Sortie Black 29

2012 seems to be the year of the 29er. What started as a revolution has evolved into the norm. The 29er craze has spread east to west, north to south and everywhere in between. Why you might ask? Well, there are some real tangible benefits from the larger diameter wheel:

  • Angle of Attack – Larger wheels decrease your angle of attack by allowing you to roll over obstacles easier and faster. Bigger wheel = smaller obstacle.
  • Momentum – A larger wheel enables one to carry momentum easier though obstacles.
  • Surface Contact – 29”wheels are less prone to sinking in soft material such as sand and mud due to the larger contact patch causing lower ground pressure. The longer contact patch increases cornering and straight line traction
  • Stability – The relative position of the bottom bracket/cranks to the axles in the wheels also means that your relative center of gravity is lower. This results in a feeling of riding “in” the bike rather than on top of it.
  • Tire Clearance – with more tire choices than any platform, the 29”wheel easily accommodates off road as well as commuting tires.
  • Taller Riders – 29" bikes tend to offer taller riders a more “natural” frame geometry.

The Sortie 29er was inspired by our bellowed Sortie 26” platform. Our goal simple: retain ride characteristics of the Sortie trail platform while adding the benefits of a larger diameter wheel. Not a simple task by any means but what we’ve come up with is a bike that’s being hailed as one of the best 29inch bikes on the market. We’ll take that!

Diamondback’s Design Philosophy is a no-nonsense approach to building quality bicycles. We want our bike designs to be straightforward: their hardware accessible and their suspension simple.

Diamondback’s Sortie29 Black is our crème de la crème top shelf offering as far as 29er’s go – heck, almost as far a bikes go… period. This 6061-T6 Weapons Grade Aluminum frame features a hydroformed top tube, a butted and formed downtube, a seatstay bridge, tapered headtube, a 142×12mm E-Thru Axle drop out and Diamondback’s legendary Knuckle Box Suspension technology.

The Knuckle Box, or bell crank, is the core of our single-pivot four-bar suspension platform. Optimally placed pivots equate to a low leverage ratio, and ultimately to superior pedaling efficiency and small-bump compliance. This also allows the shock to work more efficiently and reduces pedal induced motion. It also reduces overall load on the system which will lead to improved shock and bearing life.

Placing the Knuckle Box low within the frame, situates the greatest weight of the bike closer to the bottom bracket, which lowers the bike’s center of gravity and allows it to better track and corner.

Wheel-rate is also one of the most significant aspects of a suspension system. Wheel-rate is the effective spring-rate when measured at the wheel. A benefit of our four-bar linkage is increased control over the wheel-rate. Obtaining the spring-rate curves in shocks from Fox is necessary to allowing us to determine the wheel-rate. Working closely with Fox, we’re able to optimize the wheel-rate to be linear-to-slightly progressive. This results in superb small-bump compliance, more perceived travel and excellent bottom-out protection. For our Sortie29 series, we’ve chosen to run a 115mm travel Fox Float RP23 Air Shock with Kashema Coat, Adaptive Logic and Boost Valve Technologies. The extra volume “XV” 190×51mm air shock with rebound adjust and all new 3 position “adaptive logic” Propedal Platform keeps the rear riding plush without too much sacrifice on the pedal uphill. The RP23’s patented Boost Valve technology provides a feeling of endless travel and plushness like that of a downhill rig, but with XC pedaling efficiency.

The Sortie29 Black has essentially taken the “everyman’s” best componentry and created an affordable pro caliber build… starting with the Fox 32 Float 29 FIT RLC 120mm travel air fork. This top end fork comes with low speed compression, rebound, lever actuated lockout, alloy tapered 1.5 steerer, 32mm Easton aluminum stanchions, magnesium lowers, and a beefy 15mm thru axle. Fox’s isolation technology (FIT) employs a bladder system that simply keeps the oil and air from mixing to provide optimal performance in all riding extremes. The lockout function comes in handy for long sustained climbing. And at a hair under 4lbs, this little beast helps to keep weight down.

Complementing Fox’s stellar suspension package on the Sortie29 Black, is the ultimate in mountain bike componentry… a full Shimano XTR package. Bam! A top of the line frame deserves to wear top of the line parts. Included in this are a set of XTR 10spd Rapidfire shifters, an XTR rear derailleur, HG980 XTR 10spd Cassette (11-36t), a XTR Hollotech Dyna-Sys 10spd Crankset w/ XTR BB (24/32/42t) and an HG94 10spd chain. We spare none by adding Shimano XTR Hydraulic Disc Brakes with ICE technology. These brakes have incredible modulation for the ultimate control over your breaking power. ICE technology helps keep the 180mm front / 160mm rear rotors cool. This leaves nothing to desire and offers pro competition level quality in the lightest weight package available on the market today.

We did decide to go with a Sram high direct mount front derailleur for our entire Sortie29 series. In particular, a Sram X0 High Direct Mount 3×10 for this bike. The reason for this was clearance. One of the great challenges in creating a frame that rides well and also accommodates a 700c wheel is many of the clearance issues that arise… from tire size within the stays, to derailleur options, etc. In order to accommodate and keep our chainstays short, enhancing the ride qualities of the bike, we went with a less intrusive front derailleur option that provides more clearance. Please note that if you choose to run certain derailleurs other than this, you may find that it conflicts with certain tire sizes.

Last but not least we’ve finished off the Sortie29 Black with a set of Easton 24h EA90 XC, 29" Clincher/UST compatible wheels, an EA90 Stem and an EC70 Carbon post and XC CNT LoRise Carbon 31.8mm wide handlebars.

I told you it was good!

Knuckle Box Frame Features:

Tapered Head tube – Today’s longer travel forks generate more stress on the head tube. Add in today’s more aggressive rider and the need for additional strength in that region becomes imperative. Thus the 2012 Mission Pro frame is equipped with a tapered head tube for enhanced steering and extra strength.

142×12 mm Thru Axle – Employing Shimano’s new 142×12 mm E-Thru design makes for a stiffer and stronger rear-end on the bike.

Single-Sided Hardware – Single-sided oversized heat treated hardware is used for the three main pivot points allows for easy access to your 14 high-quality Enduro Max bearings simply with standard tools. No more removing the crankset to tighten or service your pivots.

Partnership w/ Fox – By providing suspension kinematics early in our design process, Fox is able to custom tune their shock to work precisely with our frames, improving performance.

Knuckle Box Technology
LOW AND TIGHT – The Knuckle Box platform was designed specifically to be low and tight:

  • Low center of gravity: All suspension parts are positioned farther down on the frame for a stable and balanced ride.
  • Low leverage suspension design: Lower air pressure results in longer shock life, less frame loading and better pedaling.
  • Tight, compact linkage system of the Knuckle Box bell crank isolates and cradles the rear shock.
  • Tight and large anodized aluminum hardware, matched with Force-Rated Enduro Max Bearings: Withstands higher loads and better handles oscillating motion.

The Sortie29 Black comes in 4 sizes: SM (15.5"), MD (17"), LG (19"), XL (21") and is stealth black with gray accents.

If you are searching for the ideal full suspension 29er capable of sustained trail climbs or descents, super D’s, Enduro’s or all day in the saddle XC rides… you just found your bike my friend.


  • Weapons Grade Aluminum Sortie 29 4.5” Trail Frame w/ Knuckle Box Suspension Platform, Taper Head Tube, and 142x12mm Thru Axle Drop Outs
  • Fox 32 Float29 RLC FIT 120mm Fork, Taper,15QR / Fox Float RP23 XV Rear Shock w/KASHIMA COAT
  • Easton EA90 29 Wheelset 15QR / 142x12 E-Thru rear axle
  • Shimano XTR DYNA-SYS Trail Triple Crank, XTR Shadow Plus rear Derailleur
  • Shimano XTR Hydraulic Disc Brakes

Bike Specs

Sizes 15.5" Small  17" Medium  19" Large   21" XLarge  
Frame Sortie 29r Trail 4.5" 6061-T6 Weapons Grade Aluminum w/ Taper Head Tube / Hydroformed Top Tube, Butted / Formed Down Tube / Seatstays, Under Arch Seatstay bridge, Knuckle Box Technology, 142x12mm E-Thru Axle Drop out
Fork Fox 32 Float RLC F.I.T. 29 Air, 120mm travel, "FIT" cartridge, with ext. compression / rebound / lock out, butted Alloy Tapered 1.5 steerer, 32mm Easton aluminum stanchions, w/KASHIMA COAT, magnesium lowers, 15mm thru axle
Rear Shock Fox Float Adaptive Logic, RP23 "XV" extra volume 190x51mm Air w/rebound adj, w/NEW 3 position "adaptive logic" Propedal Platform, with On/Off lever, w/KASHIMA COAT
Cranks Shimano XTR Hollotech Dyna-Sys 10spd Crankset w/ XTR BB, 24/32/42t
Bottom Bracket XTR
F. Derailleur Sram X-0 High Direct Mount 3x10
R. Derailleur Shimano XTR SGS 10spd
Shifter Shimano XTR 10spd Rapidfire
Brake Levers Shimano XTR, w/tool-free reach adj. free stroke adj.
Brakes Shimano XTR Hydraulic Disc w/cooling fins, w/ 180mm frt / 160mm rear Rotors
Cassette Shimano HG980 XTR 10spd Cassette (11-36t)
Rims Easton 24h EA90 XC, 29" Clincher - UST
Tires WTB Wolverine 2.2 Team XC, Dual DNA compound, Aramid bead, Folding
Pedals Shimano XTR clipless
Handlebar Easton EC-70 XC CNT LoRise Carbon 31.8mm
Stem Easton EA90 31.8mm
Seatpost Easton EC90 CARBON Double bolt clamp 31.6mm
Seat WTB VIGO comp
Headset FSA No55 Taper 1.5 / 1 1/8" Alloy cups, Sealed Cartridge
Colors Black/Grey
Chain Shimano HG94 10spd
Hubset (F) Easton 24h EA90 XC, 15QR Alloy Sealed Cartridge Bearing Disc (R) Easton 24h EA90XC, 142x12 thru axle, Alloy Sealed Cartridge Bearing Disc, w/ Shimano E-thru QR Axle
Spokes Easton SAPIM butted Spokes
Grips DB4L "Lock on" 135mm Kraton
Extras Knuckle Box Shock Pump, Sag Gauge, DB Key Chain, Owner’s manual / Sortie owner's manual cover, Chainstay Protector, Clear Coat, H20 bottle mounts
Note Specifications Subject to Change


Size 15.5" Small 17" Medium 19" Large 21" XLarge
Seat Tube Length ** 15.5" 17.0" 19.0" 21.0"
Standover Height 29.0" 30.0" 31.0" 32.5"
Top Tube Length * 22.5" 23.5" 24.0" 25.0"
Head Tube Length 100.0mm 110.0mm 130.0mm 140.0mm
Head Angle 69.5° 69.5° 69.5° 69.5°
Seat Angle 73.0° 73.0° 73.0° 73.0°
Wheel Base 1107.0mm 1133.0mm 1149.0mm 1163.0mm
Chain Stay Length 455.0mm 455.0mm 455.0mm 455.0mm
Fork Offset 44.0mm 44.0mm 44.0mm 44.0mm
BB Height 330.0mm 330.0mm 330.0mm 330.0mm
Stem Length 70.0mm 80.0mm 90.0mm 100.0mm
Handlebar Width 685.0mm 685.0mm 685.0mm 685.0mm
Crank Length 170.0mm 175.0mm 175.0mm 175.0mm
Seat Post Length 300.0mm 300.0mm 300.0mm 300.0mm
* Measured Horizontally ** Measured from Center

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