Originally Posted by
cyccommute
A good way to check a road bike for touring length is to check the distance between the seat tube and the rear tire. For a classic touring bike, you should be able to put 3 fingers in the space between the seat tube and the tire. Sport touring will take 2 fingers. Race bikes often have less than one. Here’s a race bike. See how short it is and how little room between the seat tube and tire
DD
thanks a lot especially about the tip about how long the chainstay needs to be, shorter top tubes and the 3 finger trick between seat tube/tire. In the first photo there is barely any space between seat tube/tire and second one maybe 2 fingers but the third is obvious that there is plenty of space