first trip

Hi i have a xiongda motor and none of the nuts on of trailer fit on that so i have been suggested to build a piece of metal to fix on the bike and frome there add the regular attachement from the trailers.
i have never done something like that . Someone suggested me to use the holes on my bike to fix a 1 #8 one eighth of a inch of metal plate.

is it a good idea and how to precisely drill the hole on the metal piece so that is perfectly aligned?

below is the proposed plan.

oldbobcat

Remember that your hitch has to pivot horizontally somewhere in the proximity of the rear wheel.

Andrew R Stewart 

Is your trailer a BoB brand one? The axle attachment images suggest it might be. If so the it seems that the new axle mounts will be a mix of using existing axle nuts and a custom machined "spool" that might be brazed/welded to the nuts. Someone with fabrication skills should be involved with this. Andy

Geepig

So, this design is out of the question?


With trailer hitch

first trip

well the bob nuts are round so would that work has a pivot device?

first trip

hi
ido not wich to mess with the axle since ill use a ebike motor hub xiongda. i want something that keeps the axle out of the equations.....

first trip

hi are you doing a joke ? it does not seem to be near the subject

Andrew R Stewart 

Look into the Burley trailer hitches for other ideas.

My main concern about having a plate bolted onto the drop out is the fairly small bolts and their strength. Andy

Geepig

Yes and no.

I am an R&D engineer in the automotive industry, and one of the two steps where we can fail to achieve a really good design solution is by taking things too seriously at the pre-design stage just because the solution appears to be important. The solution and the pre-design stages are completely separate, because the potential solution is multiple and unknown, therefore the vital element of the pre-design stage is to discard serious because any innovative idea is unknown by definition and, trust me, will generate comments like 'Are you serious?'. The key element to your great solution may be hidden within my apparently non-serious suggestion - just because I cannot see it does not mean that you or someone else will not

So, by the time I stand up before a board of directors and outline my innovative solution, I have moved from the non-serious to the serious stage.

first trip

hi i still have to provide a paper with the holes at the right place to someone for him to create it . he will ask me ok where do you want the holes to be? and what size have the holes to be . ? so the countour of the piece ok simple but how do i manage to draw the holes exactly where they should be ?

Iride01 

Don't the people that make trailers for bikes make mount's too?

If this is a completely home made DIY trailer, then why don't you look at what the makers of successful retail brands of bicycle trailers do. Then maybe you won't make the same mistakes they probably had to learn through experiment.

first trip

THey do make axles but i have a hub motor so i have to find a way to screw their nuts somewhere else. that is the best solution i have found.
Any idea how to correclty place the holes or if having big holes is a good idea?