The Diamondback Sortie series is the quintessential trail bike. Responsive enough for challenging epic trail rides or those all day XC grinders, the Sortie dominates the singletrack. The Sortie is designed to strike a balance of agility and stability. It rides well at all speeds and is as nimble climbing up the mountain as it is stable descending.

Years of product testing and refinement have gone into the Sortie’s platform. For 2013 we’ve continued to tinker with the rear triangle, making it stronger and stiffer than ever before. Put simply, the Sortie is a bike that’ll make you feel like you are cheating.

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.

2013 Sortie frames are created from 6061-T6 Weapons Grade Aluminum and feature a hydroformed top tube, a butted and formed downtube and seatstays, an under arch seatstay bridge, a tapered headtube, a standard 9×135mm vertical 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, the effective spring-rate when measured at the wheel, is one of the most significant aspects of a suspension system. A benefit of our four-bar linkage is increased control over the wheel-rate. Obtaining the spring-rate curves in a shock allows us to determine the wheel-rate. We’re then 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 this application we’ve chosen to run a Rock Shox Monarch R 200×57mm Air Shock with external rebound adjust – keeping things simple and effective.

Component wise, the Sortie continues to be a high performance machine, weaving in a more cost effective component package. Starting with a Rock Shox XC 32 120mm travel coil sprung fork , with turnkey lockout, external rebound damping, preload adjust and a standard 9mm quick release axle.

Shimano adds value and performance with an Alivio/SLX drivetrain. Alivio 9spd Hollowtech crank set shifters and front derailleur combine with a SLX SGS Shadow type rear derailleur, a KMC Z99 chain to transfer power to the ground. Shimano brings the stopping power with a set of M395 hydraulic disc brakes.

A DB AL6061 aluminum and DB Lazer Series 31.8mm low rise bar comprise the cockpit while a WTB Vigo seat provides a style and comfort atop a Diamondback Lazer Series Micro Adjust 31.6mm post for those all day spins.

Last but not least we’ve finished off the Sortie with a set of 32h SL-6 Doublewall Disc rims laced to alloy disc hubs and mounted with Kenda Slant 6 tires.

Knuckle Box Frame Characteristics:
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.

Knucklebox 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 2013 Sortie comes in SM (15.5"), MD (17"), LG (19"), XL (21") sizes and is in color. If you are on the hunt for the most nimble and aggressive Trail/XC bike on the market… look no further. The Sortie is the perfect full suspension trail machine for the rider serious about ride and value.


  • Weapons Grade Aluminum Sortie 5” Trail Frame w/ Knuckle Box Suspension Platform
  • Rock Shox XC32 120mm Fork w/TurnKey Lockout / Rock Shox Monarch R Rear Shock
  • Shimano Alivio 9spd Crankset, Alivio frt and SLX rear Derailleur’s
  • SL-6 Double Wall Disc Rims
  • Shimano M395 Hydraulic Disc Brakes

Bike Specs

Sizes 15.5" Small  17" Medium  19" Large  21" XLarge 
Frame Sortie Trail 5" 6061-T6 Weapons Grade Aluminum w/ Hydroformed Top Tube, Butted / Formed Down Tube / Seatstays, Under Arch Seatstay bridge, Knuckle Box Technology, 9mmx135mm Verticle Drop out
Fork Rock Shox XC 32 120mm travel coil spring, w/Turn key Lockout external rebound damping, Preload adj.
Rear Shock Rock Shox Monarch R 200x57mm Air w/external rebound adj
Cranks Shimano Alivio 9spd Hollowtech, Octalink w/ replaceable rings, 22/32/44t
Bottom Bracket Shimano BB-ES25 w/Octalink spindle
F. Derailleur Shimano Alivio dual pull, top swing, 34.9
R. Derailleur Shimano SLX SGS 9spd Shadow type
Shifter Shimano Alivio 9spd Rapidfire
Brake Levers Shimano M395 hydraulic brake levers w/reach adj.
Brakes Shimano M395 Hydraulic Disc w/ 6-bolt, 180mm frt / 160mm rear Rotors
Cassette Shimano HG30 9spd Cassette (11-34t)
Rims 32h SL-6 Doublewall Disc
Tires KENDA Slant 6 26x2.1
Pedals DB Toe Clip Compatible alloy
Handlebar DB Lazer Series 31.8mm low rise
Stem DB AL6061 Ahead 7° 31.8mm
Seatpost Diamondback Lazer Series Micro Adjust 31.6mm
Seat WTB VIGO comp
Headset Zerostack, shallow steel cups, Loose ball bearing 1 1/8"
Colors Black
Chain KMC-Z99
Hubset (F) 32h SL-6 Alloy w/ CNC Disc Mount (R) 32h SL-6 Alloy Cassette w/ CNC Disc mount
Spokes Black 14g Stainless Steel
Grips DB4L 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 ** 15.5mm 17.0mm 19.0mm 21.0mm
Standover Height 28.0mm 28.5mm 28.5mm 29.5mm
Top Tube Length * 22.5mm 23.5mm 24.0mm 25.0mm
Head Tube Length 120.0mm 130.0mm 130.0mm 140.0mm
Head Angle 70.0° 70.0° 70.0° 70.0°
Seat Angle 73.0° 73.0° 73.0° 73.0°
Wheel Base 1076.0mm 1106.0mm 1115.0mm 1134.0mm
Chain Stay Length 435.0mm 435.0mm 435.0mm 435.0mm
Fork Offset 35.0mm 35.0mm 35.0mm 35.0mm
BB Height 336.0mm 336.0mm 336.0mm 336.0mm
Stem Length 90.0mm 90.0mm 105.0mm 105.0mm
Handlebar Width 670.0mm 670.0mm 670.0mm 670.0mm
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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