Mar 29 2021

New Define AL 170



We are proud to introduce the new Define AL 170, a long-travel, mixed-wheel-size sled for all-round shredding in any terrain – pedal to the mountain, tear it all up, cruise home smiling.
The AL 170 joins the Define range as its biggest-hitting bike, with relaxed geometry, 170mm rear and 180mm front suspension travel, 29in front and 27.5in rear wheels, and a send-proof aluminum frame.

We selfishly made the Define 170 for the riding we most enjoy. It is perfect for big jumps and severe terrain, and it is happy on the uphills, too. It is the most aggressive bike in the Define range, but one that is still fun to ride everywhere. Enduro, freeride, bike park ripper, call it what you like – at NS, a company of riders, we have fallen in love with this beast.

With the Define AL 170, nowhere is off-limits 
Designed to address the needs of riders who want more confidence from their ride than a standard Enduro bike can deliver but still want to be able to pedal the damn thing! The Define 170 will feel at home on the biggest lines in the bike park and still remain playful thanks to the smaller, lighter rear wheel and shorter chain stays.

At the same time, the 180mm front and 170mm rear suspension travel will gobble up anything you throw at it and keep your wheels on the ground when you want them to be there.
The hydroformed frame is derived from the original Define Carbon, proven in aluminum with the Define AL 130, 150, and 160 bikes, and reimagined in this latest addition to the range.



A 64º head angle and 76º effective seat tube angle ensure the Define AL 170 pedals up the mountain (or at least to the chairlift, come on now) with ease while providing big-bike confidence when you are flying back down the hill. Its 490mm reach, 846mm front-center, and 1,284mm wheelbase (size large), combined with its 438mm chainstay length and 44mm fork offset, carefully balance comfort, fun, maneuverability, and stability.
Look closely and you’ll notice the finer details of the bike. Integrated cable routing hides cables in a recess down the length of the downtube, making for easy installation and access while preserving the bike’s good looks and keeping the cables protected. Replaceable chainstay and downtube-protection reduce noise and deflect the hits. 
As with all Define bikes, the AL 170 can be fine-tuned for your riding. A shock hardware flip-chip changes the bottom bracket height by +/- 5mm, the head tube angle by +/- 5º, and the reach by +/- 4mm.


I’ve been testing & riding the Define 170 for a while now and I really have fallen in love with it. Riding it through the fast & rough is so confidence inspiring - it feels extremely stable, planted and well balanced. I find myself being able to change direction really quickly and it puts a huge smile on my face whiles doing so. I feel like if I were only allowed one bike, it would be this one, it just does it all unbelievably well. It’s the ultimate machine.
      Joe Breeden, NS Bikes UR Team



When you are hammering downhill and hitting monster jumps, dependable suspension performance is vital. The Define AL 170 takes the suspension layout used across the range and tweaks it for those who go bigger, faster, and further. At its core, the steadfast Horst Link design has your back. Pedaling efficiency is guaranteed thanks to its considerable anti-squat; this drops off in a linear fashion as you move deeper into the travel, ensuring even the roughest terrain is smoothed out to perfection.



The bike’s progressive leverage curve provides ample mid-stroke support; it becomes slightly regressive for bottom-out control at the end of the stroke.
Consistent anti-rise throughout the travel means the suspension remains active and the geometry balanced while braking.



Define AL 170 1
Frame: AL6061-T6/AL6066-T6
Sizes: Small, Medium, Large
Fork: Fox 38 Performance, 180mm travel
Shock: Fox X2 Performance
Crankset: Truvativ Descendant DUB 6K 170mm 34t
Derailleur: SRAM GX Eagle
Brakes: SRAM Guide RE, 200mm discs
Dropper post: X-Fusion Manic
Tires: Maxxis High Roller II 29x2.5” WT TR EXO
Maxxis High Roller II 27.5x2.4” TR DH

Define AL 170 2
Frame: AL6061-T6/AL6066-T6
Sizes: Small, Medium, Large
Fork: RockShox Zeb, 180mm travel
Shock: X-Fusion Vector R
Crankset: Shimano Deore FCMT5101 170mm 34t
Derailleur: Shimano Deore
Brakes: Shimano MT420, 200mm discs
Dropper post: X-Fusion Manic
Tires: Schwalbe Big Betty BikePark 29x2.4"
          Schwalbe Big Betty BikePark 27.5x2.4"



The popular Define AL 160 is updated and now features 27.5in wheels back and front and coil rear suspension. Featuring 160mm front and rear suspension travel, an alloy frame with revised geometry for improved pedaling and descending, and new Shimano drivetrain, the Define AL 160 is a bombproof big-mountain fun bike you can ride anywhere.



Define AL 160
Frame: AL6061-T6/AL6066-T6
Sizes: Small, Medium, Large
Fork: RockShox 35 Gold RL, 160mm travel,
Shock: X-Fusion H3C
Crankset: Shimano Deore FCMT5101 170mm 34t
Derailleur: Shimano Deore
Brakes: Shimano MT410, 200/180mm discs
Dropper post: X-Fusion Manic
Tires: Schwalbe Big Betty BikePark 27.5x2.4"


All new Defines are available now! Look for your nearest dealer HERE