Building a tiny bike: Wasp

The base frame

The foundation of the build was a tiny clown bike manufactured some time in the early 2000s under the name "Mikro-bike". The marketing website from 2002, archived via WayBack Machine is available here. My particular bike came with a new seatpost and a worn rear wheel (solid rubber!) following years of enjoyment under its previous owner. It also had a coaster brake. The whole package was had for 30 GBP delivered.

Since the bike used all standard sized components (e.g. 1" threaded headset, standard full-suspension pivot sizing, etc.) it was quite easy to ponder the myriad ways it could be modified! I had a long think and quickly sketched out a design that appealed to me!

It had to have

Extra parts

N&T Single Speed Chain Tensioner 6.59 GBP
KMC B1 Silver Chain 112 Links - 1/2" x 1/8" 5.73 GBP
Messingschlager Crankset, 32 teeth steel black 100mm crank length 7.90 GBP
22.2mm folding quill stem (length 390mm) with 25.4mm handlebar clamp 14.00 GBP
12" wheelset with Velosteel single speed coaster brake hub -- ISO 203-19 34.12 GBP
12" Schwalbe bent-valve inner tubes x 2 7.95 GBP
12" Schwalbe Black Jack tire x 2 7.38 GBP
20" full-suspension child bike frame 33.99 GBP

Final cost: 147.66 GBP or about 30 pints worth of beer, though I would say this project was more worthwhile than its beer equivalent!

Modifications done

First round of modifications was done when the donor full-suspension frame arrived; it looked quite silly:

The bike was fleshed out after the rest of the bits arrived!

Manchester June Critical Mass

The final part came just in time for the build to be completed for the June 2017 Critical Mass! Unsurprisingly it got quite some attention from everyone who had a glimpse. What was more odd was how easy it was to slip under the radar of other cyclists, even at critical mass speed, while riding amongst them; a lower silohouette than they're used to looking out for?

Rear view of the drivetrain and folding animation

More updates coming...