FB11 Kumo

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The FB11 Kumo is a compact fixed blade with a lot of traditional Japanese design influences.

Appearance in catalogs

The FB11 Kumo appeared in the following catalogs:


R.J. Martin

History, mentionings from the forums etc.

  • KUMO-Thanks Sal!, posted by forum member and designer of the FB11 Kumo RJ Martin

Information from the Spyderco catalog on the web

FB11 Kumo

"Kumo is Japanese for spider and a fitting name for the new Japanese influenced fixed blade knife designed by custom knifemaker R.J. Martin and manufactured by Spyderco. A self-professed steel junkie, R.J. Martin is celebrated for integrating multiple grind lines on the blades of his knife designs. Made from a solid 9-inch piece of VG-10 steel, the Kumo blade has two definite grinds: a swedge-grind along the spine and a hollow-grind above the non-serrated cutting edge. Converging in the center of the blade the two grind lines meet creating a look that is streamlined and pleasingly tapered. Where the thumb naturally settles on the blade are a series of notches that latch onto the thumb pad adding an appreciative level of grip and cutting control.

In Japanese fashion, the handle is wrapped with epoxy-saturated cord over an undercoat of pebbly black stingray skin that has a silver Spyderco bug Menuki peeking through the wrapping. The Kumo slips into in a fitted black Kydex sheath mounted with a TekLok detachable polymer clip that can be situated to carry the knife in five different carry positions: vertical, inverted, cross-draw, small of back or horizontal position. Overall length of the Kumo is 8-5/16" (211mm) it's PlainEdge cutting edge is 3-3/4" (95mm) and it weighs 3 oz (85g). " [1]


The FB11 Kumo features:

  • an almost Spear Point BladeSpear poin Crescent shaped blade, similar to a so-called Ulu design
  • a Boltaron Sheath
  • a traditionally Japanese style handle wrap
  • Lanyard hole in the handle
SKU Handle Edge(s) Steel From/To MSRP Note Number made Grind Clip Clip positions Sheath Collectors club
FB11 Japanese-style handle wrap PE VG-10 2006 - 2007 $199.97(2007) Regular production Hollow grind Teklok Multipositional Boltaron Main

Most collectible variation

The original FB11 Kumo complete with original box and papers in mint condition is likely to be the most collectible version.

Questions regarding collecting the FB11

Some interesting questions we are looking for an answer to:

Questions with an answer:

Technical information

Measurements (mm and grams) of the FB11 Kumo:

Variation Length overall Length closed Length blade Length edge Hole Ø Blade thickness Weight
FB11 213mm N/A 105mm 95mm N/A 2.5mm 86g

Measurements (inches and ounces) of the FB11 Kumo:

Variation Length overall Length closed Length blade Length edge Hole Ø Blade thickness Weight
FB11 8.375" N/A 4.125" 3.75" N/A 0.093" 3oz


  1. The FB11 Kumo in Spyderco's online catalog


The FB11 Kumo, designed by R.J. Martin




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