I want my bike to be very light, i like "extralite roadstem oc", extralight site says it's "rock solid", i like Zipp SL145 carbon stem too i believe it's stiff enought but it's 1.5 times heavier that extralite.
I can't even imagine cracked stem and don't know if it's possible.
Would be good if you will recommend something light too.
Btw i'll have suspension fork (riding street trials) and it's better for stem to have suspension.