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Mach 4 SL Pro XT/XTR 120 Carbon Wheel Mountain Bike

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Why We Like The Pivot Mach 4 SL Pro XT/XTR 120 Carbon Wheel Mountain Bike

Slated for cross-country riding and racing, the Mach 4 SL Pro XT/XTR 120 Carbon Wheel Mountain Bike from Pivot is one of our short travel go-to options. The 100mm of rear travel is powered by DW-Link, which is one of our favorite rear linkage designs for its predictable tracking in uneven terrain. The Mach 4 SL is extremely efficient thanks to its steep 67.5-degree head tube angle, which provides reactive steering characteristics and an efficient position for pedaling out of the saddle. The Fox StepCast 34 fork provides 120mm of travel to stand up to increasingly demanding modern XC courses, and it features a remote for on-the-fly lockout control. The Mach 4 SL rolls on 29in wheels for their ability to carry momentum over long sprints, and their enhanced rollover capabilities that come in handy for rock steps and off-camber roots.

This XT/XTR Pro build packs impressive value, starting out with a hybrid 12-speed drivetrain that strikes the perfect balance between being lightweight, durable, and affordable. The Reynolds Blacklabel XC wheels are another build highlight, with lightweight carbon construction that enhances the bike's acceleration without compromising strength. Shimano XT brakes provide the instant bite point that they are so well known for, while Maxxis Rekon Race tires keep things fast-rolling and efficient. This high-performance build is perfectly suited to the cross-country racer, or for the trail rider who prioritizes efficiency and speed.

*Due to a high demand in the global supply chain and bike industry since the start of the pandemic, material weight and exact components are subject to change. We are working diligently to keep tech specs updated, and any adjustments will be of equal or better spec level. If you have any questions, reach out to a Gearhead by chatting online or calling 1-888-276-7130.


  • Zippy cross-country bike with a race-ready build
  • 100mm of DW-Link rear travel pedals well yet softens the hits
  • Fox Factory StepCast 34 FIT4 with 120mm of travel
  • Carbon frame is lightweight for quick acceleration
  • Shimano XT/XTR hybrid drivetrain supplies reliable shifting
  • Fox Factory DPS provides lots of adjustment points
  • Reynolds Blacklabel XC carbon wheels are light and responsive
  • Integrated remote lets you lock out your fork travel on-the-fly
  • Item #PIV1WY9
Frame Material
Rear Shock
Fox Factory DPS
Rear Travel
Fox Factory Stepcast 34 FIT4, handlebar remote, 44mm offset
Front Travel
Pivot Precision Sealed Integrated Cartridge
Shimano XT M8100 ISPEC EV 12-speed
Rear Derailleur
Shimano XTR M9100 SGS, 12-speed
ISCG-05, 2 tabs
Race Face Aeffect R
Chainring Sizes
Crank Arm Length
[x-small, small] 170mm, [medium, large, x-large] 175mm
Bottom Bracket
Shimano PF92
Shimano XT M8100
Cassette Range
Shimano CN-M8100, 12-speed
Shimano XT M8100
Brake Type
2-piston hydraulic disc
[front, rear] Shimano XT Centerlock, 160mm
Phoenix Team Flat Carbon
Handlebar Width
Phoenix Factory Lock-On
Phoenix Team XC/Trail
Stem Length
Phoenix WTB Pro Volt (narrow width)
Fox Transfer Factory Series
Seatpost Travel
[x-small] 100mm, [small, medium, large] 125mm, [x-large] 150mm
Reynolds Blacklabel XC
Industry Nine Hydra
Front Axle
15 x 110mm Boost
Rear Axle
12 x 148mm Boost
Tire Clearance
29 x 2.4in
[front] Maxxis Rekon Race, EXO, [rear] Maxxis Rekon Race, EXO
Tire Size
[front, rear] 29 x 2.4in
not included
downtube protector, chainstay protector, Pivot tool dock compatibility
Manufacturer Warranty
[frame] 10 years

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