Do it yourself 4 wheel cycles

REAR GEAR

Mount the drive wheel a bit sideways, so it is possibly parallel with the longitudinal profile (A). It is possible because of the jag in the wheel carriers (E,F). It might be even a better solution to make wheel carriers (E,F) parallel with (A).

Click image to enlarge - free plans for 4 wheel pedal bike

We had problems with the chain, falling down on the smaller gear, so we made a shield from 3 mm Aluminium with a hole inside (W), to prevent it. Than we also mounted an L aluminium profile (Z) on it to prevent the chain on the bottom side to move left-right.

Chain shield of do it yourself 4 wheel cycles

Click image to enlarge - Do it yourself 4 wheel cycles

You need a custom length chain. Take two chains of the same type and mount them together with a special key, you should find in some specialised bicycle shops.

Click image to enlarge - free plans for home made pedal car

Don't forget: the gear should be parallel with the longitudinal profile (A) - otherwise it's very possible the chain will keep falling from the gear!

This sites are just information about what we did. The vehicle is not done by any safety standards and can be life dangerous when producing or using it. You are free to use our design and ideas in part or in whole, but you do it absolutely on your own risk and responsibility!
If using it commercial, you must cite the source: "Designed by www.spiller.si":

INTRODUCTION
DIMENSIONS
CHASSIS FRONT WHEELS
REAR WHEELS
STEERING
STEERING WHEEL
PEDALS
FRONT GEAR
REAR GEAR
SEAT
BREAKS
LINK
OTHER LANGUAGES