Has anyone tried to hang either a Klickfix or Brompton bag onto the stem using a Caddy/Rhinowalk adapter?
https://cimg4.ibsrv.net/gimg/bikefor...c7028f1054.png
https://cimg5.ibsrv.net/gimg/bikefor...0f294ca98a.png

This bike design looks uniquely unsuited for a Brompton block. As you likely know, it works well if it is connected to the frame rather than parts of the steerer setup.

Yes, but has someone tried either adapter?

Ideally, some of the bag's weight would sit on the stem.

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Edit: A couple of Minoura mounts is a third option:
https://cimg7.ibsrv.net/gimg/bikefor...95464845c3.png
https://cimg8.ibsrv.net/gimg/bikefor...760b965382.png
https://criticalcycling.com/2018/02/...-easy-version/
https://www.amazon.co.jp/-/en/Minour...dp/B00497F5KK/
https://www facebook . com/groups/329730464430691/?multi_permalinks=1447468359323557

Ideally none of the weight should sit on the stem or steering column. I have tried the Klickfix adapter, the Ortlieb version, mounted at the handlebar/handlepost junction, and it's ok for narrow and light loads, but it becomes unwieldy for heavier and wider loads. Not something I wish to revisit or recommend.

https://cimg9.ibsrv.net/gimg/bikefor...26b8728dc1.jpg

https://cimg0.ibsrv.net/gimg/bikefor...69efa48486.jpg

https://cimg1.ibsrv.net/gimg/bikefor...fc441a7379.jpg

I would first install the caddy on the seatpost than on the steering column. Like this:

https://cimg0.ibsrv.net/gimg/bikefor...076bce9bbb.jpg

https://cimg3.ibsrv.net/gimg/bikefor...7090885530.jpg

Sure, but the stem on the Ori prevents that solution

On another folder, I don't notice much difference in steering with a few kilos in a stem bag hanging from that Klickfix Caddy adapter. Since I carry about 8-10kgs in my Brompton touring bag, I'll investigate that Minoura clamps + L bracket + Brompton carrier block setup

I mounted Brompton blocks on several bikes not foreseen with any mounting points for it (two Moulton, two Birdy, two Tern) and found out that the lateral torque applied by the bag on the block is very high. This torque increases when the bag is wide (40cm, which is the width of the widest original Brompton bags, or more like possible with the Radical Design Roltoptas) or/and heavily loaded (at or above the 10kg limit specified by Brompton).

I am afraid that a clamp around a round tube won't prevent the block mounting to turn around this tube. Drilling a small hole in both the clamp and tube and putting a pin in it that prevent the clamp to turn around the tube would help.

Thanks for the tip. Or I could just run a couple of straps from the handlebar to the bag's frame to prevent the clamps from turning around the stem.

https://cimg6.ibsrv.net/gimg/bikefor...3f65d790b5.png

Just do it. Mount the block with those straps that are set by screws. I think my Swytch kit has a 4-pound battery, and I don't notice that. You could also attach a saddlebag as shown. I think that on most folders you would be limited by knee space and would not notice that.

I saw that this page has additional attachments about 3/4 way down the page.

(no https)
mybikesite.org/#Carrier_Block_Other

https://www.amazon.com/Platt-bike-bottle-cage-mount/dp/B09BL46Q9X/
https://cimg5.ibsrv.net/gimg/bikefor...4368839aae.png

The reason that the Brompton system works so well is because it's on the headtube of the frame and doesn't effect steering. I've always hated mounting bags and baskets to people's handlebars because it messes up the steering(and they usually overload them) plus they can mess up the cables. You can put 22lbs on the carrier block,that's too much to put on the bars or stem. One of the reasons I sold my Mezzo was the fold was a mess,and this shows one of the drawbacks to the Mezzo design.

I'm speculating, but perhaps the issue is more to do with the distance off the steering axis that weight is applied. So that if the weight were concentric with the steering axis, there would be less problem with the flop, like caused by baskets.

More weight on the steering has always an influence on how the steering behaves.

The same happens with low riders pannier on the fork and with ebikes that have a front hub motor where the additional weight is placed much lower.

Is this really a problem for front-wheel-drive e-bikes? If so, those big honking Crysatlyte motors would likely have issues. Anyway, the more off centric the weight, the more influence it has.

It depend of what is considered to be a problem.

If a problem mean that the bike is unusable, then its not a problem.

If a problem mean that the bike is less pleasant to ride, then yes its a problem (at least for me).

I had a front rack for low riders and low riders on one bike and, even if the bike was fully usable and still safe to ride, definitely didn't like them, I replaced them by a Brompton block on the head tube (custom mounting, there were no mounting points) + a front bag and what was a problem for me disappeared, i.e. the steering was again like without front bag or low riders.

That is whole different thing then front drivee-bikes, but why?