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Pivot Mach 5.5 Carbon Factory Float X2 Mountain Bike Frame - 2018

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Item # PIV004N

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  • Black/Blue Accents, XS ($3,498.00)
  • Black/Blue Accents, S ($3,498.00)
  • Black/Blue Accents, M ($3,498.00)
  • Black/Blue Accents, L ($3,498.00)
  • Black/Blue Accents, XL ($3,498.00)
  • Satin Red, XS ($3,498.00)
  • Satin Red, S ($3,498.00)
  • Satin Red, M ($3,498.00)
  • Satin Red, L ($3,498.00)
  • Satin Red, XL ($3,498.00)
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A wild steed to tame.

If we were to try to summarize the 2018 Pivot Mach 5.5 Carbon Mountain Bike Frame with Factory Float X2 shock, we'd say it's little bit free-form, a little wild, and a whole lot of fun. It finds its playfulness by pushing the design envelope with progressive geometry that's longer, slacker, and lower than ever. It handles everything the trail throws your way, from chunky, blistering climbs, to long and wily descents, littered with rocks and square-edge hits, sudden drops, and rock rolls just begging for action. Pivot places it firmly into the enduro 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 slack head tube and surprisingly deep-feeling travel reward aggression in chunky stuff, but our favorite part of the bike may be the rear triangle. Or rather, it's what's happening between the rear and front triangles; DW-Link may never have shined brighter than on the Mach 5.5. It combines the same pivot cartridge bearing featured on models like the Phoenix, but it ditches the clevis altogether. That makes for less weight, a tighter back end, and a light-off-the-top feel that stays glued to the trail—a trait only enhanced by the addition of mid-plus tires and a steep seat tube. This plush feel is combined with an upgraded Fox Float X2 rear shock, which features Evol technology, increasing sensitivity of the shock when you're pedaling over small roots and rocks for a smoother feel, without compromising on the get-up and go when you're putting down the power. We expect a bike with such a long cockpit and a 66.5-degree head tube angle to leave us stoked on descents, but the traction on loose and rocky climbs from the suspension and tire clearance mean that it makes us just as happy while earning our laps.

  • An enduro rig that rallies up climbs and charges down steeps
  • 5.5in of DW-Link suspension with light-off-the-top DH pedigree
  • Upgraded Float X2 shock increases sensitivity with EVOL technology
  • Removable front derailleur mount tidies up a one-by
  • Longer, lower geometry than the Mach 6
  • Steep seat tube and stubby stays keep climbing on point
  • Boost spacing stiffens the rear wheel and allows truncated stays
  • Pivot's carbon expertise protected by rubber frame guards
  • Clears 2.6in tires and a full-sized water bottle in the front triangle

Tech Specs

Frame Material:
carbon fiber
Wheel Size:
Rear Shock:
Fox Float X2
Rear Travel:
Fork Travel:
[recommended] 160mm
Head Tube Diameter:
zero-stack 44/56mm
Headset Included:
Bottom Bracket Type:
ISCG Tabs:
Cable Routing:
internal, mechanical, Di2
Front Derailleur Mount:
Brake Type:
Seatpost Diameter:
Seat Collar:
Rear Axle:
12 x 148mm Boost
Recommended Use:
enduro, trail
Manufacturer Warranty:
10 years



Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[frame and shock] 5lb 3.2oz

More Mach 5.7 builds

Geometry Chart


Mach 5.5
160mm Travel Fork

Seat Tube

Effective Top Tube



Stand Over

Head Tube

Head Tube Angle

Seat Tube Angle

Bottom Bracket Height

Bottom Bracket Drop


XS 14in 21.96in 22.93in 15.35in 27in 3.54in 66.5° 73.8° 13.4in   16.93in 43.95in
S 15.5in 22.99in 23.48in 16.14in 27.18in 4.13in 66.5° 73.5° 13.4in   16.93in 44.98in
M 16.75in 24.28in 23.84in 17.32in 27.2in 4.53in 66.5° 73.5° 13.4in   16.93in 46.32in
L 18in 25.17in 24.21in 18.11in 27.23in 4.92in 66.5° 73.5° 13.4in   16.93in 47.26in
XL 19.5in 26.26in 24.58in 19.09in 28in 5.31in 66.5° 73.5° 13.4in   16.93in 48.4in

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