2 Bikes = a Quad ....by www.gaerlan.com
Kickstands not required on this quad. The connecting tube that attaches to the seat tube allows the bike to standup by itself. Wondering what the bucket at the rear is for ? It's to carry our homebuilder's dog !
The most impressive feature on this bike is its drivetrain system. A front chainring drives an intermediate cluster with a derailleur. A shaft goes through the cluster where the turning motion is transmitted to each side. A freewheeling clutch mechanism on each side (see red arrows) allows the outside wheel to receive more power than the inside wheel when going on a turn.