Light tubing, a max of 45mm tires, and geometry for long days.

Clueless? Not sure where to go next? The Clueless will help you get lost!

The Clueless is your best friend for long days in the saddle on mixed surfaces. Whether those surfaces are gravel, asphalt, or just the roads between coffee stops, the Clueless is game. Fenders and lights, this bike will take you to the end of the world, or the office before 8am. Knobby tires and fast wheels and you can take on any ridiculous gravel route your chaotic friend has dreamt up.

All of this, handmade!

Fast and agile, but stable enough for when the road turns into a “road”.

The Clueless is designed for all rides and all roads, big or small, bumpy or as smooth as a pancake. The Clueless platform has been used as a daily driver, your trusty companion to get to work everyday, but also as a thoroughbred in gravel races throughout Europe and North America.

We gave the bike clearance up to 42mm tires, 38mm with fenders, to make this bike into a real Swiss army knife. This tire size combined with an agile geometry means the Clueless is calm when it needs to be, but will light up any forest track when asked to. Ace.

All the mod-cons, none of the headache.

Steel may be the “original” material to build bikes, but that doesn’t mean it has to be old fashioned. We have all the modern conveniences including internal cable routing, tapered headtube, and a threaded bottom bracket.

Our cable routing jumps out of the frame around the bottom bracket, out of sight, and then continues to the back of the bike externally. Not only does this make service easier, it also saves you a headache or two routing the rear brake and derailleur!

And as you’d expect, the Clueless gets all the smart details to run a rear rack, fenders, all the bottles, and even a fun rack if you purchase the frame with our aluminium adventure fork!

Shop the Clueless in our online store!



Handmade Sour Bicycles CrMo frame featuring heat treated, multi-butted tubing that’s ED-Coated for rust-proofing.

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.

By The Numbers

Headtube: EC34/ EC44 tapered headtube

Bottom bracket: 68mm BSA bottom bracket

Axle: 12mm x 142mm thru axle

Seat post: 27.2mm

Brake standard: FM160 Direct. More info here.

Wheel size: Size XXS-S fit 650b only, M-XXL fit 700c

Tire clearance: up to 42mm

Tubing: Custom drawn, multiple butted, partly heat treated SOUR CrMo (we love steel)

Bonus facts and features:

Fender and rack mounts

Recommended tire size 35mm – 45mm

Internal downtube cable routing

Three water bottle braze-on’s

Low standover height

Ovalized lower seattube section for better power transfer (go fast)

Ovalized toptube for comfort and precise steering (don’t crash)

Clueless Fork

The perfect fork to pair with a pack-light-travel-fast Sour Clueless build. We love the versatility of our Clueless frames, and this fork is just the cherry on top. Cargo cage mounts for those extra long rides, but minimal enough for all the day-to-day grind. Perfect.

Pictured is a 650b wheel. The fork is designed for 700c but can accept both.


Maximum Tire Width: 45mm
Axle to Crown Length: 402mm
45mm Rake
Straight Steerer Tube 1 ½“ –  1 ⅛“
Thru-axle 12mm x 100mm
Material UD Carbon

3 Cargo Cage Eyelets on Fork Legs (max. 3.5 kg per side)
Flat-mount Brake Mount 140/160mm
Fender Mounting Possible
Weight With Full Steerer and Axle: ±515g

Adventure Fork

Our Adventure Fork is the heavy lifter for gravel bikes. We made this fork from steel, our favorite material of course, because we wanted this fork to look rad, and be strong enough to take all of the gear with you.

The fork length is just a hair longer than average, which means you should pair this fork with a Zero-Stack (ZS) lower headset cup that bring the effective length to 405mm, just about perfect!


Maximum Tire Width: 60mm
Axle to Crown Length: 412mm
45mm Rake
Straight Steerer Tube 1⅛” x 300mm
Thru-axle 12mm x 100mm
Material Double Butted 4130 Steel

4 Cargo Cage Eyelets on Fork Legs
Internal Dynamo Cable Routing
Flat-mount Brake Mount 140/160mm
Fender Mounting Possible
Weight With Full Steerer and Axle: ±1210g

When chosen with a frame of full build we powdercoat the fork in the same color as the frame. Should you wish otherwise just let us know.

Below are the frame and fork weights for each size of the Sour Clueless. These weights include powdercoating, but please keep in mind that your chosen powdercoat may be heavier than the average coating we use. Fades, gradients, and metallic colours can weigh more than single solid colour powdercoat. If you are interested the final weight, please get in touch. Weights are averaged over three frames per size. We apply an inside wax coating before shipping the frame to your door that will add additional weight.

Clueless Size XS = 2281g

Clueless Size S = 2330g

Clueless Size M = 2394g

Clueless Size L = 2510g

Clueless Size XL = 2630g

Clueless Size XXL = 2750g

Clueless Carbon fork = 515g

*All weights averaged with 3 frames per size (±50g frame, ±20g fork)

Included with your frame

Included with your Clueless frame or frameset is all the grommets and small parts to run any cabling you wish and a derailleur hanger. 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.

1×12 Shimano GRX

Rear derailleur, Shimano GRX RX822

Crankset, Shimano GRX FX-RX610, 172,5mm with 40T chainring 

Shifters, Shimano GRX RX610 flatmount, and SM-RT64 rotors

Cassette, Shimano CS-M7100, 11-45t and a CN-M6100 chain

2X11 Shimano GRX

Rear derailleur, Shimano GRX RX810

Crankset, Shimano GRX RX600, 172,5mm, 47/30T chainrings

Shifters, Shimano GRX RX600 flatmount, and SM-RT64/RT70 rotors

Cassette, Shimano R7000, 11-32t, and a CN-HG601 chain

1×12 SRAM GX AXS Mullet

Rear Derailleur, SRAM GX Eagle AXS

Crankset, Easton EA90 172.5mm, 44t Chainring, Incl. Easton bottom bracket

Shifters, SRAM Rival AXS, Centerline X Rotors, 160mm

Cassette, XG-1275, 10-50t, and a PC GX Eagle chain

Battery and charger included


Wheelset built by hand with Duke Worldrunner 25 rims and Duke Bad Boy or Bitex hubs.

Complete Easton EA70 cockpit:

XS — 70mm stem; handlebar 400mm 16° flare; seat post 27,2x350mm; Easton bartape

S — 90mm stem; handlebar 400mm 16° flare; seat post 27,2x350mm; Easton bartape

M-L — 100mm stem; handlebar 420mm 16° flare; seat post 27,2x350mm; Easton bartape

XL-XXL — 110mm stem; handlebar 440mm 16° flare; seat post 27,2x350mm; Easton bartape

Saddle SQ Lab 611 Ergowave XS-L 140mm XL-XXL 150mm

Acros headset