Are the Stans ZTR Flow 29r compatible to run with tubes and a smaller sized set of tires such as 35c? Currently trying to mount my Ritchey Speedmax 35c tires on these rims and having quite the wrestling match and no success. Tires just seem too small and I don't know if its the manufacturer/tire itself as I've been told that some brands of tires run a little small or big or maybe these rims are not compatible with my goal of using them on my Surly Long Haul Disc Brake Trucker (touring bike). Thoughts? Suggestions? Thanks in advanced...