The Diamondback Sortie series is the quintessential trail bike. Responsive enough for challenging epic trail rides or those all day XC grinders, the Sortie craves and owns the singletrack domain. The Sortie Two is designed to strike a balance of agility and stability. It rides well at all speeds 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 2012 we’ve revamped the rear triangle effectively making it stronger and stiffer without any weight gain. Put simply, the Sortie Two 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.
2012 Sortie Two frames are created from 6061-T6 Weapons Grade Aluminum and features 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 Diamondbacks 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 this application we’ve chosen to run a 130mm Fox
Float RP23 Air Shock with 3 position Adaptive Logic Pro Pedal and Boost Valve Technologies. The extra volume “XV” 200×57mm 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.
Component wise, the Sortie Two continues to be a high performance machine, weaving in a more cost effective component package. Starting with the Fox 32 Float RL 140mm travel air fork, this fork comes with an open bath system with external rebound, 32mm Easton aluminum stanchions, magnesium lowers, and a standard 9mm quick release axle.
Complementing the Fox suspension package on the Sortie Two, is practical and cost-effective component package starting with a Shimano drivetrain. This SLX/Deore mix includes an FCM552 Dyna-Sys 10spd Crankset with external BB (24/32/42t), Deore Deore M505 hydraulic disc brakes, Deore shifters, Deore front and SLX rear derailleurs, an HG62 Deore 10spd cassette, and HG54 chain. EA30 post and stem come courtesy of Easton while the bars, a set of DB Lazer Series 31.8mm low rise, come courtesy of Diamondback. A WTB Vigo seat provides a style and comfort for those all day spins.
Last but not least we’ve finished off the Sortie Two 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.
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 2012 Sortie series comes in SM (15.5"), MD (17"), LG (19"), XL (21") sizes and the Two is blue with white accents 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 Two is the perfect full suspension trail machine for the rider serious about the ride and the value.