Originally Posted by Toadmund
The answer for a large down tube that's too big for the adapter is to go and buy a muffler clamp, get a drill and bits, a piece of sturdy metal or the plate with the adapter and get to work making it work.
Do these bikes have disc brake mounts in the rear? (or anywhere)
Thank you, i will give it a try on your idea.
These bikes dont have disk brakes my only problem is the downtube