Thorn Accessory Bar

I have been looking for a bar like this to mount a handlebar bag on my seat post. I know I could make one but I was hoping to get one as a single unit.

There are a few versions of this item sold by SJS cycles. But is anyone aware of one of these available in the states? I have seen similar items like a Topeak model. But I think those are for lightweight items and not a heavy bag.

I have a handlebar bag I like, I don't want to mount a seat post rack. I want to use this bag on the seat post.

Thanks.

most of these accessory bars that i've seen are mainly made to hold bike computers and lights only as well as other tiny trinkets instead of an actual bag.

but if you have a typical cromo seat rails can't you just buy 2 carabiners and attach it to the loops on the bag? only problem i see if the side to side swaying but if it is just a small bag it shouldn't be too much of a problem. this would totally depend on the bag you are mounting on there.

Want it in the US ? Pay someone to make one for You .

Its a 7/8" Tube T welded together and onto a section of Tubing that grips either the Threadless Steering Tube (9/8")

or the seat post (insert seat post Diameter, here) ..

Klick Fix (german) has adapters to Use their Bar Bag and Basket Mounts on the seat post.


There are workarounds if you are a bit Mechanically Inclined ..

I was really just asking are these available from a US source. It's not easy to define and search for on the web, the question is what do you call it?

As I mentioned, I know I can make one but it seemed generic enough that maybe something was already available. I think that Thorn is a house brand of SJS cycles so I don't expect to see those from US sources.

I was looking for the experiences of the forum posters, generally there is already a product available to meet needs for most problems.

I don't want to buy a new bag. I've got a decent one, I didn't pay much for it, it's big enough for my needs , it folds reasonably well for packing and mounted it should not wave around. So thats what I am hoping to use.

Yes, Thorn Is SJS brand, Stewart Thorne is the guy that owns the shop, I think.
they are the Ones that contracted to have them made, So No.. get them shipped From England.

But its a simple item for a US/CDN welding/machine shop, commercial or home based, to make..

what handle bar bag specifically are you working with? have a picture of the back side, where it is mounted? its mounting scheme..
Straps based .. consider fittings that are made to mount 2 water-bottles behind the saddle as a way you can fit a bag on them ..

I was able to use one to fit my carradice bag to a plastic saddle.. with one Minoura made..

Just wondering, what bag do you have? Any pics or links?

They are a Thorn product, nobody other than SJS sells them that I know of. I have a couple of them, but I ordered a bike frame and fork and lots of other stuff from SJS so the shipping cost to USA on a per item basis was not too bad. If you only want one item like that, you can buy it from SJS but the shipping cost is very high to USA.

The Thorn ones are strong metal, not the cheap light plastic ones that some use for computer brackets, the Thorn ones are designed for the weight of a handlebar bag.

Any reason you do not want to use a second stem? I know that you want to put it on a seatpost, not fork steerer like in my photo, but I would think that with the right shim you could mount a second stem on a seatpost. In the photo I use a short section of PVC pipe in a second stem to hold the handlebar bag bracket, but a piece of cut off handle bar would be stronger than PVC pipe.



I have the 55mm length Thorn T bar in this photo on this bike.

Pasted from their website, this is what SJS stands for:

St John St Cycles
91-93 St John Street

Thanks for the info about this bar availability in the states. I was hoping there might be a similar product in the US. I may have to put something together myself but I don't have a lot of loose parts laying around. I'm sure that even if I had to scrounge up a stem, that would be cheaper than having one of these T-bars welded together. I'm surprised that there isn't another source. This seems like a simple/universe item.


Someone else asked what bag I have. It's nothing special. It's a Bell bag. Something 500. But it disconnects easily, it's large enough and it will fold flat. I like it for what it is. This folder is planned to be my low cost project and the repurposed bag is intended to avoid putting a rack on this bike. I don't want to have to remove a rack when packing.

there are Quick remove beam racks , if you get over the attachment to than budget HB bag ..

Or Take up a little sewing so it may velcro onto the Beam rack rails.

OR, then a Rack top bag on top of the beam rack, you might find one of those, used , perhaps..

I actually have a quick release beam but don't want to drag it around on travel. That's why I liked the collapsible bag with the seat post mount, so it fit easier in the suitcase. The rack is heavier than required for the support I need. It's collapsible, large and holds it's shape when in use (not saggy). I almost pushed the button on a cool Topeak seat post mounted bag, but I think it's soft but stays in a clamshell shape. It is huge, I saw a helmet loaded in it in a photo.

Thanks for the suggestions though. I have an old mountain bike that might become a donor. I gave it to my daughter and she says the front shock is blown. I'm not so sure of that but if so it will start being stripped soon.

With all the variation of equipment out there I am surprised sometimes at what's not available. This wouldn't be just folder equipment.

I like large cotton canvas Carradice saddle bags .. the company has QR mounts that uses the saddle rails.

though Popular B 17 saddles have strap loops.

I found my T-Mount!! Minoura SGS-400 OS Handlebar Accessory Mount: 27.2-35mm. I had to order the oversize one, the Genesis seat post is 34 mm dia. I ordered one from ebay for $18 shipped. This one is not a solid handle like the Thorn brand but I don't expect to load it that heavy so I think it should be fine. The finish appears very nice from the photos. If I needed one for handlebar accessories, I would probably go for this model over plastic.

Minoura Japan ? SG-400

That looks perfect.

I wonder about the mass that mount will tolerate though.

I am curious also but it has to be better than the plastic options. Most other Alum components are not thick wall