Sonora X0

Weight 10.1 kg
Sizes  29" - 16", 18", 20", 22"
Frame Carbon SL HMF
Color(s) Slate Grey

Pricing

recomm. retail price
3 499.00 €

This Is What You Get …

... when STEVENS designs a racing machine for ambitious marathon riders on big 29" wheels: A top of the line carbon monocoque frame. Partnered with components that easily take the pounding of a full racing season - from Sram's full XO1 Eagle DUB 1x12-speed drivetrain and the super-light Fox Step Cast suspension fork to the shiny DT Swiss wheels and powerful Shimano Deore XT disc brakes. Altogether weighing in at only 10.1kg. In short: Sonora XO.

  • Updated carbon hardtail with first-class frame details and World Cup worthy handling
  • Lightweight Fox 32 Float Step Cast suspension fork w/ lockout remote control
  • Full Sram X01 Eagle DUB 1x12-speed drivetrain
  • DT Swiss 29" wheels with boost axle standard
  • Fast tires: Schwalbe Racing Ray / Racing Ralph

Equipment

Details

Chassis

Frame
Carbon SL HMF
  • Double Chamber Technology
  • O.L.D.: 148 mm
  • Brake: postmount disc 6"
  • BB: Pressfit 92
  • Front derailleur mount: direct mount (high)
  • Cable routing: intern
Front fork
Fox 32 Float SC Performance
  • Step Cast technology
  • Travel: 100 mm
  • Air suspension
  • Remote Lockout
  • Tapered Steerer 1 1/8" - 1 1/2"
  • O.L.D.: 110 mm
  • Brake: postmount disc 6"
Headset
STEVENS Race Taper 1 1/8"-1 1/2"
  • Upper bearing cup: IS42/28.6
  • Lower bearing cup: IS52/40
Brakes
Shimano Deore XT
  • BR-M8100
  • Hydraulic disc brake
  • Rotor: SM-MT800
  • Rotor size: 180/160 mm
  • Center-Lock

Drivetrain

Crankset
Sram X01 Eagle B DUB Carbon
  • 34 T
  • BB type: Press Fit MTB 89/92 mm / 29 mm
  • Boost chain line
Derailleur r
Sram X01 Eagle
  • 12-speed
  • Type-3 Roller Bearing Clutch™
  • Cage Lock™
  • Total capacity: 40 T
Chain
Sram X01 Eagle
Cassette
Sram XG 1275 Eagle
  • 12-speed
  • Combination: 10-12-14-16-18-21-24-28-32-36-42-50 T
Gear ratio
Zoom 1.58 - 7.89 m, 1*12

Wheelset

System wheelset
DT Swiss X 1900 Spline
  • Axle: QR15x110/12x148 mm
Tires
Schwalbe Racing Ray | Racing Ralph Evolution
  • Tire size: 57-622
  • Foldable
  • Addix Speed compound
  • SnakeSkin

Cockpit

Handlebar
Oxygen Scorpo MTB
  • Width: 700 mm
  • Backsweep: 7°
  • Rise: 11 mm
  • Clamp: 31.8 mm
Stem
Oxygen Scorpo MTB
  • Handlebar clamp: 31.8 mm
  • Angle: 5°
Saddle
Oxygen Roccia
Seatpost
Oxygen Scorpo MTB
  • Length: 380 mm
  • Diameter: 30.9 mm
  • Insertion depth: min. 100 mm
Shiftlever
Sram X01 Eagle Trigger
  • 12-speed
Brakelever
Shimano Deore XT
  • BL-M8100
  • 2 finger

Data

Weight
10.1 kg
Sizes
29" - 16", 18", 20", 22"
Color(s)
Slate Grey
Laden weight
115 kg
  • Bike incl. rider, clothing and luggage
 

Technology

True monocoque frame

True monocoque frame: The STEVENS Sonora

True monocoque frame To make this frame, all carbon fibre mats are placed in ONE mould and then "baked" with the resin matrix to form a premium frame. Only with this one-piece design all the advantages of carbon as a frame material can be exploited: perfect design for the actual loads, optimum power flow from the head tube via the main frame and seat and chain stays to the rear wheel - and all this with minimum material requirements (= weight!). Many carbon frames on the market are instead assembled from several pieces.

Boost-Standard Fork

What is right for the rear wheel is even more important at the front wheel - because steering precision matters. This is why STEVENS uses suspension forks and hubs with extra wide axle spacing for this bike. These 110mm of axle spacing are called "Boost" or "Plus" and stand for lots of added lateral stiffness plus space for extra wide studded tires.

Boost Rear Axle Spacing

This bike adheres to the "Boost" standard with 148 mm axle spacing. And there are good reasons for that. Rear wheel stiffness increases by 20 % which is especially beneficial in large 29" wheels. And there is more space for voluminous studded tires to give you more control and fun an the trail.

High Modulus Carbon Fibers

Only the very best materials are used for the highest quality STEVENS carbon frames - so called high modulus carbon fibres. They offer a perfect combination of maximum toughness and targeted elasticity. This way they provide maximum lateral stiffness for best forward drive and a high amount of comfort. Result: incredibly light and enormously stiff frames.

Versatile cable routing

We keep the cable routing on our bikes as versatile as possible so you can ride your bike like you want to. There are wide and therefore easy to reach cable ports in the frame to insert shift or brake sleeves, Di2 cables or even no sleeves at all - there are the appropriate cover plugs for all of this.

4-piston disc brakes

4-piston disc brakes

The demanding riders of high-end MTBs and touring e-bikes - with or without "E" support - are satisfied with nothing less than the most powerful hydraulic disc brakes in terms of braking performance and riding safety. They have 4 pistons per caliper instead of 2, and their larger brake pads can withstand much more heat, making them almost immune to fading (less friction due to heating).

Di2-ready

Electronic shifting is already well established in road bikes as well as in mountain bikes next to classic mechanical systems. Impressively fast and reliable gear changes and minimum maintenance pay their dividends not only at the Tour de France, in cyclocross or on the Cross-Country World Cup circuit. That's why STEVENS road bike and MTB frames are "Di2"-ready, meaning they are prepared for an elegant integration of batteries and electric cables (instead of usual wire cables). Even for the classy Alfine gear hub Shimano offers an electronic version.

Tapered Steerer / Tapered Headtube

Fork shaft (or steerer tube) and head tube are tapered, meaning their diameter increases from top to bottom resulting in a conical shape. The diameter needs to be bigger at the bottom since this is where higher stress is applied - especially when the bike has a higher total weight due to luggage or an e-drive and battery. Also tapered steerers feature a smoother force transfer (like forces caused by hard braking) to the downtube than forks with a continuous 1 1/8" diameter.

QR15 Front Thru-Axle

"15" stands for the diameter in millimeters, "QR" for quick release. Combined they are the most useful method to fix the front wheel to the (suspension) fork. With convincing advantages: high stiffness, precise positioning of the brake disc and super-easy handling. So STEVENS specs almost all its mountain bikes and even high-quality trekking bikes, cross bikes and pedelecs with a thru-axle. Additionally, especially with 29" MTBs axle spacing is increased from 100 to 110 mm which makes the design even stiffer.

E-thru Rear Axle

E-thru Rear Axle at E-Cayolle

This abbreviation stands for Shimano's thru-axle standard for rear stays that integrates a thread into the dropout. As a result, the 12mm thru axle provides outstanding rear triangle stiffness and utmost precision in brake disc alignement to prevent annoying brake rub.

Geometry

schematische Skizze eines Fahrrades mit eingezeichneten Geometrie-Messpunkten

Frame height (") 16 18 20 22 Measuring mode
Wheelsize (") 29 29 29 29  
Seattube length A1 624 629 644 661 nominal
Seattube length A2 396 420 480 520 bottom bracket to top of seattube
Seattube length A3 337 386 423 470 bottom bracket to top of top tube
Top tube length B 552 574 596 619  
Top tube horizontal C 573 598 623 648 center headtube to center seatpost/seattube
Headtube angle (°) D 70 70 70 70  
Seattube angle (°) E 74,5 74,5 74,5 74,5  
Wheelbase F 1075 1100 1127 1152  
Chainstay length G 435 435 435 435  
Headtube length H 95 100 115 125  
Bottom bracket drop I 65 65 65 65 distance of bottom bracket to hub level
Bottom bracket height K 306 306 306 306 distance to ground
Fork rake L 44 44 44 44  
Slope M 259 219 194 167 top tube level distance front to rear
Wheel radius N 371 371 371 371 incl. tires
Standover height O 734 766 795 826 top of top tube to ground*
Fork build height P 490 490 490 490 incl. lower headset cups
Front wheel - bottom bracket Q 648 674 700 725  
Reach R 405 428 449 472 center bottom bracket to center headtube, horizontal
Stack S 601 606 620 629 center bottom bracket to center headtube, vertical
Stack/Reach (1:x)   1,48 1,40 1,38 1,35 ratio stack to reach
Seatpost diameter   30,9 30,9 30,9 30,9  
Stem length   70 80 90 100 center-center
Stem angle (°)   5 5 5 5  
Handlebar diameter   31,8 31,8 31,8 31,8  
Assembled spacers   8.3 + 5 + 5 + 5 + 10  
Handlebar width   700,0 700,0 700,0 700,0  
Cranklength   170 175 175 175  
    16 18 20 22  

* measured 1/3 from seattube and 2/3 from headtube

// NEVER STOP