The rod I use is the 8'9" 3wt. Love that rod, and TFO has an awesome warranty to go with it. My reel is GLoomis, cant remember which one it is, my Dad got it for me for my bday couple of years ago. Love the combo. Light, feels/fishs good and breaks down fairly small.
I dont have it handy to measure right now, but the tube I made for it (ABS pipe) is about 32" or so end to end. This is how I mounted mine. Works well with the boxes on, when theyre off it can be a bit trying going thru bushes and such. I dont have any pics, but Ive since started carrying it lengthwise with the bike, ziptied to the back of the pannier racks.