Spyderco's 15V MicroJimbo Is a Steel Nerd's Wharncliffe
New steel day is the most reliable content in the knife community, and a 15V MicroJimbo is a better example than most. CPM-15V is not a sensible choice for a general-purpose pocket knife, which is exactly why people chase it.
15V is a high-vanadium powder metallurgy tool steel, and its defining property is wear resistance: it holds an edge through abrasive material longer than almost anything else in the production catalog. The price is toughness and corrosion resistance. A 15V edge is hard and wear-resistant but comparatively brittle, and it will rust if you treat it like stainless steel. Spyderco runs it at high hardness in sprint runs, which is a deliberate play for the enthusiast market.
The MicroJimbo is the small version of the Yojimbo family, a Michael Janich design built around a straight-edge wharncliffe for defensive and utility cutting. The shape puts the point low and on the centre line, gives a long straight edge, and works best with a forward grip. On a small knife, that translates to excellent control on tape, cord and packaging.
The trade-off is the same one every sprint run carries: you are paying a premium for a steel whose advantage shows up in abrasive cutting and whose weakness shows up the first time you twist the edge. For a knife that mostly opens boxes, 15V is overkill in the best way and a liability in the worst, since a hard, brittle apex on a thin wharncliffe does not tolerate prying.
Verdict: buy it if you want a wharncliffe with genuinely exceptional edge retention and you accept that it needs dry storage and careful use. Skip it if you want a knife to abuse, because S30V or MagnaCut at the same size will shrug off the mistakes that 15V will not.
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