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-   -   Bike Friday Trailer hitch (https://www.bikeforums.net/showthread.php?t=1122992)

gdlerner 09-24-17 10:47 AM

Bike Friday Trailer hitch
 
2 Attachment(s)
Hi fellows
I own a BF trailer never use it before I was thinking I will take it to my next adventure .
I wanted to tried it today and I can fit the hitch to my bike I own a Pocket Llama with rohloff external box gears and the hitch collapse with the external box see the pictures.
I wanted to change the hitch for the carry freedom lollypop and it s not working also because I need to drill a new hole on the lollypop ,because the holes in the trailer are from the side.
I was thinking maybe use this
Trailer Accessory - Trailers

get another hose for the trailer and in the hose put the elastomer llolipop
Carry Freedom Lollypop elastomer

What do you think or maybe another better idea?
Thank you

CliffordK 09-24-17 10:56 AM

What about using the Bike Friday hitch adapter.

https://store.bikefriday.com/product...qsrbprfeis0062

https://store.bikefriday.com/images//parts/18068.jpg

It should fit just ahead of where all the hub stuff is. I'm surprised it didn't come with your bike.

You might be able to get a local welder to make something similar if purchasing/shipping is too big of a hassle.

fietsbob 09-24-17 11:32 AM

Alternatives, A) spacer and a 145 tandem hub QR skewer,

B) Thule-Chariot ball and socket hitch.. Interesting to note the company you link to uses the chariot hitch on the carry-freedom city trailer..
http://shop.planet-used.com/shop/en/...railer-51.html its a perfect match there , (My Brompton tows It)

but the red lolly and pin on the Y frame..



C) Burly hitch

I have a Co Op era Burly Alternative hitch.. (I got 9 years ago) the hitch and QR are integrated into one item.

I have it on my Rohloff Koga world tour.. http://www.backcountry.com/images/it...LY0016/ALL.jpg

My BiFri Rohloff Llama has the brazed on fitting for the air hose connector , ( its a threaded sleeve brazed on the upper stay)

NB ( readers)you could have specified it be fitted on the order specs the frame and bike was built to..
( My bike, a refused BTO someone else ordered)





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gdlerner 09-24-17 12:28 PM


Originally Posted by CliffordK (Post 19883501)
What about using the Bike Friday hitch adapter.

https://store.bikefriday.com/product...qsrbprfeis0062

https://store.bikefriday.com/images//parts/18068.jpg

It should fit just ahead of where all the hub stuff is. I'm surprised it didn't come with your bike.

You might be able to get a local welder to make something similar if purchasing/shipping is too big of a hassle.

My bike didnīt come with the hitch adapter on the frame like other BF they forgot it and for this small peace 39 pluss shipping to Germany.... I will find somebody to build something will be much cheaper

CliffordK 09-24-17 12:35 PM

One of my bike friday bikes came with the 1/4" NPT pipe welded to the frame.

One came with that little adapter. I can take any photos you like, although you should be able to work on the dimensions from the tubing size on the bike.

I did use the adapter on my old Colnago, but it seemed to have worked itself loose on the tapered rear stay tubing. I believe the BF tubing doesn't have a taper, so that shouldn't be an issue.

CliffordK 09-24-17 01:33 PM


Originally Posted by gdlerner (Post 19883653)
My bike didnīt come with the hitch adapter on the frame like other BF they forgot it and for this small peace 39 pluss shipping to Germany.... I will find somebody to build something will be much cheaper

If you bought everything new from Bike Friday, Bike, Rohloff, & trailer kit as a single package purchase, and you're missing a part (or were sent incompatible parts), then I'd send them an e-mail and ask about the adapter.

It is quite possible they would just drop it in the mail for free.

The worst they can say is NO.

gdlerner 09-24-17 01:39 PM


Originally Posted by CliffordK (Post 19883751)
If you bought everything new from Bike Friday, Bike, Rohloff, & trailer kit as a single package purchase, and you're missing a part (or were sent incompatible parts), then I'd send them an e-mail and ask about the adapter.

It is quite possible they would just drop it in the mail for free.

The worst they can say is NO.

I already did but the trailer I bought it online used like new
Maybe I can just make an extension of the arm with a hose and put there the lollipot I will see

berlinonaut 09-24-17 02:10 PM

You can mount the Rohloff shiftbox the other way round (cables facing upwards) - I had to do this on one of my bikes. Looks like this could free enough space. A bit more of a change (but with success guarantee) would be to get rid of the external shiftbox completely and to switch the Rohloff to internal shifting.

gdlerner 09-24-17 02:24 PM


Originally Posted by berlinonaut (Post 19883819)
You can mount the Rohloff shiftbox the other way round (cables facing upwards) - I had to do this on one of my bikes. Looks like this could free enough space. A bit more of a change (but with success guarantee) would be to get rid of the external shiftbox completely and to switch the Rohloff to internal shifting.

:)I use to have internal shifting, one year ago I changed all my bikes to external much better and easy to fit on the road

gdlerner 09-24-17 02:55 PM

Or maybe I tried to adapt this hitch
https://www.amazon.com/Sunlite-Trail...+trailer+hitch

fietsbob 09-24-17 05:03 PM

SO? replace the 2 shift cables so the external shift box faces up* it will take a little more cable to reach the new location..

* Its Been Done.. read the Manual . its on page 32 'cable routing, external gear mech'..





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2_i 09-24-17 08:25 PM

What about Burley Hitch Adapter? Then you could stay with the BF hitch. Its disadvantage is an increase in the transverse size, but principally for BF there is so much dismantling anyway that you can take off the adapter for packing.

fietsbob 09-25-17 10:10 AM

its a nut with an extension He shows a QR Skewer, not the threaded TS axle..

invisiblehand 09-25-17 10:49 AM


Originally Posted by gdlerner (Post 19883653)
My bike didnīt come with the hitch adapter on the frame like other BF they forgot it and for this small peace 39 pluss shipping to Germany.... I will find somebody to build something will be much cheaper

This sounds like the best bet to me.

fietsbob 09-25-17 10:54 AM

The fitting is just an industrial air hose quick disconnect..

Brazed onto the frame is a tubular threaded ring, that should be easy for a metalworking fabricator to make..
the QR can be used to hold it down ...





....

zebede 09-25-17 11:30 AM

If I understand correctly, Pic number two shows the hitch mount, and you took the picture to show the conflicts.

Why don't you just put the hitch plate in a vise and put a bend in it so that the hose connector is farther away from the shift box, while keeping the plate flat around the axle QR area.

Alternatively, could the trailer tongue be reversed on the trailer so as it connects to the drive side of the bike , and therefore mount the hitch plate on that side?

2_i 09-25-17 11:26 PM


Originally Posted by fietsbob (Post 19885604)
its a nut with an extension He shows a QR Skewer, not the threaded TS axle..

The adapter comes in different versions, including QR skewer, though a longer skewer might be needed.

CliffordK 09-25-17 11:53 PM


Originally Posted by zebede (Post 19885814)
Why don't you just put the hitch plate in a vise and put a bend in it so that the hose connector is farther away from the shift box, while keeping the plate flat around the axle QR area.

If it is steel, you should be able to come up to a full 90°, and still have a little room, although perhaps it doesn't need to be bent that much.

You could probably bend it either hot or cold.

gdlerner 09-26-17 12:27 PM

I just contacted BF and the are always so helpful they make a special hitch for people with external Rohloff so I ordered one.

Thanks for all the suggestions

gdlerner 05-01-20 06:56 AM

Hi guy

can some one please tell me where do I need to measure the hitch to upgrade to weber coupling (they have different size )the small tube 1 or the big part 2with the nuts

https://www.bilder-upload.eu/thumb/7...1588337724.jpg


Thanks

2_i 05-01-20 07:58 AM


Originally Posted by gdlerner (Post 21448673)
Hi guy

can some one please tell me where do I need to measure the hitch to upgrade to weber coupling (they have different size )the small tube 1 or the big part 2with the nuts

The photo is really tiny/low resolution. Are you sure that part 2 is original? To me it looks like some extension that someone made to keep the trailer a bit farther away from the bike, presumably one that is full size. I do not have such a short tube addition and it is not there in any BF trailer images that I can see on the web. For the folder I do not think that you need the short tube at all. I.e. you can take it off and measure at 1.

Once you get some experience with the Weber coupling, can you please describe it? While I have used Radical Design coupling with the BF trailer, I thought about going the Weber route as it looks very versatile.

gdlerner 05-01-20 08:51 AM

I have no idea if this part is original I bought my trailer on ebay some years ago was sold as a reconditionar heavy duty.
Wich hicht are you using? Do you have a link? I wa thinking buying this parts
https://www.weber-products.de/de/sho...product-id=414
https://www.weber-products.de/de/sho...product-id=317

2_i 05-01-20 10:46 AM


Originally Posted by gdlerner (Post 21448879)
I have no idea if this part is original I bought my trailer on ebay some years ago was sold as a reconditionar heavy duty.
Wich hicht are you using? Do you have a link?

https://www.radicaldesign.com/hitch-ball
https://www.radicaldesign.com/hitch-trailer-side

I also needed a piece of a steel reinforced pneumatic hose + hose clamp and bolts to finish this off. Mounting the Weber coupling could be more straightforward from the trailer side.


Originally Posted by gdlerner (Post 21448879)

These are exactly the parts that I wanted to try out for the start. One longer term issue is of the pressure on mounting on the axle - my current best kickstand on the folder is there too and there is not enough axle length to mount both without serious risks.

Jipe 05-01-20 12:32 PM


Originally Posted by 2_i (Post 21449094)
https://www.radicaldesign.com/hitch-ball
https://www.radicaldesign.com/hitch-trailer-side

I also needed a piece of a steel reinforced pneumatic hose + hose clamp and bolts to finish this off. Mounting the Weber coupling could be more straightforward from the trailer side.

I have a Brompton with a Rohloff with external gear box and I can use the standard Radical Design hitch ball with my Cyclone IV Chubby trailer without any problem,

https://cimg3.ibsrv.net/gimg/bikefor...2a4de3d20d.jpg

2_i 05-01-20 01:03 PM


Originally Posted by Jipe (Post 21449307)
I have a Brompton with a Rohloff with external gear box and I can use the standard Radical Design hitch ball with my Cyclone IV Chubby trailer without any problem,

The one below is the standard for Brompton, when nothing interferes. The arm grabs the chainstay and prevents rotation. By putting the ball backwards you can reduce lateral size.


https://cimg1.ibsrv.net/gimg/bikefor...a860eb515d.jpg

Jipe 05-01-20 02:11 PM

I have also this special for Brompton hitch ball one but I had to rework it a little to make it fit with the Rohloff external gear box.

The standard hitch ball fits with a Rohloff without any rework.

gdlerner 05-12-20 11:56 AM

I just got a used weber e and I tried to mounting on a the bike but I am not sure if I am doing right please see the pictures ,for what is the small metal part where you put the safe metal rope it is ok like this in the air or need to be close to the frame.The problem is with the Rohloff I need some space I just put some metal part to use as a space need something better
Thanks
https://cimg8.ibsrv.net/gimg/bikefor...230793ae28.jpg
https://cimg1.ibsrv.net/gimg/bikefor...8906da2add.jpg
https://cimg6.ibsrv.net/gimg/bikefor...7ec70429df.jpg

gdlerner 05-12-20 12:33 PM

I just find out the weber cargo they don t have this extra part
Do you think is a good to buy this part
https://www.weber-products.de/de/sho...product-id=823 to get more sapce?

CliffordK 05-12-20 01:55 PM

I like the looks of those Weber hitches, although I don't see the lock mechanism.

My German isn't very good. :(

Obviously you only need that keyed washer if you actually need the actual space, or have a dropout that doesn't fit the hitch well.

I see they sell the cables. I'd send a note to the company asking if you can buy the catch for the cables.

https://www.weber-products.de/de/sho...product-id=806

Personally, I only carry cargo with my trailers, and never kids. I generally don't use any safety straps/cables, and they only seem to get in the way. In general, I'd be more concerned with a loose trailer attached to the bicycle than a loose trailer disconnected from the bicycle.

2_i 05-12-20 04:42 PM


Originally Posted by CliffordK (Post 21471018)
I see they sell the cables. I'd send a note to the company asking if you can buy the catch for the cables.

https://www.weber-products.de/de/sho...product-id=806

Personally, I only carry cargo with my trailers, and never kids. I generally don't use any safety straps/cables, and they only seem to get in the way. In general, I'd be more concerned with a loose trailer attached to the bicycle than a loose trailer disconnected from the bicycle.

Think about going uphill and the trailer detaching and running under a public bus or something. The securing cable does not necessarily need to be from the hitch manufacturer - just any reasonably thick cable with loop ends made.


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