving into its carbon frame construction, Pivot employs their proprietary hollow core internal molding process with an optimized lay-up of high-modulus carbon for the lightest weight possible. This method produces a feathery-light frame (claimed as low as 5.7lb) that approaches Mach 429 SL Carbon territory, but with strength and stiffness similar to the enduro-bred Mach 6. In the rear triangle, both the seat and chainstays clear tires of 2.6 inches, which is a nice benefit for riders seeking the added bump compliance and cornering grip of high volume trail tires.
This particular build enjoys the shifting simplicity of Shimano's XT/XTR 1x11 drivetrain, with a 46t bail-out for spinning up steep climbs. The FOX 36 Factory fork is impressively stiff, lending precise tracking for picking apart rough sections of trail and plunging into steep descents. It's finished off with 35mm DT Swiss M1700 wheels rolling on 2.6-inch Maxxis Wide Trail tires for impressive traction and cornering confidence—without the significant weight penalty of a plus-sized tire.
- Pivot's new breed of quintessential trail bike weapons
- 5.5in of bump-gobbling, edge-smoothing DW-Link travel
- 6in up front help conquer rowdy descents
- Progressive trail geometry is longer, lower, slacker
- High-modulus carbon frame is lightweight and stiff
- Clears 2.6in Wide Trail tires for impressive traction
- Shimano XT/XTR 1x11 drivetrain with 46t bail-out cog
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Mach 4 size by rider height
|160mm Travel Fork|
Effective Top Tube
Head Tube Angle
Seat Tube Angle
Bottom Bracket Height
Reviews & Community
- Familiarity: I've used it once or twice and have initial impressions
This season Pivot wowed audiences with the release of the the Mach 5.5. Aimed at riders who spend most of their time following gravity, this machine excels when you point it down hill. However, the DW Link suspension design does prove to eliminate unnecessary sag when under pedaling load.
The geometry screams "on trend" and looks similar to a number of other bikes on the market in terms of head tube angle and chainstay length. Many people thought this was going to be a replacement for the Mach 6, but that is not the case. Pivot intends to keep that platform around for a bit and created the Mach 5.5 to be more stable huckster and rally machine on high speed descents.
Standing in the cockpit, the bike feels like it can take on about anything, without seeming overbuilt. I fit comfortably on a Medium, but opted to go Small (I am 5'6") since it feels a little more flickable and nimble. Perhaps I might go Medium if I were looking to employ it in a racing application.
Overall, I was very impressed with the performance of the Mach 5.5 and would like to spend more time with it.
You can reach out to me anytime :
801-736-6396 x 3596,
Or Sean W. on chat
One bike to rule them all
- Familiarity: I've used it several times
This is honestly the bike that comes the closest to a quiver killer that I have ever ridden. I had the chance to ride it down in Moab, UT which offers a pretty wide range of riding styles, from smooth and sandy to chunky, rocky climbs and descents.
What Martina said is absolutely true, this is a bike that I would consider to be the Switchblade's little brother. It is a bit more nimble and quick than the switchblade, which to me felt like a "smash through things at high speed" style bike. It is a 27.5 wheeled bike, so the smaller wheel creates a smaller gyroscopic effect which makes it feel easier to move from turn to turn and maneuver in the air. At the same time, it runs the new 2.6" width, which gets you a wider contact patch without all the extra volume of a full on plus tire. I noticed much more grip without the sometimes vague and wobbly feeling often felt with full on plus tires.
The DW link suspension is incredibly planted and confident feeling, and feels nice and progressive with a solid ramp up to prevent bottom out on big hits. The way the rear triangle and links are designed lends an incredible amount of lateral stiffness, and prevents the rear end from feeling vague or flexy.
The slack headtube angle of 66.5 degrees combined with the sub 17 inch chainstays makes for a bike that is relatively easy to get the front end up for manuals or log hops. At the same time, the steepish seat angle of 73.5 degrees prevents front end lift on steep climbs, I did not find myself needing to get way over the front end on techy climbs. Running a Fox 36 fork with 160 travel, I was worried it would feel unbalanced, but I was 100% surprised in that it feels perfectly balanced, and having the extra squish in the front end really lets you open the bike up and hit things with reckless abandon.
Overall, the bike felt incredibly planted, confidence inspiring, and somehow still efficient. I'd highly recommend this bike to anyone looking for a true all mountain bike that pedals well, but still descends pretty much anything you could throw at it. I'm really strongly considering it as the next bike to add to my stable.
Please feel free to reach out to me any time, I would be happy to help out with questions or pricing on any of these bikes. 801.736.6396x2344
Truly an anything bike
- Familiarity: I've used it once or twice and have initial impressions
I was lucky enough to ride the new Mach 5.5 down in Moab, and have nothing but good thing to say about this bike. It's like the Switchblade's little brother, bombproof, stable, and solid, but a little more playful.
It's built solely on a 27.5 platform, as opposed to the 29/27.5+ of the Switchblade, but you can still run up to a 2.6" tire on the Mach 5.5, so you've still got the super grippy larger tire setup for running low PSI and cornering banked turns like a boss.
The suspension on this bike is designed in such a way that it has great square bump compliance, but still responds incredibly well to long climbs, big power moves, and technical and rocky descents. Long and low geometry combined with 27.5 wheels make this bike super nimble for quick corners and climbing, but without compromising it's descent. Collectively, this is an incredibly fun bike with just the right amount of stability and playfulness.
I'm definitely thinking this will be my next bike.