Looking for a one compartment handlebar bag. Barrel shaped. Non bike specific bags ok. 14" wide by 8" dia approx. Big enough for a pair of pants and a light shirt and a heavy shirt.

Waterproof a plus.

Searching online fell short. too big, too small, too square too expensive. Didn't Banjo brothers used to make something like this?

IMG_3867 by mbeganyi, on Flickr

revelate sweet roll, comes in 3 sizes:
https://www.revelatedesigns.com/inde...-Bar/Sweetroll


Untitled by mbeganyi, on Flickr

IMG_3586 by mbeganyi, on Flickr

revelate harness and the dry bag of your choice: (and my old pocket on there)
https://www.revelatedesigns.com/inde...arharnesssling

Sounds like all you need is a stuff sack, two straps, and two short pieces of pvc pipe to offset the bag away from the bars. The straps go around the bag and the bars, but are threaded through the pvc in between. I have found that setup to work well. If you want waterproof, a roll top waterproof stuff sack would be suitable. Maybe one of the Sea to Summit Evac ones. The whole deal can be dirt cheap.

Gah ! I forgot. I'd prefer no end-loading. But if it comes to that, I'll stuff sack it. I'll look again at the sweet roll.

Can you flop the sweet roll over the bar so it's center is resting on the stem?

mount it upside down?

this isn't my image, thread about it here:
Cheap handlebar stand-offs

here i'm using the 4 point attachment for the jones loop bar:

Revelate Sweetroll. by mbeganyi, on Flickr

Sweetroll 4 point attachment to the jones loop bars. by mbeganyi, on Flickr

here i'm using just the 2 point attachment and the head tube strap:

Revelate Sweetroll. by mbeganyi, on Flickr

Could you mount that atop your bars?

why?
i don't see why not.

Thanks for the picture. That is what I was describing. I find it works very well. I have hung a small camera bag on top of it sometimes and that worked well too.

BTW, on the comment about not wanting end loading... Barrel shaped bags are most suited to stuffing and end loading is the way to go with that IMO. I once had a barrel shaped handlebar bag somewhat like you describe. It has a zipper lengthwise, and it was pretty awkward in use other than very loosely and lightly loaded. It was a 1970 something vintage Cannondale bag. I might actually still have it around if you are interested, but I don't really recommend it.

Ortlieb's Rack Pack Small size opens on the long side ORTLIEB Produkt-Details

Contents will stay Dry and Clean 24 x 48cm, and you can strap It on to your Bars like the other stuff..