Double Choc

Huck to flat, and pedal back up. The Double Choc is the bike for big lines, big trails, and big ups. From backyard trails to alpine tracks.

Build it up, build it down, the Double Choc is a chameleon. Push the bike all the way up to 160/148mm travel for a big bruiser of a mountain bike, ready for bike parks and all the chunder-trails you can dream up. Turn the dial down and build the bike up with 140/136mm travel for a do-it-all trail bike, ready for all the ups and downs of trail riding. Push the front, huck it into oblivion.

With its versatile geometry, the Double Choc adapts seamlessly to every ride, making it the ultimate companion for both aggressive descents and technical climbs. The robust frame and advanced suspension system ensure a smooth ride, absorbing every bump and drop with ease. Whether you’re tackling rugged mountain paths or flowing singletracks, this bike’s customizable setup lets you dial in the perfect performance.

All of this, built by hand in Saxony!

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From Trail to Enduro

We love backyard trails, but we also take off to the mountains as often as possible, so having a platform you can customize to your own geography and riding style is important.

The Double Choc can be built up with 136mm or 148mm rear travel. This means that you can build up a short-er travel trail ripper for those quick-bites or go all the way up to 160/148mm for those really big days out!

Gussets and reinforcements on the 4130 steel frame mean no matter how big you go, we’ve got you covered!

Steel? Horst Link? Hell yes.

Not only do we give you the simple beauty of the Horst-link, the Double Choc also features all the threads, bolts, and measurements to make maintenance as easy as possible.

Nothing worse than having to search out hard-to-find parts and bearings to keep your bike running. We went with the most obtainable parts we could imagine without sacrificing serviceability. We’re not saying you should run bearings from the local hardware store when on vacation in the Alps, but you could!

140-160mm Fork. 136/148mm Rear Travel. Three-Position Flip Chip

Shop the Double Choc in our online store!



Sour Bicycles 4130 CrMo frame welded by hand in Saxony, featuring heat treated, multi-butted tubing.

The bottom bracket is a custom part designed by Sour and fits a standard 73mm BSA threaded bottom bracket. The headtube is also a Sour-specific design.

The rear triangle is 7075 T6 aluminum and is made by Actofive in Dresden. SRAM UDH derailleur hanger and Transmission-ready.

The seat clamp is designed in-house and is integrated into the frame. Should it ever fail, the frame can be professionally modified to use a traditional clamp, if repair of the original clamp is not possible. We have never seen one fail.

By the numbers:

Headtube: EC44/ZS56 tapered headtube
Bottom bracket: 73mm BSA bottom bracket
Axle: 12mm x 148mm thru axle (Syntace X-12)
Seat post: 31.6mm
Brake standard: PM180 Direct. More info here.
Fork travel: 140-160mm
Wheel size: M/L/XL 29″
Tire clearance: up to 2,5″
Tubing: Custom drawn, multiple butted, partly heat treated SOUR 4130 CrMo (we love steel)

Bonus facts and features:

SRAM UDH derailleur hanger and Transmission-ready
Recommended tire size 2,2″ – 2,4″
External downtube cable routing
One water bottle braze-on, one tool holder braze-on (top tube)
Optional second bottle braze-on and top tube bag braze-on
Low standover height
CNC’d bottom bracket for better power transfer (go fast)
CNC’d and welded rocker for control (don’t crash)
Maximum chainring size: 34t

It’s all in the details

We’ve tried to make all the details of the Double Choc as straight forward as possible so know you what you’re getting into. Still not sure? Just drop us an email!

Suspension DesignHorst Link
Seat Post31.6mm
Seat ClampIntegrated
Eye to Eye length210mm
Stroke55mm / 50mm (136mm)
Fork Compatibility140-160mm
Fork Offset44mm
Brake MountPM 180mm
BB Shell73mm Threaded
Max Tire Size2.5″
Max Chainring Size34t
Water Bottle Mounts1 + 1 Tool Box
Shock Mounting Bushing Front20×8
Shock Mounting Bushing Rear20×8

Below is the sample weight of a size medium Double Choc. This weight does not include powdercoating, but please keep in mind that your chose powdercoat may be heavier than the average coating we use. Fades, gradients, and metallic colours can weigh more than single solid colour. If you are interested the final weight, please get in touch. We apply an inside wax coating before shipping the frame to your door that will add additional weight.


A Sour Cowboy Cookie frameset weighs 3.48 kg with all it’s small parts and suspension pivots, bearings, and bolts installed. This weight is excluding powdercoat which will add between 50g and 200g depending on your color choice.

Included with your frame

Included with your Double Choc frame or frameset are all small parts, cable guides and bolts to build your bike. You get a rear thru-axle of course, and if you’re ordering a frameset, you get a front axle with your fork as well. Headsets are only included if you add one to your order.

We are currently working on more options for the Cowboy Cookie, but currently we offer some amazing options from Fox and Manitou that work perfectly with our suspension design. If you have any questions about tuning or clearance, feel free to drop us an email.

You can add a rear shock and other parts at check out.

Check out the next drop-down for all the suspension characteristics, you kinematics-sniffer!

Flip Chip Settings

Geometry is based on the high position

Geometry modification by Flip Chip:
Head Angle -0.3°  / Seat Angle -0.47° for LOW
-5mm BB height