I have an LHT and I currently keep my tools, spare tube, and such things in a saddle bag. I don't like using it though because it sticks out too far behind my seat and blocks too much precious real-estate above my rear rack.

But, there's plenty of room for a tool bag in the rear triangle. I was wondering if anyone makes such a bag that would fit in there nicely?

Thanks.

At one time I used an old Cannondale tire sock. The velcro straps normally intened for the seat post were long enough to reach around the down tube and strap over the top tube. The other strap on the bag went around the seat tube at a lower point. It stayed in place nicely wedged between the seat tube and rear fender on my Specialized Expedition. It worked quite well but I wanted to use it as originally intended on another bike and switched to a small under seat bag.

I just mount my saddlebag above the rear fender. While it doesn't put a lot of pressure on the fender, when I have ridden without the fender, the bag will sometimes rub the tire.

(edit - this is on a Fuji Touring)
(edit - added image)

Wht not just use a small pouch for the tools, etc, and throw the pouch in your pannier? (assuming of course you are using panniers).

I used to do that as well before I switched to using panniers instead of the trunk bag.

+1, What is the issue with putting the tool bag in the pannier?
If I need to fix stuff I have to unload the weight ..
take the Pannier off to say get to the derailleur, etc.. .

read of Other people taking the tool filled saddle pack, off the bike while parked .

I'd hate that..

+1. Actually, I don't even use a separate bag. A tube, allen wrench set, etc., just goes in the outside pocket of one of my panniers to they are easily accessible.

I can put a tube, tire levers, very small multi-tool, some latex gloves to keep my hands clean, a plastic bag to go on my seat in the rain in one of these tiny little pouches.
https://www.probikekit.com/us/contine...es-levers.html

They make two types, MTB and road. The road one is smaller and I can't fit enough stuff in it, I only use the MTB version.

Never thought I'd have to justify having my tools in a saddle bag...

My touring bike is also my commuter. Sometimes it has a single pannier. Sometimes it has a trunk bag. Sometimes it has small panniers. Sometimes there's no bag at all.

All of my bags can be on any of my bikes on any given ride. My MTB has different size tubes than my tourer than my vintage road than my beach cruiser. Each bike has it's own tools and tube so that no matter what bag/bike combination I leave the house with, I've got what I need.

The 26" LHT has lots of space there. I fit a Jandd Hurricane seatbag in there upside down w Velcro holding the bag up to the seat cluster and the main strap holding it to the seat tube. It needs another strap going to the seat stays to really hold it tight.

https://www.jandd.com/detail.asp?PRODUCT_ID=FMMWH

That bag is big enough for two 26"tubes,6" Crescent wrench, two small patch kits, misc. allen wrenches, Powerbar, knife,etc and that's before stuffing the outside pocket.

If you don't need to use the 3rd water bottle cage, it comes in handy for a lot of things.

now thats just silly,
Nutella would be more appropriate.

I designed my bike to use the minimum tools possible, and they fit in a small sack I keep in the panniers. I try to keep clutter off my frame, for security, and efficiency.

Its too bad Jannd -or any mainstream bike accessory manufacturer to my knowledge -doesn't offer a rear triangle bag.

its quite a handy place to put a tool bag on a long chainstay'd bicycle. I believe they were available in the 1970's

Tallac Behold Tool Cage and Kargo Bag
Saw this a couple weeks ago, mounted behind water bottle cage.

That's pretty cool. They've got some other mounting options, as well: https://www.tallacdesign.com/

Two or three sizes would do it

Is this what you are looking for? https://sunlitecycling.com/product_de...r+Bag&cl1=BAGS

Or maybe this? https://https://www.axiomgear.com/products/gear/bags/specialty/cascade/

If your looking to spend some $$$ try https://https://www.revelatedesigns.com/index.cfm?fuseaction=store.catalog&CategoryID=1

Lots of bags in various sizes for the FT, as you can see. Yeah, a premade bag for the rear would be nice, but pretty easy to DIY.
+1 to all of that, that`s me, too. I usually use a small under the saddle bag, but I have some odd bikes (recumbent, softride tandem, folder) and some of them lend themselves well to a little big bigger permanent bag of a different shape that can also handle a little bit of cargo. When touring, I`ve been tempted to stuff it all in a pannier and keep things clean, but sometimes I leave the panniers behind for a side trip, so it`s back to having all my necessities along with me. Might as well just leave it under the saddle, and I know I`ll have it when the need arises.

Cool stuff on that Tallac site- thanks for the link.

Indeed they were. I lost the one I bought back then, but when I purchased a used mid-'70s Trek a couple of years ago it came with one. It could be bigger, but comfortably holds a multi-tool, two tubes, levers and gloves.

It would be pretty easy to DIY one. Four velcro straps (two for the seat tube and one each for the seat stays), a zipper and whatever material you choose. Since its location is clear of your legs it doesn't even matter if it lumps out a bit.

I have an old version of Topeak's Survival Gear Box. The updated versions look to be even better. Light, small, carries the essentials. Clips to my seat tube and uses that rear triangle space.