I intend to have a trip along Canal du Midi during the summer for at least 3 days with friends of mine and using backpacks or racks did not seem to be very pratictal. The idea of a trailer in which you can easily put the tent mattress and any stuff you want came to me.
Step 1: 1 or 2 wheels ?
As the road will be a single track for many kilometers, a single wheel trailer seemed to be the best solution.
I discovered two main trailer constructors:
- Bob (http://www.bobgear.com/ )
- Aevon (http://www.aevon-trailers.com/)
These constructors use different fixing solutions. Bob trailers use rear axle fixation whereas Aevon ones use seat tube solution.
I decided to make a trailer as similar as possible to the Aevon trailer.
Step 2: Material collection
- 8 meters of 1cm square steel tube (less than 1kg per meter)
- 2 meters of 2,2 cm square steel tube
- 0.5L of shiny black paint
- 2 “heavy duty” axles
- a 16” wheel
- 1 forch from a 16” bike with its mudguard
- 2 meters of used round tubes (old badminton poles)
- Steel offcuts
Total cost : 30€
Step 3: Central section assembly
- Bottom part of 78 cm
- Front part of 44 cm
- First part of the shaft of 35 cm
- Second part of the shaft of 42 cm
Step 4: Trailer hitch
The first solution, retrieved from this instructable (http://www.instructables.com/id/SURF-FISHING-CART-TRAILER/step9/Trailer-Hitch/) consisted in using a caster wheel as a hitch. The result was not satisfactory on a single wheel trailer. The trailer was not horizontal, it was inclined on the left.
The final solution is an homemade solution consisting of 2 X 4cm round tubes perpendicularly welded, forming a crosspiece. The vertical part is on bike side and the horizontal one on trailer side.
On bike side, a steel piece has been welded in order to attach the vertical axle. This piece is fixed to the seat tube using 2 U-shaped screws. In order not to deteriorate the seat tube, some inner tube piece has been placed between metal parts and the seat tube.
On trailer side, two perforated iron parts have been welded on the trailer shaft to receive the horizontal axle.
Step 5: Removable shaft
Step 6: Trailer pannier frames
- 76 cm x 40 cm bottom frame
- 112 cm x 40 cm top frame
Both frames are linked with :
- 2 x 40 cm sections on front side of the trailer
- 2 x 25 cm sections on rear side of the trailer
The resulting pannier was welded to the 2cm square central axle of the trailer.
At the bottom of the pannier, 2 sections of 38cm were welded in order to consolidate the trailer.
On both sides, 2 round tubes were riveted on the trailer to prevent the bags from falling of the trailer.
When all parts were welded, I brushed it then painted it shiny black.