Courtesy of HH
The frame must have a bottom bracket height of at least 265mm (from ground to centre) when using 165mm cranks (more if using longer cranks)
Gearing should be between 82 and 88 gear inches for novice riders. (48 x 15 (86″) is ideal for adult riders); a slightly higher ratio around 88-90 gear inches is preferred for racing.
Bottle mounts are completely fine btw - just no braze ons