• Cortex GX Transmission in Storm Blue
  • Cortex GX Eagle Transmission
  • Cortex SLX in Mint
    • Sale

    Cortex GX Eagle Transmission

    $3,749 $4,849

    1

    Select Options

    2

    Customize

    3

    Select Accessories

    Reset

    Built to Order. Be Riding Next Week

    1

    Select Options

    Edit

    • Size
      Please select an available Size
    • Colour
      • Cortex Frame [V2]
      • Cortex Frame [V2]
      Please select an available Colour
    • Size:

    • Colour:

    2

    Customize

    Edit

    Every Sonder bike is built to order so tell us exactly how you want it. Make any changes you want from the standard build and when you're done, just hit “Add to Bag” at the bottom of the page.

    Handlebar

    Sonder Aspect Riser [OEM]
    Sonder Aspect Riser Default Title

    +$0.00

    Sonder Aspect Riser [OEM]
    Sonder Aspect Riser Default Title

    +$0.00

    sonder scope handlebars
    Sonder Scope Handlebar Default Title

    +$64.99 +$34.99

    Saddle

    Sonder Abode [OEM]
    Sonder Abode Black / 138

    +$0.00

    Sonder Abode [OEM]
    Sonder Abode Black / 158

    +$0.00

    Sonder Kura [OEM]
    Sonder Kura Black

    +$47.99

    Sonder Zone [OEM]
    Sonder Zone 133 / Black

    +$49.99 +$47.49

    Sonder Zone [OEM]
    Sonder Zone 152 / Black

    +$49.99 +$47.49

    Brooks B17 Saddle [OEM]
    Brooks B17 Saddle Black

    +$189.99 +$169.99

    Stem

    Sonder Piskie [OEM]
    Sonder Piskie 31.8mm / 35mm

    +$0.00

    Sonder Piskie [OEM]
    Sonder Piskie 31.8mm / 45mm

    +$0.00

    Sonder Piskie [OEM]
    Sonder Piskie 31.8mm / 55mm

    +$0.00

    Forks

    RockShox Pike [OEM] / 29 / 140mm
    RockShox Pike / 29 / 140mm Default Title

    +$0.00

    RockShox Pike Ultimate [OEM] / RC2 / Charger 3.1 / 29 / 140mm
    RockShox Pike Ultimate / RC2 / Charger 3.1 / 29 / 140mm Default Title

    +$0.00

    Cane Creek Helm MK2 Air [OEM] / 29 / 140mm
    Cane Creek Helm MK2 Air / 29 / 140mm Default Title

    +$0.00

    Shock

    Rockshox Deluxe Select / 210 / 50
    Rockshox Deluxe Select / 210 / 50 Default Title

    +$0.00

    Rockshox Deluxe Ultimate / 210 / 50
    Rockshox Deluxe Ultimate / 210 / 50 Default Title

    +$0.00

    Cane Creek DBair IL / 210 / 50
    Cane Creek DBair IL / 210 / 50 Default Title

    +$0.00

    Tubes

    Nutrak Inner Tube / Presta / 29 / 2.2-2.5
    Nutrak Inner Tube / Presta / 29 / 2.2-2.5 Default Title

    +$0.00

    Tubeless Tyre Upgrade and Setup
    Tubeless Tyre Upgrade and Setup Default Title

    +$64.99

      3

      Select Accessories

      Edit

      Bottle Cages

      No Bottle Cages
      No Bottle Cages Default Title

      +$0.00

      Sonder Buzz Wire
      Sonder Buzz Wire Single

      +$0.00

      Sonder Buzz Wire
      Sonder Buzz Wire Pair

      +$0.00

      Front Lights

      No Front Light
      No Front Light Default Title

      +$0.00

      Tau Rear
      Tau Rear Rear

      +$24.99 +$24.99

      Tau Rear
      Tau Rear Front

      +$22.49 +$19.99

      Tau Front
      Tau Front Front

      +$24.99 +$24.99

      Phase 550
      Phase 550

      +$34.99 +$32.49

      Phase 850
      Phase 850

      +$49.99 +$47.49

      Ariel
      Ariel Ariel

      +$64.99 +$59.99

      alpkit hadron bike light
      Hadron

      +$139.99 +$124.99

      Rear Lights

      No Rear Light
      No Rear Light Default Title

      +$0.00

      Tau Rear
      Tau Rear Rear

      +$24.99 +$24.99

      Tau Rear
      Tau Rear Front

      +$22.49 +$19.99

      alpkit halo rear bike light
      Halo Light Black

      +$29.99 +$27.49

      Lights Accessories

      No Bike Light Accessories
      No Bike Light Accessories Default Title

      +$0.00

      Universal Helmet Mount
      Universal Helmet Mount Black

      +$14.99 +$12.49

      alpkit cockpit bike light gps mount
      Garmin Outfront Mount / Black

      +$34.99 +$24.99

      Mudguards

      No Mudguards
      No Mudguards Default Title

      +$0.00

      sonder fender
      Sonder Fender Front MTB

      +$7.49

      SKS Commuter Mudguard Set
      SKS Commuter Mudguard Set 28 / 45mm / Black

      +$31.99

      Pedals

      No Pedals
      No Pedals Default Title

      +$0.00

      distortion flat mountain bike pedal
      Sonder Distortion

      +$0.00

      reko clipless bike pedal
      Sonder Reko

      +$0.00

      contact clipless road bike pedal
      Sonder Contact Default Title

      +$54.99 +$44.99

      sonder slingshot clipless pedal
      Sonder Slingshot Default Title

      +$129.99 +$44.99

      Sonder Torque
      Sonder Torque Black

      +$57.49 +$49.99

      distortion flat mountain bike pedal
      Sonder Distortion Default Title

      +$99.99

      reko clipless bike pedal
      Sonder Reko Default Title

      +$109.99

        Initial Price

        Cortex GX Eagle Transmission / Select a frame...
        $3,749.00

        Extras

        $0.00

        Total Price

        $3,749.00
        Built to Order. Be Riding Next Week

        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 GX Eagle Transmission

        GX Eagle Transmission is ready to go toe to toe with anything, perfect shifting that’s unapologetically robust. It’s simply the most dependable drivetrain we’ve ever created, built to hold its own on any trail and outlast the rest, even with the added power of a motor. GX Eagle Transmission is even rebuildable to keep working season after season. Forget the old excuses, this is the new people’s champion for all-in, all-day rides.

        Your actual build date will depend on additional components you specify and from receipt of full payment. For any queries contact our Sonder team on +44 1773 417006.

        • Cortex GX Transmission in Storm Blue
        • Cortex GX Eagle Transmission
        • Cortex SLX in Mint