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Modding a bag to fit a Brompton carrier?

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Modding a bag to fit a Brompton carrier?

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Old 01-26-19, 10:10 AM
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mlau
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Modding a bag to fit a Brompton carrier?

I found that I really like my new used Brompton.

I also have a Tom Bihn Maker's bag that I don't use much.
it was the first bag that survived more than a year with me.

Do you have ideas how I can adapt it to my Brompton?

I know that I need to start with a frame, but which frame?
C frame? S frame? Rolltop frame?

Also, I saw a thread here from someone that made her(?) Own bags.

I would love more pictures and ideas.
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Old 01-26-19, 11:10 AM
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An image search via Google tried yet,. ?

a feature of my sewn Brompton Touring bag is a Sleeve to slide over the frame, and Velcro strap pair that goes under it, so,

when you lift the handle on the frame, or bag, the bag comes off with the frame..
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Old 01-26-19, 11:58 AM
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I've made a number of bags for my bicycles, mostly my vintage steel road bikes, so not a Brompton. Pictures of your current bag and where it is mounted would be helpful in offering suggestions.

This is the latest set I made for a '70s Gitane and to match the remade @rhm custom saddle. I repurpose purses. It's part of my winter "stay sane" therapy.



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Old 01-26-19, 01:01 PM
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Excellent work.
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Old 01-26-19, 01:16 PM
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Wow! With colors matching the bike!
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Old 01-26-19, 01:24 PM
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OK but its not a bag to go on a Brompton bag frame ..Is it ? make one of those yet? Go..

I have a Messenger bag with a waist band, as well as the shoulder strap, I could weave the waist band in among the bag frame tubing ,

and snap the buckle closed , and so QR remove the bag & frame as one ..
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Old 01-26-19, 04:04 PM
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Originally Posted by fietsbob View Post
OK but its not a bag to go on a Brompton bag frame ..Is it ? make one of those yet? ...
Sheesh you can be annoying. Most times I ignore you. As I said in the post, I've mostly made bags for vintage road bikes. I don't even own a Brompton and as best that I know, no one owns one in my area, so I can't easily make one for a Brompton. Because I don't own a Brompton nor made a bag for a Brompton, does that make me unqualified to offer suggestions?

Last week I finished a bag for my Dahon, so I have I have some Folding Bike bag making experience. It straps under my main frame and carries the wiring and electronics for my lighting and to charge my cell phone, which it will also hold. Pardon the long straps. This was a fitting before I cut them to their final length.



I picture my recent bag construction as examples that they can be made from scratch. If the OP, @mlau , could post a few pictures, I'd be glad to offer suggestions and tips for a DIY bag project.

Thanks @2 I and @Schwinnsta for the compliments. I enjoy being creative with my hands while watching TV at night during our long NH winters. My daughter gave me a Yeti Loadout Bucket for Christmas. I'm currently making a tool skirt for it!

I also enjoy helping others by sharing from my own experiences.
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Old 01-26-19, 04:09 PM
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Originally Posted by fietsbob View Post
An image search via Google tried yet,. ?

a feature of my sewn Brompton Touring bag is a Sleeve to slide over the frame, and Velcro strap pair that goes under it, so,

when you lift the handle on the frame, or bag, the bag comes off with the frame..

I've been looking at waaaaaay too many images and videos....enough that Google is annoyed at me.
https://forums.tombihn.com/photos-vi...-brompton.html
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Old 01-26-19, 04:10 PM
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Hey Bob,

Great work. Very nice color matching of the leather bits.

As for the frames...I'm not sure what sizes things are.
They don't exactly list dimensions on any website that I've found.
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Old 01-26-19, 04:29 PM
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29 by 40cm standard, S is shorter, same width

Brompton dealers in SFO? I count 6 looking it up , online..

And you have one where you live.. to go into..
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Old 01-26-19, 06:59 PM
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Originally Posted by mlau View Post
I found that I really like my new used Brompton.

I also have a Tom Bihn Maker's bag that I don't use much.
it was the first bag that survived more than a year with me.

Do you have ideas how I can adapt it to my Brompton?

I know that I need to start with a frame, but which frame?
C frame? S frame? Rolltop frame?

Also, I saw a thread here from someone that made her(?) Own bags.

I would love more pictures and ideas.
Okay, I found this Brompton C/T Frame on ebay. I'm still not certain how this works, but I'm guessing it somehow quick releases from some mount on the headtube of the Brompton.

To me it looks relatively easy to sew/construct a leather bag around the frame. As far as attaching your existing bag, I would think that Velcro tabs might work. However, seeing how expensive the Tom Bihn Maker's bags cost, I'd be hesitant to modify one.
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Old 01-26-19, 07:41 PM
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I have a T-bag and it has a tight sleeve in the back into which the back of the frame slips in. The sleeve closes up with two wide straps that attach with velcro to the bottom of the bag. The velcro covers at least half of the area of the bottom so it has a strong holding power. Most people presumably never even notice that the velcro is there and that the frame and bag can be separated.
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Old 01-27-19, 11:27 AM
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Carradice UK is another company , making a number of bags for the Brompton bag frames https://www.carradice.co.uk/bags/commuting-folding

they link to another company using printed truck tarp fabrics https://upsobags.co.uk/bags



a number of threads on the adapting the Dahon front head tube mount and the Brompton one, which is quite different, so as to use Btomptons bags

is in the past, archived here , and on the Web in general..






....

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Old 01-27-19, 11:38 AM
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Ah.

I will try to stop by a dealer some time next month.
Next week, I am super preoccupied with training.

I will try jury rigging some straps on my Maker's bag.
While there's no slot for travel, I found a pair of key straps and a free lanyard might work.
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Old 01-28-19, 04:53 AM
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Originally Posted by mlau View Post
Ah.

I will try to stop by a dealer some time next month.
Next week, I am super preoccupied with training.

I will try jury rigging some straps on my Maker's bag.
While there's no slot for travel, I found a pair of key straps and a free lanyard might work.
Attaching a frame to an existing bag works but often demolishes the optics. What you can do ist simply strap the bag to a naked frame, using the frame as a carrier. You'll however soon be annoyed by the bulkyness of the frame. There are dedicated front-carriers on the market that are less bulky like i.e. this one from Fahrer-Berlin. There are also ones from H&H that you can i.e. get from Asia via ebay. So you have the choice between:

- getting a dedicated Brompton bag (plenthora of makers and possilities)
- modifying your existing bag with a frame fixed to it
- strapping your existing bag to a frame or a front carrier

Most (but not all) people end up with option one sooner or later as it turns out that the dedicated bags have their advantages in daily life for them. If you want a fixed attachment to your existing bag you are not limited to Brompton frames - there are also adaptors to the carrier block available out there that give you a bit more freedom in how to modify your bag (or you can make one yourself - it is not too difficult).
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