2019 Eminent Onset LT Advanced Bike

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International shipping available. Some exclusions apply.
The New Eminent Onset 29er - Does the Bite Match the Bark?
Eminent's second bike offering proves to be planted and ready for speed.
Vital Review
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Small builders have a tough time breaking into today’s modern carbon frame market. Bike creation requires engineering know-how, manufacturing expertise, and typically an interest in fabricating in Asia, where nearly all carbon frames are made. The next challenge is selling your newest creation in an increasingly competitive US market and doing battle with some really big, established brands. One such company that is proving itself as a small boutique bike builder is Eminent. In its second year of production, Eminent has just released its second model—a 29-inch-wheeled all-mountain machine dubbed the Onset.

-By Alan Davis

Lots of bikes roll through the halls at Vital, but very few elicit such a stop-you-in-your-tracks reaction as Eminent. The bikes just look unique. They feature radical design elements like angular tubing, a sloping top tube that aligns perfectly with the rear seat stays, a floating rear shock that bisects a forked seat tube, plus aggressive, square styling and gussets at every turn. The new Onset is one of the most different-looking suspension frames that we’ve seen in a while. The Onset also made us question if the bike had a ride that matched its aggressive looks or was it just an exercise in industrial design.

A Day at Eminent

To answer our question, we spent a day with Eminent’s owner, Jeff Soncrant, as he handed us his newest creation. Jeff honed his engineering knowledge in the automotive industry. But love for riding bikes and a stint at Easton-Bell Sports dialing in their product development cycle got him thinking about how to build a better full-suspension frame and ultimately how to deliver it to your door. Here is the short version of how Eminent came to be.

Soncrant tells us, “In between jobs after Easton-Bell, I sketched this frame, and then I prototyped it and we rode it for like a year. We really liked the way the suspension worked and it was sticking to the ground well. We were up in Santa Cruz at the time and were like, ‘let's move this forward!’ So I put a business plan together, acquired a partner and investors, and we started down that road. We wanted a good suspension platform that worked well and didn’t have any weird wallops going down or up—out of the saddle or in the saddle. Then it was like ‘OK now how can we make the bike look good?’ and ‘How can we deliver the value proposition for the customer?’ So, we came up with our direct-to-consumer pricing to the best of our ability. We then packaged it in a consumer-friendly box where basically only the front wheel and the handlebars are uninstalled. You get a multi-tool and a torque wrench, and you’re able to set the bike up in 15 minutes and go for a ride.”

Eminent's AFS (Active Float Suspension) System

The conversation quickly turned to suspension, as Eminent uses a fairly unique design that they call AFS (Active Float System).

“A lot of the bikes I was riding had a lot of rear end flex,” Soncrant explained. “They weren’t laterally stiff. A lot of them have linkages right here (he points right in front of the rear tire, behind the seat collar). I was like ‘if I could move that pivot as close to the rear axle as possible, then I would have the least amount of lateral play from a tolerance stack-up right from the beginning.’ The singular rocker arm would allow me a quick and responsive system with the shock. I also wanted a four-bar design so I could control the axle path. The last thing that came was the floating brake bracket. I wanted to eliminate brake jack and move the brake forces away from coupling with the suspension forces, so I moved that down to the chainstay. It just creates a platform that gives you a lot of control on the bike when you are going fast, grabbing on the brakes and doing whatever it is you need to do.”

As unique as AFS is, we couldn’t help but think, "‘Doesn’t it look like an updated Lawwill design (Yeti DH-8 or Rotec RL9)?’"

Soncrant replied, “I had to do a bunch of research once my buddy was like, ‘that’s a Lawwill!’ So I had to go online and find out where Lawwill originated and do the patent research and find out that Erik Buell created it, but that I had changed it from what it was. I looked at the Buell patent, the Lawwill patent and asked, is it current? Is it expired? Have I improved it? Can I re-apply for it? Now we have applied for our own patent that identifies the pivot locations, floating brake, shock attachment, and other characteristics. It is under review with the USPTO, and I am sure it will take another few years to move through the process.”

Onset Suspension Analysis

Using the bike industry's leading linkage analysis software, André Santos was able to determine a close approximation of each bike's kinematics for the purpose of this comparison. Though they don't always tell the full story, these charts provide great insight into several key factors that impact how the bikes ride.

André's Observations

  • The Onset has a relatively linear suspension design, with about 7% progressivity. For more aggressive use you might need to add a volume spacer to prevent bottom outs.
  • Anti-squat values are relatively high for a 30-tooth chainring (around 150% on the middle cassette cog). This can provide a firmer suspension platform under heavy pedaling. As a downside, the amount of chaingrowth is relatively higher compared to other trail/enduro bikes.
  • The rear brake caliper is cleverly mounted in a floating brake attached to the chainstay. As a consequence, the rotation of the brake caliper around the disc is low when the suspension cycles through the travel. Therefore, the suspension is relatively independent from braking forces (low anti-rise). The floating brake is necessary to avoid brake jack on this suspension design.
  • Overall, the Eminent Onset uses a Lawwill-like design without the brake-jack problem, and combines great pedaling efficiency with relatively linear suspension.

What About Looks?

We also had to ask Jeff about those square tubes. He says, “between my partner and I, we built collateral boards—to create an image or feel for what you would like the identity of your brand and bikes to be. And so our boards had KTM RC8s, fighter jets, Lamborghinis, and hard-line Ferraris. We really started to identify with that modern, fast look. We built that board with our industrial designer and he started sketching to it. The characteristics of our bikes going forward right now are the consistent top tube, the design feature around the dropout, the design feature on the head tube and the non-round tubes. We feel that the non-round tubes look more modern compared to round tubes; we want something more unique.”

The Onset Frame

The Onset frame, like the Haste frame, is constructed of unidirectional carbon fiber throughout, fabricated using an EPS mandrel on the inside, covered in latex and mold release before being wrapped with carbon. The process creates a carbon tube that is very high quality, smooth inside and out. The floating rear dropouts, chainstays, and linkage (seatstays) are made of the same carbon material. The pivots use IGUS bushings in low rotation pivot points (15-degrees or less) at the brake bracket and lower shock mount. You’ll find sealed Enduro brand angular contact bearings are used elsewhere to handle lateral forces. Titanium shock bolts save a bit of weight and tubed internal cable routing is used throughout for easy maintenance and no noise. The Onset frame is offered in sizes small, medium and large.

Compared to the Haste, the new Onset has different head and seat tube angles, as well as a less rearward axle path. The reduction in rearward axle path was necessary to achieve the desired anti-squat and leverage ratio curve that Jeff wanted. The Onset suspension is also slightly smoother than the Haste, as it does away with some pivot washers that needed a break-in period on the Haste.

Taking a closer look at the geometry specs, our size medium 140 Advanced model has a 66-degree head angle and a 75-degree seat angle. It sports a 23.66-inch top tube, a 17.01-inch reach, and a 46.73-inch wheelbase. All the frame sizes have 17.4-inch chainstays and a 13.27-inch high bottom bracket. The numbers are pretty well centered in the mid-travel, 29er, all-mountain market right now, but they could be considered long, low and slack with a steep seat angle.

Two Travel Options

Broadening the appeal of the Onset, Eminent is offering the bike in two different travels—140mm and 120mm. The only difference in the frame is the rear shock and the linkage. The ST builds see shorter travel 130mm forks, dual-piston brakes, narrower rims, and tires, plus the head and seat angles are about a degree steeper.

Three Build Options

Good, better and best builds cover a broad range of budgets starting with 11-speed Shimano SLX, 11-speed Shimano XT and, hopefully, by the end of the year, the top-end 12-speed Shimano XTR. The bike that we’ve been riding is the middle 140 Advanced offering with 11-speed Shimano XT, DT Swiss M1700 wheels, FOX 36 150mm Elite Fit 4 fork and Float DPX2 rear shock. Other tasty bits include an MRP chainguide, KS LEV dropper post, Acros Blocklock headset, and Maxxis Minion DHF/DHR II 29 x 2.5-inch tires.

Buying an Eminent bike is simple. The consumer-direct model that they introduced last year has been expanded upon and a dealer network has been added. You can still get an Onset delivered to your door, but if you prefer to check a bike out through a shop or at a demo, there are several to choose from and more on the way.

On The Trail

Getting past the looks of the bike, our initial impression of the new Onset is that of balanced stability. Its long wheelbase and centered stance combined with the steep seat angle never makes the cockpit feel too stretched out. The bike is a little heavy compared to some others in this travel category. Ours weighs in a hair over 33 pounds after we converted the tires to tubeless. On the trail, however, the weight became less of a concern as the suspension, combined with 29-inch wheels, flowed over everything that came in our way.

Our first ride with the Onset sent us 2,000 feet up a mountain and back down again on a backcountry adventure ride. The Onset's intended purpose is not to be a long-haul ascender, but wow, we were surprised by how well it climbs! Whether slogging up long fire roads or smashing up rocky steps, the Onset was sure-footed and capable. When the trail turned downward, things got even better. Stability was incredible regardless of how precariously exposed the trail happens to be—the best word that describes the ride is "planted." We clipped some rocks with our pedals here and there. Some might call the bottom bracket height a little low, but we’ve always been OK with sacrificing some pedal clearance for good cornering.

The next ride tackled a wide range of rocky steeps, including drops and lots of technical features. The Onset is one of the most confident all-mountain bikes we’ve ever ridden descending steep, sketchy lines. It even took some getting used to, as a result. Trails that normally bounce and buck can be ridden faster than we expected and we had to learn to trust it. Manual into rocky steps, brake through a chunky turn, dive into off-camber lines—the Onset doesn’t flinch.

Stiffness is exceptional. Although the Onset may weigh a little more, that extra weight feels like it’s being put to good use as this frame feels absolutely solid. Maxxis 2.5 DHR/F tires, 200/180mm rotors, and XT four-piston calipers certainly let you push the extreme too; these key control points don’t hold anything back and let the frame do its thing.

Looking at the rear AFS suspension, the rear triangle has the floating axle and the floating shock, making an almost perfect parallelogram. Jeff has worked his engineering magic, calculating the best anti-squat and compression ratio so that the rear triangle is very isolated from the front and, more importantly, from the rider. It just sits back and does its job absorbing impacts and tracking straight.

If the Onset has a weakness, we’d say it was on the flatter sections of trail. Standing and pedaling over flat terrain with jumps or rocks did not yield a poppy, playful ride for bike flicking. The bike’s weight, size, and planted feel require more effort to jump around. This bike was designed to go fast and maintain traction and contact with the trail. The Onset shines in the mountains, on enduro courses, in bike parks or on your local gravity trail. Its traction characteristics are so good, it’s a shame to ride it somewhere that doesn’t push that envelope.

What’s The Bottom Line?

The Eminent Onset looks radical; it’s not for the squeamish that’s for sure. But looks can be deceiving, so we have been really impressed to find that the ride does, in fact, measure up to the appearance. The steeper the trail gets, the more we enjoyed riding the Onset. It has a stable, planted feel that truly shines on rough trails—going up or down. Jeff Soncrant should be proud of his creation. We just hope enough riders take notice of his unique bikes and help Eminent grow in a market that gets more crowded and competitive every day.

Vital MTB's First Ride Rating

  • Climbing: 4 stars – Excellent
  • Descending: 4.5 stars – Outstanding
  • Fun Factor: 4 stars – Excellent
  • Value: 4 stars – Excellent
  • Overall Impression: 4.5 stars – Outstanding

Eminent Onset 140 Advanced Specs

  • PRICE: $5,199 (as tested - 140 Advanced)
  • WEIGHT: 33.01 lbs as ridden (with tubeless tires)
  • SIZES: S, M, L
  • COLORS: Black/Grey, Light Grey/Orange
  • CONTACT: eminentcycles.com
  • BRAKE Shimano XT 200mm/180mm
  • CASSETTE: Shimano XT 11-Speed
  • CRANKSET: Shimano XT
  • FORK: Fox Float 36 Elite Fit 4 150mm
  • FRAME: Unidirectional Carbon Fiber
  • HANDLEBAR: Pro Taper Carbon 810mm
  • HEADSET: Acros Block Lock
  • HUBS F/R: DT Swiss
  • RIMS: DT Swiss M1700
  • SADDLE: WTB Volt Pro
  • SHIFTERS: Shimano XT
  • SHOCK: Fox Float DPX2
  • STEM: Valiant 50mm
  • TIRES: Maxxis Minion DHF/DHR II 29-inch

To learn more about the Eminent Onset trail bike, visit www.eminentcycles.com


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Eminent Onset LT Advanced Bike
Model Year
Riding Type
Enduro / All-Mountain
Sizes and Geometry
Wheel Size
Frame Material
Carbon Fiber
Frame Material Details
Unidirectional carbon layup, carbon down tube guard, internal cable routing with internal carbon tubes
Rear Travel
Rear Shock
FOX Float PDX Performance Elite, 210x55, 3-position adjust, EVOL LV
FOX 36 Float 29 Performance Elite, FIT4, 15x110mm, 44mm offset
Fork Travel
Head Tube Diameter
Acros Block Lock stainless steel
Answer Pro Taper Carbon, 810mm width, 12mm rise
Valiant, 50mm
Lizard Skins Charger EVO
Shimano XT with Shimano SLX rotors
Brake Levers
Shimano XT
Shimano XT SL-M8000, 11-speed
Front Derailleur
Rear Derailleur
Shimano XT M8000 SGS 11-speed
MRP 1x CS, 26-38 tooth
Shimano XT M8000
Shimano XT, 30 tooth
Bottom Bracket
Shimano XT
None included
Shimano XT HG700 11-speed
Shimano XT M8000, 10-51 tooth
DT Swiss M1700 wheels, 30mm
DT Swiss M1700 wheels
DT Swiss M1700 wheels
Front: Maxxis Minion DHF 29" x 2.5"
Rear: Maxxis Minion DHR II 29" x 2.3"
WTB Volt Pro
KS LEV, 150mm travel, with under-bar mount
Seatpost Diameter
Seatpost Clamp
Rear Dropout / Hub Dimensions
Boost with DT Swiss axls
Max. Tire Size
Bottle Cage Mounts
Grey/Orange/Gloss or Black/Grey/Satin
5-year frame warranty
33 lb 0 oz (14,969 g)
AFS (active floating suspension) design with floating brake, floating shock, and long rocker
Angular contact bearings capable of side and vertical loading
Removable headset cups for brand and adjustability options
Included: Topeak Hexus II torque tool and 5 Nm torque box; Valiant shock pump
What do you think?
Where To Buy
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.

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