Height
Maximum comfort is usually obtained when the handlebar height is equal to
or slightly higher than the height of the seat. You may wish to try different
heights to find the most comfortable position.
Stem
The stem’s “Minimum Insertion” should not be the top of the headset. If the
stem is extended beyond this mark, the stem may break or damage the fork’s
steering tube, which could cause you to lose control or become injured.
Place the front wheel of the bicycle between your legs and attempt to twist
the handlebar/stem assembly using a reasonable amount of force. There
should not be any play in the handlebars or in relation to the wheel. If you
can twist the handlebars while the wheel remains in place, do not ride it until
proper alignment is obtained. Make sure to tighten all bolts accordingly
before use.
Failure to properly tighten any of these properly could result in losing control
of the bike and rider injury.