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Sonder Cortex Short-travel 29er full suspension mountain bike for epic days over mixed terrain

Fast and agile, Cortex is for epic days over mixed terrain. It comes alive on long technical descents with 120 mm travel, big wheels and a stiff responsive frame.

Sonder Cortex SX Eagle Recon

Fast and agile short travel full sus 29er mountain bike with SRAM SX Eagle, 1x12 groupset, Recon fork and Deluxe rear shock

£1499.00

Sonder Cortex NX Eagle Recon

Fast and agile short travel full sus 29er mountain bike with SRAM NX Eagle, 1x12 groupset, Recon fork and Deluxe rear shock

£1699.00

Sonder Cortex NX Eagle Revelation

Fast and agile short travel full sus 29er mountain bike with SRAM NX Eagle, 1x12 groupset, Revelation fork and Deluxe rear shock

£1899.00

Sonder Cortex GX Eagle Revelation

Fast and agile short travel full sus 29er mountain bike with SRAM GX Eagle drivetrain, Revelation fork and Deluxe rear shock

£2199.00

Sonder Cortex GX Eagle Pike

Fast and agile short travel full sus 29er mountain bike with SRAM GX Eagle drivetrain, Rockshox Pike fork and Deluxe rear shock

£2399.00

Sonder Cortex GX Eagle Cane Creek

Fast and agile short travel full sus 29er mountain bike with SRAM GX Eagle drivetrain and Cane Creek Helm fork and DBIL rear shock

£2599.00

Sonder Cortex Frame and RS Deluxe Shock

Fast and agile short travel full sus 29er mountain bike with Rockshox Deluxe rear shock

£999.00

Sonder Cortex Frame and DBIL Shock

Fast and agile short travel full sus 29er mountain bike frame with Cane Creek DBair IL rear shock

£1099.00

Sonder Cortex Frame with DBIL Shock and Helm Fork

Fast and agile short travel full sus 29er mountain bike frame with Cane Creek Helm-Air fork and DBair IL rear shock

£1899.00

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.

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.

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Frame spec

Alloy 29er short travel full suspension trail bike

Weight (kg): S: 2.73; M: 2.91; L: 3.05; XL: 3.11
Hydroformed and custom butted alloy frame tubing
Internal cable routing
Rear Shock: Rockshox Deluxe Select+ 190 x 45 mm
Horst link suspension layout
120 mm rear travel; 130 mm fork travel
Clearance for up to 29” x 2.6 in wide tyres
73 mm BSA threaded bracket shell
148 x 12 mm 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)

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.

Generally we recommend:

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 540 540 540 540

Custom Options

Swapouts and Upgrades

You can interchange Love Mud components on this build at no additional cost. So if you want a different length of stem, a particular saddle or bar then let us know in the notes section in the checkout and we'll get in touch. We also hold big stocks of SRAM, Rockshox, WTB and regular build with Shimano, Hope, Cane Creek. We'll build your Sonder with any part that suits your needs. Give us a call, with the same experienced mechanic helping throughout your build you know who to call if there's anything you want to know.

Click here for more information

Faqs

Support

Alpine Bond Warranty

We offer a 10 year guarantee on both our handmade titanium and Reynolds steel frames. Our hand welded 6061-T6 alloy triple butted frames and carbon frames come with a 5 year manufacturing defect warranty. All our bikes are built, checked and signed off by Cytech trained mechanics before being despatched to you in a custom-made bike box.

Kudos

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