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Pivot Mach 429 Trail Mountain Bike Frame - 2017

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Item # PIV001R

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  • Electric Blue, S ($2,499.00)
  • Electric Blue, M ($2,499.00)
  • Electric Blue, L ($2,499.00)
  • Electric Blue, XL ($2,499.00)
  • White, S ($2,499.00)
  • White, M ($2,499.00)
  • White, L ($2,499.00)
  • White, XL ($2,499.00)
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Reason to shred.

The Mach 429 Trail Mountain Bike Frame is an outspoken Luddite's dream. Pivot designed the frame to incorporate virtually every new speck of tech churned out by the industry in the latest wave of re-imagined standards, the shining star of which is definitely a Boost 148 rear hub. If you're into not being into the latest and greatest, then bikes like the Mach 429 Trail will give you reason to smile by letting you lord it retro atop your mid-90s frame, coil fork, and 26in wheels. But if you're into more stiffness, more versatility, and riding the ever-advancing wave of off-road tech, then the 429 Trail will give you reason to shred.

The frame itself begins life with Pivot's hollow-core internal molding process for uniform, controlled wall thicknesses and material distribution. This process virtually eliminates inconsistencies and resin pooling, increasing structural integrity while targeting areas for weight loss. The frame has a 67.5-degree head tube and relatively stubby chainstays, making it slack enough to challenge lines across rock gardens but nimble enough to pick its way through enduro-grade terrain — all while sticking climbs and roosting berms in the manner that made us fall in love with its immediate predecessor, the 429SL.

The 429 Trail's DW-Link suspension takes a handful of queues from Pivot's Mach 6 and Phoenix frames, teasing a depth out of the 116mm of travel that feels closer to a proper five-inch trail bike. The canny cyclist may spot elements of Pivot's DH clevis and enduro lower linkage in this model, but the completely new upper linkage translates those big-hit designs to the traction-focused language of a trail bike. By bringing the 429SL's small-bump compliance and race-worthy trail-contact into conversation with the Mach 6's terrain-erasing capabilities, the 429 Trail defines the crossroads where XC speed meets fearless, enduro aggression — especially when paired with the responsiveness and decreased deflection of the wider, Boost hub standard.

The Boost 148 rear axle standard allows for more width across the board: hub, chainstays, bottom bracket, and chassis. This makes for a shallower spoke angle, which considerably stiffens the 429 Trail's wagon wheels. It also accommodates wider pivot placement for longer life in the suspension bearings and a stiffer rear triangle. That extra width leaves room to slam the rear wheel up, too, shortening the chainstays for even more efficiency and dexterity. The externally routed cables make for easy maintenance, which we like, and also lower the bar for entry by reducing the manufacturing cost, which we like even more. In one final insult to Luddites everywhere, the added tire clearance also makes the 429 Trail compatible with 27.5+ tires.

Tech Specs

Frame Material:
carbon fiber
Wheel Size:
29 in, 27.5 + in
Rear Shock:
Rear Travel:
116 mm
Head Tube Diameter:
1.125 - 1.25 in tapered
Headset Included:
Bottom Bracket Type:
ISCG Tabs:
yes, ISCG 05
Front Derailleur Mount:
(not included) e-type Shimano side-swing only
Seatpost Diameter:
Rear Axle:
Boost 12 x 148mm
Recommended Use:
all-mountain, trail
Manufacturer Warranty:
3 years

sizing chart

Mach 429 size by rider height


Geometry chart


Geometry Chart


Mach 429 Trail

Seat Tube


Effective Top Tube






Stand Over

Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Height




S 16in 22.85in 23.91in 15.1in 28.54in 4in 67.5o 72.8o 13.19in 17.45in 43.7in
M 17.5in 23.9in 23.93in 16.11in 28.98in 4in 67.5o 72.8o 13.19in 17.45in 44.69in
L 19in 24.75in 24.59in 16.66in 29.29in 4.7in 67.5o 72.8o 13.19in 17.45in 45.47in
XL 20.5in 25.6in 25.71in 17.14in 30.04in 5.9in 67.5o 72.8o 13.19in 17.45in 46.46in

Reviews & Community


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29 or 27.5?

    This is one of the best all around bikes we offer. It can be set up as a 29 or a 27.5. The kit calculator may not give all available options for this bike to set up as a 27.5. If you need help configuring the bike feel free to reach out to me direct. I'm always happy to help!
    Wes Branham-Account Manager

    Make biking fun again!

    • Familiarity: I've used it several times

    I long for simpler days. I started mountain biking in the golden years, the mid 90's. I love to go out a shred basically anything out there. XC race, trail, resorts, it didn't matter, and I only had one bike.

    The Mach 429 Trail, my personal bike, brings that same feeling back. Light and efficient enough for single track and the occasional mid-week race or marathon but capable enough for full on trail duty. Boost hubs stiffen up the wheelset remarkably and there's enough travel for decent drops and fast descents.

    Hit me up directly if you would like to know more. 801-204-4557 btowery@backcountry.com

    Pivot 429 Trail 110/148 boost

      I bought this 429 trail in January from Competitive Cyclist and love it!! I have two sets of wheels 27.5 plus and 29 carbon which make the bike ride so much different. If I feel like hammering the down hills the 27.5 x 2.8 make the bike feel like it has 150mm's of travel and the 29ers make it feel more like a trail bike that does well in the climb. I have about 800 miles on it now and liking it even more....

      An Ultra-Capable 29er

      • Familiarity: I've used it several times

      I had the pleasure of riding the Mach 429 Trail on some rough and rocky singletrack in Park City, UT. I've been interested in this category of short travel 29ers with semi-slack geometry because they represent an evolution of bikes that blend highly efficient climbing and pedaling with very capable technical and downhill ability. 29" wheels have an advantage over 27.5" wheels because they roll over obstacles much easier and maintain their momentum better so that you can keep your speed up and maximize your pedaling efficiency. The disadvantage with 29ers, historically speaking, has been that they are much less playful and harder to maneuver on turns, tight sections, and jumps compared to smaller wheel sizes. They wheels tend to have a bit more flex to them as well.

      The Mach 429 Trail is a solution to this problem. The BOOST axle spacing has allowed Pivot to shorten the chainstays which gives the bike a snappy, playful feel. BOOST also improves the stiffness of the wheelset because of the wider axles. The DW-link suspension has a firm platform for pedaling and also gives you a lot of confidence when smashing rock gardens/rough sections because the rear end stays planted and doesn't bottom out. The 116mm of rear travel is deceiving because it feels bottomless. I didn't use all of the travel even when riding aggressively. The 67.5 degree head angle is just slack enough to promote stable handling yet keep the steering responsive. The geometry of this bike really allows you to charge hard both uphill and down. I wouldn't hesitate at all to dive into aggressive terrain; this bike can handle it and will allow you to ride obstacles you never thought you could. And yes, the bike climbs extremely well.

      Something really cool about this bike is that you can run it as a 27.5 plus setup, so really it has the potential of being 2 bikes in 1.

      Another note about this bike: Pivot has a specific method for setting suspension sag and the rear shock has an indicator for where you should have it set. Feel free to consult me as I have worked with Pivot on setting sag and know the process. It is highly important to have sag set correctly to take full advantage of this bike.

      In short, the 429 Trail is wonderfully refreshing face in the world of 29er trail bikes. Forget what you thought you knew about 29ers, this bike rips on all types of trails thanks to Pivot's modern geometry and brilliant suspension design. From all day cross country rides to short aggressive descents, the 429 Trail will eat it up and put a smile on your face.

      Feel free to give me a call or shoot me an email, I'd be happy to answer any questions you have about this bike. 801-746-7580 ext 4801 or brprice@backcountry.com

      Unanswered Question
      Avg. ride time: 1h 12m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      Two questions:
      Can an external dropper still be fitted?
      Will it work with a 140mm fork?

      Avg. ride time: 9h 41m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      The future of 29ers

      • Familiarity: I've put it through the wringer

      This is the bike I've been wanting for years. Built it up and rallied a few trails in St George last weekend and it's everything I'd hoped it'd be. Best of the 29er platform (fast, rolls over things easily) and mid-travel/mid-slack geometry (quick without being xc twitchy and able to deal with some sxxt without being more than you need). The 429 Trail is a riot. It's replaced last year's 429c in my quiver and I couldn't be happier.