Cortex NX Eagle [Special Build]

Short travel 29er

$0.00

Cortex

Fast and agile, Cortex is a trail riding, down-country, all terrain mountain bike for seriously ep...

Cortex NX Eagle [Special Build]

Photos for illustration purposes. Please check the bike spec for detailed component listings.

Cortex NX Eagle [Special Build]

Short travel 29er

$0

Our Sonder Product Manager, Neil, has put together this special build. It's the spec he'd choose to ride. A fast and agile short travel full suspension 29er mountain bike with SRAM NX Eagle 1x12 groupset, Rockshox Pike Ultimate fork and Deluxe Select+ rear shock.

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Cortex NX Eagle [Special Build]

Short travel 29er

$0

Our Sonder Product Manager, Neil, has put together this special build. It's the spec he'd choose to ride. A fast and agile short travel full suspension 29er mountain bike with SRAM NX Eagle 1x12 groupset, Rockshox Pike Ultimate fork and Deluxe Select+ rear shock.

Buy Now. Get yours in 5 days.

  • Please select

  • Handlebar

    • Sonder Aspect Riser 780mm

    • Sonder Aspect Riser [OEM]

      In general riser bars tend to be wider than flat bars and may have slightly more flex to give a more forgiving ride. As you go into descents and your arms drop below your knees the additional height gained on your front end will help you take control of the steep descents.

      That said you can get all bar types in a range of widths and stiffnesses and front end height can be adjusted with spacers like our Sonder Rings, so sometimes you just have to ignore the mumbojumbo and make your call on style and personal preference and there is nothing wrong with that.

    Saddle

    • Sonder Abode Black / 138

    • Sonder Abode [OEM]

      High density foam padding over a plastic base provides comfort and longevity. A v-shaped split at the rear of the saddle allows flex as you are riding, increasing shock absorbancy and reducing pressure on the spot between your sit bones.

      Scooped up at the back with a slight rise towards the nose the longitudinal profile provides a cupped, craddled seating position, a timeless, proven design for distance on and off the road or climbing in the mountains.

      Stainless steel rails give 50 mm of forward and back adjustment to help you find your sweet spot.

      All our Sonder bikes come with Abode fitted as standard.

    • Sonder Abode Black / 158

    • Sonder Abode [OEM]

      High density foam padding over a plastic base provides comfort and longevity. A v-shaped split at the rear of the saddle allows flex as you are riding, increasing shock absorbancy and reducing pressure on the spot between your sit bones.

      Scooped up at the back with a slight rise towards the nose the longitudinal profile provides a cupped, craddled seating position, a timeless, proven design for distance on and off the road or climbing in the mountains.

      Stainless steel rails give 50 mm of forward and back adjustment to help you find your sweet spot.

      All our Sonder bikes come with Abode fitted as standard.

    Seatpost

    • X-Fusion Manic Drop Seatpost and Lever 31.6mm / 125mm

    • X-Fusion Manic Drop Seatpost and Lever

      The X-Fusion Manic Dropper has been designed to work well across cross-country, trail, all mountain and enduro riding.

      It works on a simple design. Inside you’ll find a closed cartridge that is both sealed and designed to be easily removable from the rest of the post. Simple construction aside, the action of this post feels super-smooth and silky.

    • X-Fusion Manic Drop Seatpost and Lever 31.6mm / 150mm

    • X-Fusion Manic Drop Seatpost and Lever

      The X-Fusion Manic Dropper has been designed to work well across cross-country, trail, all mountain and enduro riding.

      It works on a simple design. Inside you’ll find a closed cartridge that is both sealed and designed to be easily removable from the rest of the post. Simple construction aside, the action of this post feels super-smooth and silky.

  • Forks

    • RockShox Pike Ultimate RCT3 29er / 130mm

    • RockShox Pike Ultimate RCT3
    • RockShox Pike Ultimate RCT3 27.5 / 150mm

    • RockShox Pike Ultimate RCT3
    • RockShox Pike Ultimate RCT3 29er / 130mm [OEM]

    • RockShox Pike Ultimate RCT3
    • RockShox Pike Ultimate RCT3 27.5 / 150mm [OEM]

    • RockShox Pike Ultimate RCT3

    Shock

    • Rockshox Deluxe Select+ / 190x45

    • Rockshox Deluxe Select+ / 190x45
  • Tubes

    • WTB Inner Tube 29 / 1.9-2.3

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

    • WTB Inner Tube 27.5 / 1.9-2.3

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

    • WTB Inner Tube 27.5 / 2.5

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

    • WTB Inner Tube 700 / 28-38

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

    • WTB Inner Tube 27.5 / 2.8-3.0

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

    • WTB Inner Tube 700 / 38-45

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

  • Pedals

    • No Pedals (none)

    • No Pedals
  • Bottle cages

    • No Bottle Cages (none)

    • No Bottle Cages

    Mudguards

    • No Mudguards (none)

    • No Mudguards
Total Price
$0
Description

Cortex

Fast and agile, Cortex is a trail riding, down-country, all terrain mountain bike for seriously epic days out. It comes alive on long technical descents with 120 mm rear travel, big wheels and a stiff responsive frame.

With bang up to date geometry, Cortex is confidence inspiring with a playful character. Stand up and mash on the pedals out of turns, manual sections of trail and pop off tree stumps, rocks and roots. Smash out short and loose technical climbs, flat out descents and tight techy singletrack sections. The harder you push the bigger you grin.

..Read more

Neil's take

I find NX Eagle to be the sweet spot between performance and price. You're getting a lot of the benefits of GX Eagle mixed with some of the value of SX. It's a real Goldilocks groupset.

Then, chuck in the excellent Pike forks, which give you great control over the rough stuff, and our lightweight, performance Alpha 29" wheels, that spin up quick and roll smoothly, and you've got a build that'll ride beautifully.

At a glance

  • SRAM NX Eagle 12-speed groupset
  • Rockshox Pike Ultimate fork
  • Rockshox Deluxe Select+ shock
  • Sonder Alpha 29" wheelset

Cortex frameset is hand-welded from 6061 double butted aluminium with a tapered ovalised top-tube and large section down-tube for a stiff chassis with just enough compliance to get you out of trouble. 66 head angle, 74.5 seat tube angle, 40 mm bottom bracket drop and a 465 mm reach (size large). Cortex’s dialed in geometry and 2.6" tyre clearance offers a comfortable and efficient climbing position for big miles and a stable, spirited platform for smashing up descents.

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Features

Up to Date Trail Bike Geometry

Trail bike Agility with Enduro bike stability, the Cortex has a confidence inspiring, stable and forgiving ride.

Metric Shock Standard

Designed around metric shock sizing standard, with lengthened shocks and shorter strokes that increase bushing overlap for more smooth, supple, sensitive and reactive suspension action.​

Horst link suspension design

The tried and tested Horst link suspension design allows the suspension to stay active when braking.​

Tyre Clearance

​Clearance for up to 29 x 2.6in tyres.

Internal Cable Routing

​Internal routing in the front triangle for clean lines.

Build Spec
Frameset
Frame:Cortex Frame | 6061 aluminium
Fork:RockShox Pike Ultimate | 130mm (travel)
Headset:FSA Orbit C-40-ACB
Groupset
Shifters:SRAM NX Eagle Trigger | 1x | 12-speed
Brakes:SRAM Guide T | Hydraulic | Direct mount
Rotors:Avid Centreline | 180mm (front), 160mm (rear) | 6-bolt
Rear derailleur:SRAM NX Eagle | Long cage | 12-speed
Chainset:SRAM NX Eagle DUB | 170mm | 32t
Cassette:SRAM PG1230 | 11-50t | 12-speed
Chain:SRAM NX Eagle | 12-speed
Bottom bracket:SRAM DUB | BSA | 73mm
Wheelset
Wheels:Sonder Alpha 29"
Front tyre:Goodyear Newton MTF Trail Tubeless | 29 x 2.5" | Black
Rear tyre:Goodyear Newton MTR Trail Tubeless | 29 x 2.4" | Black
Tubes:WTB | 29 x 2.2-2.4"
Finishing kit
Handlebars:Sonder Aspect Riser | 78cm
Stem:Sonder Piskie | 35mm
Seatpost:X-Fusion Manic | 31.6mm | 150mm (drop)
Saddle:Sonder Abode | 158mm | Black
Grips:Sonder Clutch | Black
Weight
Frame:S: 1.97kg; M: 2.0kg; L: 2.1kg; XL: 2.14kg
Build:S: 12.4kg; M: 12.65kg; L: 13.8kg; XL: 13.9kg
Pedals not included with full builds
Geometry and Sizing

Sizing

It is important to get the right size bike, if the bike fits it will be faster, more comfortable, and easier to handle. You can also take into consideration the standover height to ensure you pick a bike that will be a good fit. If you measure your inside leg and ensure there is a minimum of an inch from the toptube to your crotch this will give you enough seatpost adjustment to find your optimum saddle height.

Generally we recommend:
Small: Riders between 5ft 2in and 5ft 7in
Medium: Riders between 5ft 6in and 5ft 10in
Large: Riders between 5ft 9in and 6ft 2in
X-Large: Riders of 6ft 2in +

Cortex

Size Small Medium Large X-Large
ST - Seat tube 400 425 465 485
TT - Top tube 587 608 636 658
HT - Head tube 100 105 115 125
HA - Head angle 66 66 66 66
SA - Seat angle 74.5 74.5 74.5 74.5
CS - Chainstay 442 445 447 450
BB - BB drop 40 40 40 40
FO - Fork offset 51 51 51 51
WB - Wheelbase 1169 1191 1220 1244
SO - Stand over TBC TBC TBC TBC
RE - Reach 420 440 465 485
SK - Stack 602 606 615 625
Tyre Diameter 755 755 755 755
Fork Axle to Crown 540 540 540 540
Frame Spec

Alloy 29er short travel full suspension trail bike 

Weight: S: 2.73kg; M: 2.91kg; L: 3.05kg; XL: 3.11kg
Hydroformed and custom butted alloy frame tubing
Internal cable routing
Rear Shock: Rockshox Deluxe Select+ 190 x 45mm
Horst link suspension layout
120mm rear travel; 130mm fork travel
Clearance for up to 29 x 2.6" wide tyres
73mm BSA threaded bracket shell
148 x 12mm rear thru-axle
31.6mm seat tube, 34.9mm clamp
Headset: IS42/28.6 | IS52/40
Reviews