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  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
  • Cortex / Medium
    show more
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    • Cortex / Medium
    Sonder Bikes Ready to Ride Deals

    Cortex / Medium

    Short-travel 29er

    £1,799 £2,349

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

    Pre-order now for despatch from . 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

    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 SRAM NX Eagle?

    SRAM Eagle drivetrains are designed, engineered and manufactured to work as complete drivetrain systems. Its 1x drivetrain is a solution that is built to be lightweight, strong and intuitive, with the gear range to ride on any terrain.

    NX Eagle provides the same Eagle performance benefits as the rest of the Eagle family. Slotting in just under the higher priced GX, the main differences are extra weight and the 11-50 range is not as wide as the 10-50 offered with GX, but functionally NX is 12-speed and fully compatible with SRAMs Eagle groupset.

    **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.

    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)