Hello Space Cake!

The new all-road bike from Sour is designed to take you further, faster.

The Space Cake can take you anywhere the roads go – “road,” of course, being more of a theory than a rule..

For the last five years, Sour had this itch that something was missing. Deep in the back of their minds, they knew that a road-plus bike – something fast and efficient but still built to get weird when the road turns rough – would be the perfect addition to the lineup. It took time to nail down the right geometry, tubing, and design details to create a bike that stayed true to Sour’s adventurous spirit.

Now, after countless prototypes and test rides, the Space Cake is here: a road bike that blends speed with the durability to tackle all roads, whether they’re paved, or “paved”.

Roads are just a suggestion

The Space Cake may be the most “road” bike Sour have ever made, but don’t be fooled – it’s still got a bit of that playful spirit Sour is known for. With geometry that’s tuned for long road days but a durability that says ‘bring on the rough stuff,’ it’s made for for when that perfect stretch of asphalt turns into an irresistible gravel path. Ride farther, ride faster, and don’t be afraid to get a little adventurous.

Road bikes are a lot different than they used to be. Gone are the days of skinny tires! In an era where usability reigns supreme, the Space Cake is king. Sour designed this bike to do go farther than you thought you could, and carry you back home too.

The Ultimate All-Road Weapon

This is Sour’s take on a road bike – light, responsive, and built for speed, but not afraid to ignore the rules. It’s for the roadies who like to get a little weird, the MTB riders looking for a fast training machine, and anyone who sees a gravel detour as an opportunity, not an obstacle. So, go ahead: hit the smooth stuff, seek out the rough patches, and leave the route up to your imagination.

It’s been a long time coming, building an all-road bike. No joke, it’s been in the planning hopper for more than three years at this point. All that goes to say that when Sour finally made the step, went “full-roadie”, they really wanted to do it right, and do it their own way!

Looks fast, goes anywhere.

Why choose between speed and style? Like every Sour model, the Space Cake comes with a signature custom powder coating, so your bike can turn heads on the tarmac or the occasional gravel detour. Bold, classy, or a little offbeat—it’s up to you. After all, just because you’re chasing KOMs doesn’t mean you can’t look good doing it.

Don’t lie, going fast is really, really fun. While going fast is sometimes also really, really hard, the Space Cake makes it as easy as possible. Sour designed tubing and frame parts to be as light and efficient as possible. Plus, you’ll be able to full-send every bit of gravel on the weekly group ride, so you can always close that gap if you need to!

Made to Go the Distance

Designed with endurance in mind, the Space Cake is all about going longer and pushing your limits. With a road-focused frame built to handle big miles, it’s comfortable, light, and efficient enough to keep you smiling through epic rides. Whether you’re leading the pack on a group ride or setting out solo for some solid-state training, this bike is here for the long haul.

Sour love mountain biking, it’s at the core of their DNA, but just as any well-adjusted mountain biker will tell you, a touch of endurance never hurt your berm-slashing game. All-road bikes and gravel bikes are at the heart of the Sour off-MTB-season riding – filling in the gaps between wet and dry season, fitness gaps, or just the gap between your home and the office!

Details of the Sour Bicycles Space Cake Frameset

Space Cake frame

• Sour Bicycles frames are made by hand, one-by-one, in their own facility in Saxony, just outside of Dresden
• Custom tubing designed and drawn for the frames, it’s a multi-butted heat-treated 4130 CrMo steel that’s ready to stand the test of time
• Steel is produced from a partially recycled product in Germany and drawn by one of the worlds leading production facilities in Taiwan
• 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. Sour has never seen one fail.
• Headtube: 44mm upper and lower
• Bottom bracket: External 68mm T47 threaded bottom bracket
• Thru Axle: 12mm x 142mm thru axle
• Seat post: 27.2mm
• Brake standard: Flat Mount FM160 Direct
• Wheel size: Size S-XL 700C
• Tire clearance: up to 38mm
• Fender and rack mounts
• Recommended tire size 28mm – 38mm
• Two water bottle mounts inside frame
• AXS/Di2 ready cable routing
• Internal brake hose routing
• External mechanical cable routing
• SRAM Transmission compatible dropouts (“UDH”)

Space Cake Carbon Fork

The perfect fork to pair with a pack-light-travel-fast Sour Space Cake build. Sour love the versatility of their Space Cake frame, and this fork is just the cherry on top. Ready for those extra long rides, but minimal enough for all the day-to-day grind. Perfect.

• Material: UD Carbon
• Maximum Tire Width: 38mm
• Axle to Crown Length: 389mm
• Rake: 45mm
• Tapered Steerer Tube 1 ½“ –  1 ⅛“
• Thru-axle: 12 x 100mm
• Flat-mount Brake Mount: 140/160mm
• Fender Mounting Possible
• Weight with full length steerer and axle: ±515g

Included with your frameset

• Space Cake frame & Space Cake fork
• All the grommets and small parts to run any cabling you wish and a derailleur hanger
• Rear thru-axle
• Front thru-axle