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  • Cortex SLX in Mint
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
    • Cortex SLX in Mint
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    Sonder Bikes Ready to Ride Deals

    Cortex / Medium Short-travel 29er

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        Outdoor Brand of The Year

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        Lifetime Guarantee

      This is an Ex Demo/Display bike based at our store in Hathersage. For more info please call our Metrocentre Sonder bike expert on Tel: 0191 603 0939.
      Details

      Fast and agile, Cortex is a mid-travel full suspension trail bike for big mountain epics on all terrain and flying round your local trail centre. It comes alive on long technical descents with 140mm travel up front and 135mm at the rear, big wheels and a stiff, responsive frame.



      With bang up to date geometry, Cortex inspires confidence 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 your grin.

      The tried and tested Horst link design keeps the suspension active when braking. We've fine tuned the leverage curve and worked with SRAM RockShox to produce a rear shock that's custom-tuned for the Cortex - maximum downhill performance while maintaining the all-day pedalling efficiency from its predecessor. Cortex is your do-it-all bike of choice for lakeland 30-milers and flat-out trail centre laps alike; with enough travel to carry speed over longer sections of rough ground and a lively, playful feel through the twisty bits.

      Cortex' frameset is hand-welded from 6061 double-butted aluminium for the perfect mix of weight, rigidity and durability; with a slim hydroformed top-tube and down-tube designed to improve stiffness with just enough compliance to get you out of trouble. Internal cable and stealth dropper routing means clean lines, dampened with foam liners for a quiet ride. Dialed-in geometry and 2.4” tyre clearance gives heaps of grip; a comfortable and efficient climbing position for big days in the saddle; and a stable, spirited platform for smashing down descents.

      Why Shimano SLX?

      Shimano drivetrains are designed, engineered and manufactured to work as complete drivetrain systems. Shimano's new microspline hub means that you can run a 10 tooth cassette for a huge gear range. The new EV shifters and brakes provide loads of adjustment to get the perfect position as well as a rock-solid feel on the bars. And the 4-pot brakes provide consistent and reliable stopping power.

      **Lead image represents the bike for sale, please see store pics for the actual bike.

      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-T6 Aluminium, Heat-Treated
      Fork:RockShox Psylo Silver R | 140mm (travel)
      Shock:RockShox Deluxe Select+ | 210 x 50
      Headset:FSA Orbit C-40-ACB
      Groupset
      Shifters:Shimano SLX M7100 | 1x | 12-speed
      Brakes:Shimano SLX M7120 | Hydraulic | Post mount
      Rotors:Shimano RT66 | 203mm (front), 180mm (rear) | 6-bolt
      Rear derailleur:Shimano SLX M7100 | Long cage | 12-speed
      Chainset:Shimano SLX M7100 | 170mm | 32t
      Cassette:Shimano CS-M7100 | 10-51t | 12-speed
      Chain:Shimano CN-M7100 | 12-speed
      Bottom bracket:Shimano MT801 | BSA
      Wheelset
      Wheels:Sonder Nova 29" UK Made
      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 2.4-2.8"
      Finishing kit
      Handlebars:Sonder Aspect Riser | 780mm
      Stem:Sonder Piskie
      Seatpost:X-Fusion Manic | 31.6mm
      Saddle:Sonder Abode
      Grips:Sonder Clutch | Black
      Weight
      Frame:S: TBC M: TBC L: TBC XL: TBC
      Build:S: TBC M: TBC L: TBC XL: TBC
      Pedals not included with full builds
      Specifications are subject to change without notice
      Geometry and Sizing

      Sizing

      SizeSmallMediumLargeX-Large
      Rider Height

      5ft 2in - 5ft 7in 

      (158-173cm)

      5ft 6in - 5ft 10in

      (170-177cm)

      5ft 9in - 6ft 2in

      (175-187cm)

      6ft 2in + 

      (187cm +)

      ST - Seat tube400410440460
      ETT - Estimated top tube576597625647
      HT - Head tube100105115125
      HA - Head angle65656565
      AC - Axle to crown550550550550
      SA - Seat angle75.675.675.675.6
      CS - Chainstay440440445445
      BB - BB drop40404040
      FO - Fork offset44444444
      WB - Wheelbase1173119512291253
      RE - Reach420440465485
      SK - Stack608614624633
      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
      ZS44/28.6| ZS56/40 headset (frame and rear shock does not come with headset)