Sold Out! Thanks everyone who bought a pre-order Bad Granny! We sold out of these in one weekend… wild!

All Sour Bicycles frames are made by hand, one-by-one, in our own facility in Saxony, just outside of Dresden. We use custom tubing designed and drawn for our frames, it’s a multi-butted heat-treated CrMo steel that’s ready to stand the test of time. All our steel is produced from a partially recycled product and drawn by one of the worlds leading production facilities in Taiwan, the beating heart of the worlds bicycle production.

Our dropouts are designed in-house in Dresden and have a replaceable derailleur hanger.

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: 44mm, ZS44/EC44
Bottom bracket: 73mm BSA with eccentric shell for singlespeed
Rear spacing: 12mm x 148mm Boost, thru axle
Seatpost: 31.6mm
Rear brake: IS2000 disc
Fork travel: Rigid, but will accept 80mm – 100mm
Wheel sizes: 27.5″ or 29″
Tire clearance: 27.5 x 2.4″, 29 x 2.4″

Bonus facts and features:

Stealth dropper post cable routing
Second toptube for better power transfer (go fast)
Rigid fork with SAG-o-meter for comfort and precise steering (don’t crash)
Raw and rusty everything


Bad Granny Raw Limited Edition Information:

We take pride in our expertise in powder coating colors and their application. Although we have always declined requests for completely raw frames (even our “raw” frames come with a special clear powder coat), for this limited run, we have decided to let nature take its course.

The frame, fork, cranks, and even handlebars are completely raw steel, they will rust. None of these parts will ever been sold as raw again.

Rust is your friend. With raw steel, a little love now and again will help develop a beautiful patina while also avoiding problems in the long term.

To protect the inside of the frame, we always apply a wax coating, we do this to all Sour frames. However, the outside of the frame and parts will be left raw. To preserve these parts, we will provide a bottle of Sour Frame Oil, a perfect blend of love and linseed oil.

Bad Granny Steel Fork

Axle: 15mm x 110mm Boost thru axle
Brake standard: IS2000 disc brake
Tapered Steerer Tube 1½” – 1⅛”
Rake: 50mm
Fork length: 490mm
Max. tire dimension 29“ x 2.4“
4 eyelets per fork leg

Included with your frame

Included with your limited Bad Granny frameset is all the small parts to run any cabling you wish and a derailleur hanger. You get a rear thru-axle and a front axle with your fork as well. Headsets are not included in your order but if you need one right away give us a shout!

  • Frame includes eccentric bottom bracket, derailleur hanger (derailleur/singlespeed), axle and (integrated) seat clamp
  • Sour Bicycles Party Fork
  • Brainfart Industries CrMo Handlebar including brazed on dropper post lever (size specific width of 800/820/840, 16° backsweep and 6° upsweep)
  • Cyber Cycles Steel Crankset (160/165/170mm possible), raw
  • Actofive Chainring, 32t silver

Delivery time: Build On Order - Delivery time to germany is 75-90 days after the order window is closed.


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