ChristopherFranklin wrote:I'm doing Mt Whitney in the spring.
Well, that's a long ways off. Mountaineer's route or trail? Either one, you will want crampons with front points, 10 or 12 point, certainly not in-step. Is spring June 19, or April?
TRY YOUR PREFERRED BOOTS WITH THE CRAMPONS. If that's not possible, you may have to cut into the boot soles to make sure there is a good fit. Some strap-on crampons have a low back harness, not compatible with many boots (e.g. the old BD contacts could be a problem). If your boots are burly enough, you may be able to go with step-in crampons, or semi-automatic.
Many folks from our local club have done Whitney by the mountaineer's route in April, just using g10s, AND AN ICE AX. Even the "trail" is a nasty place in April.
Pick your boots (at least commit to a particular type), then pick your crampons. The most widely adaptable crampons are strap-on 10-12 point. Recent threads have bemoaned the pairing of softer-soled boots with non-flexible crampons. The best bite comes from crampons that have a rigid connecting bar, suitable for boots that have the equivalent of a 1/2 to 3/4 shank. Soft boots may demand a crampon with a flexi-bar between the front and back.
If you go up the mountaineer's route in spring, you will certainly want to have an ice ax, for self-belay and self-arrest.