Originally Posted by woody
according to Specializes spec sheet, my current bars have a diameter of 38mm.
Are you sure about that 38mm size ?
There are generally two sizes in the MTB world
25.4mm - the standard size in recent years
31.8mm - The 'new' oversized bars
It looks like from specialized web site that your riser bars have a 38mm rise in them and they do not specify a clamp diameter. Usually, when they do not specify a diameter it is 25.4mm, but make sure you check before you buy a new bar.