• Clearance

  • Cortex / X-Large
  • Cortex / X-Large
    • Cortex / X-Large
    • Cortex / X-Large

    Cortex / X-Large

    Ex demo / short-travel 29er

    £1,999 £2,449

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

    Pre-order now for delivery. We'll keep you up-to-date with your order progress and despatch as soon as it is available.

    • Free Delivery over £50

    • Free Returns


    At a glance

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

    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.

    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.


    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.

    Geometry and 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 +


    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: 2.73kg; 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)