Bicycle Seatpost Adapter for Classical Bicylce Trailer Hook
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Allows to attach a bicycle trailer hook to modern bicycles without the classical screw for seatpost height adjustment.
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
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- Creative Commons — Attribution — Share Alike
Modern Bicycles don't have that particular screw your grandad's bicycle had for height adaptation of the seatpost. But that's the exact place where the (classical) bicycle trailer hook attached to. Dang!
At least here in Germany that type of trailer hook was the de-facto-standard for bicycle trailers before the 2000s or so. Not sure if other countries share this :-)
If your bicycle lacks that screw, but you still want to attach that a classical trailer hook this adapter may be a thing for you.
It friction fits onto a 27mm seatpost using two M4 screws.
On the other side of the adapter you can screw on the trailer hooking an M8 screw.
The seatpost opening is a little angled - to account for the angle most seatposts have. But that is not an exact measure. Also: Trailer hooks from different vendor differ in the exact size. But with a little force on the M8-screw they all fit…
I've printed mine in ABS with a high amount of infill. I have towed up to 100kg on my small trailer with it - without any problem for the adapter.
I've had it on my bike for about 6 years without any degradation of the material.
Material needed:
- Friction fit:
- 2x M4 screw, approx 30mm long
- 2x M4 self locking nuts
- Trailer Hook:
- 1x M8 screw, approx 40mm long
- 1x M8 self locking nut