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    • Buy Now

    Cortex Deore

    Short travel 29er

    €2.599

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    2

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    3

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    Fast and agile short travel full sus 29er mountain bike with Shimano Deore 1x12 groupset, Rockshox Recon Silver RL fork and Deluxe rear shock
    Buy Now. Be Riding in 5 days.

    1

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    • Size
    • 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 780mm

    +€0,00

    Saddle

    Sonder Abode [OEM]
    Sonder Abode Black / 138

    +€0,00

    Sonder Kura [OEM]
    Sonder Kura

    +€44,99

    Sonder Zone [OEM]
    Sonder Zone 152 / Black

    +€39,99

    Seatpost

    Sonder Seatpost [OEM] /
    Sonder Seatpost / 31.6mm / 400mm

    +€0,00

    X-Fusion Manic Drop Seatpost and Lever
    X-Fusion Manic Drop Seatpost and Lever 31.6mm / 170mm

    +€139,99

    RockShox Reverb / 150mm Drop / 31.6 x 440mm
    RockShox Reverb / 150mm Drop / 31.6 x 440mm

    +€199,99

    RockShox Reverb / 125mm Drop / 31.6 x 390mm
    RockShox Reverb / 125mm Drop / 31.6 x 390mm

    +€64,99

    Cane Creek eeSilk+ [OEM] / 31.6mm / Alloy
    Cane Creek eeSilk+ / 31.6mm / Alloy

    +€224,99

    Stem

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

    +€0,00

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

    +€0,00

    sonder talo bike stem
    Sonder Talo 35

    +€49,99

    sonder talo bike stem
    Sonder Talo 45mm

    +€49,99

    Forks

    Rockshox Recon RL Silver / 100mm / 29
    Rockshox Recon RL Silver / 100mm / 29 130mm / 29er

    +€0,00

    Rockshox Revelation RC / 29 / 130mm
    Rockshox Revelation RC / 29 / 130mm 29 / 130mm

    +€209,99

    RockShox Pike Ultimate RCT3 /
    RockShox Pike Ultimate RCT3 / 29er / 130mm

    +€449,99

    Cane Creek Helm MK2 Air / 29 / 130mm
    Cane Creek Helm MK2 Air / 29 / 130mm 130mm

    +€434,99

    Shock

    Rockshox Deluxe Select+ / 190x45
    Rockshox Deluxe Select+ / 190x45

    +€0,00

    Cane Creek DBair IL
    Cane Creek DBair IL 190 / 45

    +€129,99

    Tubes

    WTB [OEM] Inner Tube / 29 / 2.4 - 2.8
    WTB Inner Tube / 29 / 2.4 - 2.8 Black

    +€0,00

    Tubeless Tyre Upgrade and Setup
    Tubeless Tyre Upgrade and Setup

    +€49,99

    Wheels

    Sonder Nova 29 [OEM] Wheelset / UK Build
    Sonder Nova 29 Wheelset / UK Build Microspline

    +€0,00

    Sonder Alpha 29 [OEM]
    Sonder Alpha 29 HG

    +€169,99

    3

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    Edit

    Bottle Cages

    No Bottle Cages
    No Bottle Cages (none)

    +€0,00

    Sonder Buzz Wire
    Sonder Buzz Wire Pair

    +€10,99

    Lights

    No Lights
    No Lights (none)

    +€0,00

    Alpkit Phase 400 rechargeable bike light
    Phase 400

    +€0,00

    Alpkit Boson rechargeable bike light and hand torch
    Boson

    +€0,00

    Lights Accessories

    No Bike Light Accessories
    No Bike Light Accessories (none)

    +€0,00

    Mudguards

    No Mudguards
    No Mudguards (none)

    +€0,00

    sonder fender
    Sonder Fender Front MTB

    +€5,99

    Pedals

    No Pedals
    No Pedals (none)

    +€0,00

    Sonder Torque
    Sonder Torque Black

    +€39,99

    reko clipless bike pedal
    Sonder Reko

    +€69,99 +€59,99

    sonder slingshot clipless pedal
    Sonder Slingshot Black

    +€74,99

    Initial Price

    Cortex Deore / Select a frame...
    €2.599,00

    Extras

    €0,00

    Total Price

    €2.599,00
    Buy Now. Be Riding in 5 days.

    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.

    At a glance

    • Shimano Deore M6100 12-speed groupset
    • Rockshox Recon Silver RL fork
    • Rockshox Deluxe Select+ shock
    • Sonder Nova 29" Uk made 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.

    Why Deore?

    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.

    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 Recon Silver RL | 130mm (travel)
    Shock:RockShox Deluxe Select+ | 190 x 45
    Headset:FSA Orbit C-40-ACB
    Groupset
    Shifters:Shimano Deore M6100 | 1x | 12-speed
    Brakes:Shimano Deore M6120 | Hydraulic | Post mount
    Rotors:Shimano RT66 | 180mm (front), 160mm (rear) | 6-bolt
    Rear derailleur:Shimano Deore M6100 | Long cage | 12-speed
    Chainset:Shimano Deore M6100 | 170mm | 32t
    Cassette:Shimano Deore M6100 | 10-51t | 12-speed
    Chain:Shimano SLX | 12-speed
    Bottom bracket:Shimano BB52 | 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:Sonder Seatpost | 31.6mm
    Saddle:Sonder Abode
    Grips:Sonder Clutch | Black
    Weight
    Frame:XS: TBC S: 1.75kg; M: 1.83kg; L: 1.94kg; XL: 1.99kg; (Plus fork: 0.45kg)
    Build:XS: TBC 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

    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.

    Size recommendations

    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 +

    Size recommendations

    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 540540
    Frame Spec

    Alloy 29er short travel full suspension trail bike

    Weight: S: 2.8kg; M: 2.9kg; L: 3.0kg; XL: 3.08kg (without shock)
    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

    • sonder cortex in battleship grey gx axs pike
    • sonder cortex in khaki gx axs pike
    • brown
    • crayon